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Top JavaScript Developers

JavaScript powers everything from interactive websites to complex enterprise applications. Partnering with an experienced JavaScript development agency ensures your product is fast, secure, and ready to scale. Clutch makes it easy to find trusted providers by publishing in-depth, verified client reviews and transparent performance data. Use our filters to sort agencies by budget, location, framework expertise, and more. Looking for regional specialists? Browse firms in the United States, United Kingdom, or Canada to compare portfolios and pricing in your market. Start exploring today and shortlist partners that align with your goals.
Ratings Updated: September 20, 2026
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22,371 Companies

Programming & Scripting: JavaScript

List of the Top JavaScript Development Companies

  • Sync Clouds Logotype

    4.3 2 reviews
    $5,000+
    $50 - $99 / hr
    10 - 49
    Rawalpindi, Pakistan

    Services provided

    10% Web Development
    30% Cybersecurity
    20% Mobile App Development +5
    10% AR/VR Development
    10% Low/No Code Development
    10% UX/UI Design
    5% Advertising
    5% Social Media Marketing

    Focus Areas

    11% JavaScript
    17% Redux
    15% Kotlin +10
    6% ASP.NET
    6% C++
    6% Other programming & scripting languages
    6% PHP
    6% Ruby
    6% Typescript
    6% UnrealScript
    6% XML
    5% SQL
    4% HTML5

    Sync Clouds offers services in Website Development, Web Design, and Web Programming, focusing on transforming front-end interfaces and coding robust back-end structures. Reviews commend their adaptability and timely delivery, highlighting their ability to meet complex project requirements and exceed expectations. Noteworthy is their proficiency in addressing client feedback efficiently, although improvements in site dynamics were suggested.

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  • Neurale Computing Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    10 - 49
    Galle, Sri Lanka

    Services provided

    10% Web Development
    10% AI Development
    10% AR/VR Development +7
    10% Application Testing
    10% Blockchain
    10% Custom Software Development
    10% E-Commerce Development
    10% IoT Development
    10% Mobile App Development
    10% Other Application Development

    Focus Areas

    11% JavaScript
    11% AJAX
    11% Java +13
    11% Redux
    11% SQL
    11% Typescript
    9% Kotlin
    4% C#
    4% C++
    3% Ember.js
    3% Go
    3% Swift
    2% ASP.NET
    2% C
    2% Objective C
    2% PHP

    Neurale Computing, a software development firm, offers Custom Software Development and Web Development. The company is in Galle, Sri Lanka.

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  • CodeLight Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    10 - 49
    Montevideo, Uruguay

    Services provided

    10% Web Development
    30% Custom Software Development
    15% Mobile App Development +6
    12% Enterprise App Modernization
    10% E-Commerce Development
    7% Application Testing
    6% Sales Outsourcing
    5% UX/UI Design
    5% Web Design

    Focus Areas

    11% JavaScript
    19% Typescript
    5% AJAX +13
    5% ASP
    5% ASP.NET
    5% C
    5% C#
    5% C++
    5% Java
    5% Objective C
    5% PHP
    5% Redux
    5% Ruby
    5% SQL
    5% Swift
    5% XML

    Custom software development company CodeLight is headquartered in Montevideo, Uruguay. They offer Custom Software Development and Mobile App Development.

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  • IBC MOBILE INC. Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    10 - 49
    Phoenixville, PA

    Services provided

    10% Web Development
    30% Mobile App Development
    15% UX/UI Design +5
    10% AR/VR Development
    10% Custom Software Development
    10% Low/No Code Development
    10% Web Design
    5% Wearable App Development

    Focus Areas

    11% JavaScript
    17% Swift
    14% Kotlin +7
    11% AJAX
    11% Java
    11% Objective C
    11% PHP
    6% Redux
    6% Typescript
    2% C

    IBC MOBILE INC., an app development company, is located in Phoenixville, Pennsylvania. Launched in 2012, the team offers Mobile App Development and UX/UI Design.

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  • Ankuv Logotype

    Not yet reviewed

    $25,000+
    $50 - $99 / hr
    10 - 49
    Vancouver, Canada

    Services provided

    10% Web Development
    25% Mobile App Development
    13% Low/No Code Development +9
    10% AI Development
    10% AR/VR Development
    10% Blockchain
    5% E-Commerce Development
    5% IT Strategy Consulting
    5% IoT Development
    5% Wearable App Development
    1% BI & Big Data Consulting & SI
    1% Custom Software Development

    Focus Areas

    11% JavaScript
    28% Python
    11% SQL +8
    11% Swift
    6% C#
    6% C++
    6% Go
    6% Java
    6% Other programming & scripting languages
    6% UnrealScript
    3% Typescript

    In Vancouver, Canada, Ankuv is a mobile app development company. Launched in 2018, the team focuses on Mobile App Development and Web Development.

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  • Fluxworth Logotype

    Fluxworth

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49

    Services provided

    10% Web Development
    20% Email Marketing
    10% AR/VR Development +6
    10% Content Marketing
    10% Graphic Design
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% Web Design

    Focus Areas

    11% JavaScript
    12% PHP
    11% C +6
    11% C#
    11% C++
    11% Java
    11% Python
    11% Redux
    11% XML

    Fluxworth is a small Email Marketing company located in Ikeja, Nigeria. Their services include Email Marketing and Social Media Marketing.

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  • TekScrum Logotype

    Not yet reviewed

    $5,000+
    $25 - $49 / hr
    10 - 49
    Manchester, England

    Services provided

    10% Web Development
    20% Social Media Marketing
    15% Search Engine Optimization +7
    10% AR/VR Development
    10% Branding
    10% IoT Development
    10% Mobile App Development
    5% Graphic Design
    5% Logo
    5% UX/UI Design

    Focus Areas

    11% JavaScript
    11% C
    11% C# +8
    11% C++
    11% Other programming & scripting languages
    11% Python
    11% Typescript
    6% Java
    6% Objective C
    6% Redux
    5% SQL

    TekScrum is a social media marketing firm headquartered in Manchester, England and Karachi, Pakistan. They specialize in Social Media Marketing and Search Engine Optimization and were founded in

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  • Duosol Technologies Logotype

    Duosol Technologies

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    10 - 49

    Services provided

    10% Web Development
    10% Content Marketing
    10% Digital Strategy +7
    10% E-Commerce Development
    10% Ecommerce Marketing
    10% Mobile App Development
    10% Other Application Development
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design

    Focus Areas

    11% JavaScript
    11% AJAX
    11% Java +8
    11% PHP
    11% SQL
    11% Swift
    10% Kotlin
    6% ASP.NET
    6% HTML5
    6% Python
    6% Typescript

    Duosol Technologies is a Digital Strategy company in London, England and Lahore, Pakistan. Their services include Digital Strategy and Social Media Marketing.

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  • codefreelancer Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    10 - 49
    Karatber, India

    Services provided

    10% Web Development
    25% Mobile App Development
    20% E-Commerce Development +6
    14% Low/No Code Development
    10% AR/VR Development
    10% Web Design
    5% Other Application Development
    5% UX/UI Design
    1% Custom Software Development

    Focus Areas

    11% JavaScript
    18% PHP
    11% AJAX +6
    11% HTML5
    11% Objective C
    11% SQL
    11% Swift
    11% Typescript
    5% Kotlin

    Launched in 2023, codefreelancer is a small Karatber, India-based mobile application development firm. Their team provides Mobile App Development and Web Development.

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  • ECONSCO Logotype

    Not yet reviewed

    $5,000+
    < $25 / hr
    10 - 49
    Faisalabad, Pakistan

    Services provided

    10% Web Development
    10% Branding
    10% Custom Software Development +7
    10% E-Commerce Development
    10% Logo
    10% Mobile App Development
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Design

    Focus Areas

    11% JavaScript
    16% HTML5
    11% PHP +9
    11% Python
    11% Ruby
    11% Swift
    5% ASP.NET
    5% C++
    5% Java
    5% Other programming & scripting languages
    5% Typescript
    4% SQL

    Located in Faisalabad, Pakistan, ECONSCO is a small branding agency. The team specializes in Branding and Social Media Marketing.

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  • BRAVA 360 Digital Logotype

    BRAVA 360 Digital

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    10 - 49

    Services provided

    10% Web Development
    15% Conversion Optimization
    15% Search Engine Optimization +6
    10% Branding
    10% Digital Strategy
    10% Low/No Code Development
    10% Pay Per Click
    10% Social Media Marketing
    10% UX/UI Design

    Focus Areas

    11% JavaScript
    12% AJAX
    11% ASP.NET +6
    11% HTML5
    11% PHP
    11% Python
    11% SQL
    11% Typescript
    11% jquery

    Located in Dubai, United Arab Emirates, BRAVA 360 Digital is a small Conversion Optimization company. The team focuses on Conversion Optimization and Search Engine Optimization.

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  • Freelancing Grow Logotype

    Freelancing Grow

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    10 - 49

    Services provided

    10% Web Development
    10% AR/VR Development
    10% E-Commerce Development +10
    10% Graphic Design
    10% IT Managed Services
    10% UX/UI Design
    10% Web Design
    5% Content Writing Services
    5% Ecommerce Marketing
    5% Logo
    5% Market Research
    5% Other Design
    5% Social Media Marketing

    Focus Areas

    11% JavaScript
    11% C++
    11% Java +7
    11% Other programming & scripting languages
    11% Python
    10% HTML5
    10% PHP
    10% SQL
    10% jquery
    5% C

    Freelancing Grow is a web design agency. The Faisalabad, Pakistan-based company was established in 2023. Their team offers Web Design and UX/UI Design.

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  • CraftDigitally Logotype

    CraftDigitally

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    10 - 49

    Services provided

    10% Web Development
    10% AR/VR Development
    10% Application Testing +7
    10% Custom Software Development
    10% Graphic Design
    10% IoT Development
    10% Mobile App Development
    10% Pay Per Click
    10% Search Engine Optimization
    10% Web Design

    Focus Areas

    11% JavaScript
    33% SQL
    12% AJAX +4
    11% ASP.NET
    11% C#
    11% PHP
    11% Python

    CraftDigitally is a SEO services firm. They are headquartered in Ahmedabad, India and have small team of experts. Their services include Search Engine Optimization and Pay Per Click.

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  • WeDevsClub Logotype

    WeDevsClub

    Not yet reviewed

    $1,000+
    < $25 / hr
    10 - 49

    Services provided

    10% Web Development
    10% AR/VR Development
    10% Application Management & Support +9
    10% Custom Software Development
    10% E-Commerce Development
    10% IT Managed Services
    10% Low/No Code Development
    10% Mobile App Development
    5% API Development
    5% Other Application Development
    5% Search Engine Optimization
    5% Social Media Marketing

    Focus Areas

    11% JavaScript
    17% Java
    17% PHP +8
    11% ASP.NET
    11% Kotlin
    6% C#
    6% HTML5
    6% Python
    6% SQL
    6% jquery
    3% AJAX

    WeDevsClub is a small Bareilly, India-based custom software development firm. The team offers Custom Software Development and Mobile App Development.

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  • Tuvoc Technologies Logotype

    5.0 10 reviews
    $5,000+
    < $25 / hr
    50 - 249
    Shilaj, India

    Services provided

    20% Web Development
    40% Custom Software Development
    20% E-Commerce Development +3
    10% Mobile App Development
    5% Application Testing
    5% Enterprise App Modernization

    Focus Areas

    20% JavaScript
    35% PHP
    30% SQL +3
    5% AJAX
    5% Kotlin
    5% Swift

    Tuvoc Technologies is a web development company specializing in creating secure, scalable, and user-friendly platforms, particularly within the fintech sector. They consistently receive positive feedback, with 100% of reviewers highlighting their expertise in developing customized, efficient web solutions that align with compliance standards. Clients commend their exceptional project management and responsiveness, contributing to enhanced user engagement and satisfaction.

    See all 10 projects

    Reviews mention Flexible

    Tuvoc Technologies has received positive feedback for its flexibility in project management and responsiveness to client needs. Clients noted that Tuvoc Technologies delivered projects on time while adapting to feedback and requirements seamlessly. The Managing Partner of Deloitte highlighted their ability to provide flexible solutions, facilitating a smooth process, while the Founder and CEO of ComplyAdvantage commended their quick response to feedback and round-the-clock availability, which significantly contributed to the project's success.
    • Mobile App Development for Business Consulting Company
      5.0 Feb 26, 2025

      Tuvoc Technologies had excellent project management, delivering each milestone on time and communicating extremely well throughout the process. They were very responsive to our requirements and provided flexible solutions to accommodate, enabling us a smooth, efficient process.

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    • Enterprise App Migration & Dev for Fraud Detection Platform
      5.0 Feb 5, 2025

      Tuvoc Technologies used Agile approaches to manage the project while delivering it on schedule based on real-time progress tracking and structured sprints. The project advanced smoothly due to their ability to respond quickly to feedback alongside their flexible approach and their round-the-clock operations availability. Their transparent operational structure and efficient project management enabled them to surpass all expectations regarding both implementation quality and the quality of communication.

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    3 of 3 Web Development reviews are 5 stars
    1 new review for Web Development in past 6 months
    $50,000 – $199,999 avg. project cost

    Web Development PROJECT HIGHLIGHT

    Enterprise App Migration & Dev for Fraud Detection Platform

    5.0 — Tuvoc Technologies migrated a legacy enterprise system to a cloud-based structure for a fraud detection platform. The team rebuilt the UI, established automatic DevOps processes, and set up AI Read more
    Read 3 Reviews

    Average Project Cost Breakdown

    Less than $10,000 (2) $50,000 to $199,999 (2) $10,000 to $49,000 (1) $200,000 to $999,999 (1)

    What Clients Have Said

    Clients consistently highlight Tuvoc Technologies' competitive pricing and exceptional value for money. One client noted that Tuvoc's pricing fit their budget and offered good value for the cost, while another emphasized the alignment of company values and the ability to deliver a high-performing solution within financial constraints. Overall, the sentiment reflects satisfaction with both the affordability and the quality of services provided, demonstrating that Tuvoc Technologies is a reliable partner for cost-effective development solutions.
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    England (4) United States (2) India (1)
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  • YapApp India Pvt Ltd - Out of Business Logotype

    5.0 2 reviews
    $1,000+
    $25 - $49 / hr
    50 - 249
    Sahibzada Ajit Singh Nagar, India

    Services provided

    20% Web Development
    40% Mobile App Development
    20% Custom Software Development +1
    20% UX/UI Design

    Focus Areas

    20% JavaScript
    20% Other programming & scripting languages
    20% PHP +2
    20% SQL
    20% Swift

    YapApp India Pvt Ltd is a mobile app development company with expertise in creating Android and iOS applications. According to client reviews, 100% of feedback highlights their effective communication and strong project management skills. Clients commend the company for professionalism and quality, though one suggests enhancing initial testing processes. Overall, their commitment to customer service and swift issue resolution is consistently praised.

    See all 2 projects

    Reviews mention Communicative

    Clients have consistently praised YapApp India Pvt Ltd for their strong communication skills throughout the project lifecycle. One client noted, 'We selected them because of their good communication skills and fair pricing offer.' Another highlighted the effective workflow, stating, 'They managed everything easily with strong communication.' Overall, the sentiment regarding their communicative approach is highly positive, with no reported areas for improvement.
    • iOS App Dev for Business Services Startup
      5.0 Feb 28, 2019

      Working with them was effective and they managed everything easily. They had strong communication skills.

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    Industry Experience

    YapApp India Pvt Ltd has demonstrated expertise in the business services industry, particularly in developing mobile applications for both Android and iOS platforms. Clients praised the company's strong communication skills, professionalism, and quality of work, resulting in stable applications that meet specified requirements. Their impact includes successful app launches with integrated features like e-commerce and customer support. Overall sentiment is positive, indicating they are a suitable partner for businesses seeking mobile app development.

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    Select Industry to see insights

    Business services

    Average Project Cost Breakdown

    Less than $10,000 (2)

    What Clients Have Said

    Clients have indicated that YapApp India Pvt Ltd offers fair pricing and good value for money, particularly highlighting their effective communication and responsiveness. One client noted the 'good communication skills and fair pricing offer' as key factors in their selection. Another praised the 'fantastic customer service along with any fixes needed,' which reflects the company's commitment to client satisfaction. Overall, the sentiment regarding cost and value is positive, with clients feeling they received a quality product at a reasonable price.
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  • EasyComm Innovations Logotype

    5.0 1 review
    $1,000+
    $25 - $49 / hr
    50 - 249
    New Castle, DE

    Services provided

    20% Web Development
    20% Branding
    20% E-Commerce Development +2
    20% Mobile App Development
    20% Search Engine Optimization

    Focus Areas

    20% JavaScript
    20% HTML5
    20% PHP +2
    20% Redux
    20% jquery

    EasyComm Innovations is a full-service IT and digital solutions company headquartered in New Castle, Delaware, with a dedicated development center in Indore, India. Founded in 2015, we bring

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  • Faro Development Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Cluj-Napoca, Romania

    Services provided

    20% Web Development
    50% IT Managed Services
    20% Custom Software Development +1
    10% Branding

    Focus Areas

    20% JavaScript
    20% AJAX
    20% Apex +2
    20% Java
    20% Python

    Faro Development is an IT managed services company. Established in 2007, the firm is headquartered in Cluj-Napoca, Romania. Their team focuses on IT managed services and Custom Software Development.

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  • RL System Designer Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    Freelancer
    Rosario, Argentina

    Services provided

    50% Web Development
    50% Mobile App Development

    Focus Areas

    30% JavaScript
    40% PHP
    30% XML

    RL System Designer is a Rosario, Argentina-based application development company and web development company. The team focuses on Mobile App Development and Web Development.

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  • iT2 Limited Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Eastwood, England

    Services provided

    20% Web Development
    80% IT Managed Services

    Focus Areas

    20% JavaScript
    20% ASP.NET
    20% Java +2
    20% Python
    20% Swift

    IT managed services company iT2 Limited focuses on IT managed services and Web Development. They were established in 1998.

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  • Synergy Media Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Nottingham, England

    Services provided

    20% Web Development
    30% Search Engine Optimization
    30% Social Media Marketing +1
    20% Web Design

    Focus Areas

    20% JavaScript
    20% Java
    20% Perl +2
    20% Python
    20% Swift

    Synergy Media is a midsize SEO agency founded in 2008. Their team provides Search Engine Optimization and Social Media Marketing.

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  • Digital Plus 24x7 Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    West Bridgford, England

    Services provided

    20% Web Development
    20% Content Marketing
    20% Email Marketing +2
    20% Social Media Marketing
    20% Web Design

    Focus Areas

    20% JavaScript
    20% ASP.NET
    20% Java +2
    20% Perl
    20% Python

    Content Marketing company Digital Plus 24x7 was founded in 2016. The firm offers Content Marketing and Email Marketing.

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  • KTBO Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Ciudad de México, Mexico

    Services provided

    20% Web Development
    20% Advertising
    20% Content Marketing +2
    20% Digital Strategy
    20% Social Media Marketing

    Focus Areas

    20% JavaScript
    40% AJAX
    20% Java +1
    20% PHP

    KTBO is an Advertising company. The team is in Ciudad de México, Mexico, and their services include Advertising and Content Marketing.

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  • Total Design Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Amsterdam, Netherlands

    Services provided

    10% Web Development
    30% Branding
    20% Graphic Design +2
    20% UX/UI Design
    20% Web Design

    Focus Areas

    30% JavaScript
    30% AJAX
    20% PHP +1
    20% Swift

    Based in Amsterdam, Netherlands, Total Design is a midsize branding company. Their services include Branding and UX/UI Design.

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  • Rachip Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Bnei Brak, Israel

    Services provided

    30% Web Development
    40% Custom Software Development
    30% Mobile App Development

    Focus Areas

    10% JavaScript
    10% AJAX
    10% ASP +7
    10% ASP.NET
    10% C
    10% C#
    10% C++
    10% Java
    10% PHP
    10% Perl

    Rachip, a midsize software development company, is headquartered in Bnei Brak, Israel. Their services include Custom Software Development and Mobile App Development.

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  • Fenixo Studio Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    Freelancer
    Bari, Italy

    Services provided

    30% Web Development
    40% Web Design
    10% Advertising +2
    10% Pay Per Click
    10% Search Engine Optimization

    Focus Areas

    50% JavaScript
    50% Java

    Fenixo Studio is a web design agency. Established in 2008, the team provides Web Design and Web Development.

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  • DevCare Solutions Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Columbus, OH

    Services provided

    20% Web Development
    20% Cloud Consulting & SI
    20% IT Strategy Consulting +2
    20% Mobile App Development
    20% Web Design

    Focus Areas

    20% JavaScript
    20% AJAX
    20% ASP.NET +2
    20% Java
    20% PHP

    DevCare Solutions is a cloud consulting & SI company. Established in 2005, the firm is based in Columbus, Ohio. Their services include cloud consulting & SI and IT strategy consulting.

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  • Adil HL Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    Freelancer
    Aït Ourir, Morocco

    Services provided

    25% Web Development
    20% E-Commerce Development
    20% Mobile App Development +2
    20% Web Design
    15% Application Management & Support

    Focus Areas

    10% JavaScript
    25% C
    15% Python +5
    10% AJAX
    10% Ember.js
    10% PHP
    10% Typescript
    10% Visual Basic

    Launched in 2014, Adil HL is a small website development company. Their team provides Web Development and Web Design.

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  • Jeff Smith Logotype

    Jeff Smith

    Not yet reviewed

    Undisclosed
    Undisclosed
    Freelancer

    Services provided

    50% Web Development
    50% Web Design

    Focus Areas

    30% JavaScript
    30% PHP
    30% Python +1
    10% SQL

    Jeff Smith, a web design agency and website development company, was established in 2003. The agency specializes in Web Design and Web Development.

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  • Crafters Digital Agency Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    Freelancer
    Esch-sur-Alzette, Luxembourg

    Services provided

    20% Web Development
    20% Branding
    20% Digital Strategy +4
    10% E-Commerce Development
    10% Low/No Code Development
    10% Search Engine Optimization
    10% Social Media Marketing

    Focus Areas

    15% JavaScript
    20% HTML5
    20% PHP +5
    10% Java
    10% Kotlin
    10% SQL
    10% Swift
    5% C++

    Crafters Digital Agency is a web development company. Established in 2017, the team specializes in Web Development and Branding.

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  • Imagynix Logotype

    Imagynix

    Not yet reviewed

    $1,000+
    < $25 / hr
    Freelancer

    Services provided

    20% Web Development
    20% Branding
    20% Digital Strategy +2
    20% Mobile App Development
    20% Video Production

    Focus Areas

    15% JavaScript
    25% HTML5
    20% Redux +3
    15% AJAX
    15% PHP
    10% Kotlin

    Imagynix is a branding company founded in 2023. Their team specializes in Branding and Digital Strategy.

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  • Florent_G Logotype

    Not yet reviewed

    Undisclosed
    $50 - $99 / hr
    Freelancer
    Montréal, Canada

    Services provided

    15% Web Development
    35% Ecommerce Marketing
    35% Search Engine Optimization +1
    15% Conversion Optimization

    Focus Areas

    20% JavaScript
    50% HTML5
    20% Python +1
    10% Ruby

    Florent_G is a SEO services firm. Launched in 2023, their team provides Search Engine Optimization and Ecommerce Marketing.

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  • Long Lake Technologies Logotype

    Long Lake Technologies

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    Freelancer

    Services provided

    20% Web Development
    25% AI Development
    15% Generative AI +3
    15% IT Staff Augmentation
    15% Low/No Code Development
    10% Custom Software Development

    Focus Areas

    15% JavaScript
    35% Python
    15% SQL +5
    10% Java
    10% Typescript
    5% C++
    5% HTML5
    5% Kotlin

    Long Lake Technologies, a website development firm, was launched in 2022. The team provides Web Development and Artificial Intelligence.

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  • Akshay p Logotype

    Akshay p

    Not yet reviewed

    Undisclosed
    Undisclosed
    Freelancer

    Services provided

    10% Web Development
    20% Content Marketing
    20% Email Marketing +3
    20% Search Engine Optimization
    20% Social Media Marketing
    10% Low/No Code Development

    Focus Areas

    25% JavaScript
    70% HTML5
    5% jquery

    Akshay p is a social media marketing firm. They are located in Ramanattukara, India and have small team of experts. Their services include Social Media Marketing and Content Marketing.

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  • NVISH Solutions Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Newark, CA

    Services provided

    30% Web Development
    30% Other Digital Marketing
    20% Staffing +2
    10% Mobile App Development
    10% Other IT Consulting and SI

    Focus Areas

    10% JavaScript
    35% PHP
    15% HTML5 +5
    10% Java
    10% Python
    10% SQL
    5% AJAX
    5% Other programming & scripting languages

    NVISH Solutions is an Other Digital Marketing company established in 2006. The firm provides Other Digital Marketing and Web Development, and is midsize.

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  • American Digital Agency Logotype

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    50 - 249
    Ashburn, VA

    Services provided

    30% Web Development
    30% Web Design
    20% E-Commerce Development +1
    20% Mobile App Development

    Focus Areas

    10% JavaScript
    20% AJAX
    20% Ember.js +3
    20% Ruby
    20% Visual Basic
    10% Other programming & scripting languages

    Launched in 2022, American Digital Agency is a web design agency. Their team offers Web Design and Web Development.

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  • Webackit Solutions Logotype

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    Freelancer
    București, Romania

    Services provided

    30% Web Development
    50% Custom Software Development
    10% AI Development +2
    5% Graphic Design
    5% Web Design

    Focus Areas

    50% JavaScript
    25% PHP
    10% HTML5 +2
    10% Python
    5% jquery

    Custom software development firm Webackit Solutions was founded in 2021. The team offers Custom Software Development and Web Development and is located in București, Romania.

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  • PLETHORA IT & HR SOLUTIONS Logotype

    Not yet reviewed

    $1,000+
    < $25 / hr
    50 - 249
    Ahmedabad, India

    Services provided

    20% Web Development
    20% Mobile App Development
    20% Pay Per Click +2
    20% Search Engine Optimization
    20% Social Media Marketing

    Focus Areas

    20% JavaScript
    20% AJAX
    20% HTML5 +2
    20% PHP
    20% jquery

    PLETHORA IT & HR SOLUTIONS, a social media marketing firm, is based in Ahmedabad, India. Established in 2018, the team offers Social Media Marketing and Search Engine Optimization.

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  • Pointlab Software Logotype

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    50 - 249
    Houston, TX

    Services provided

    20% Web Development
    25% Custom Software Development
    20% Mobile App Development +3
    15% Application Testing
    10% CRM Consulting and SI
    10% Low/No Code Development

    Focus Areas

    20% JavaScript
    20% HTML5
    20% PHP +2
    20% Typescript
    20% jquery

    Headquartered in Houston, Texas and Mississauga, Canada, Pointlab Software is a custom software development company. Their services include Custom Software Development and Web Development.

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  • Mobify Logotype

    Mobify

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    50 - 249

    Services provided

    30% Web Development
    30% Mobile App Development
    20% Custom Software Development +4
    10% Low/No Code Development
    4% API Development
    3% Application Management & Support
    3% Application Testing

    Focus Areas

    10% JavaScript
    50% Python
    10% HTML5 +3
    10% Kotlin
    10% Other programming & scripting languages
    10% SQL

    Mobify is a custom software development company. Established in 2016, the company is located in Islamabad, Pakistan. Their team focuses on Custom Software Development and Web Development.

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  • noktaGO Digital Logotype

    noktaGO Digital

    Not yet reviewed

    $1,000+
    < $25 / hr
    Freelancer

    Services provided

    60% Web Development
    20% Web Design
    10% Graphic Design +1
    10% Social Media Marketing

    Focus Areas

    30% JavaScript
    35% HTML5
    35% PHP

    Established in 2022, noktaGO Digital is a small web development firm. Their services include Web Development and Web Design.

    Read more
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  • InnoIT Consulting Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Barcelona, Spain

    Services provided

    20% Web Development
    20% AI Development
    20% Application Testing +3
    20% BI & Big Data Consulting & SI
    10% Cloud Consulting & SI
    10% Mobile App Development

    Focus Areas

    20% JavaScript
    20% Java
    20% Kotlin +4
    10% Elixir
    10% PHP
    10% SQL
    10% Swift

    InnoIT Consulting is a big data company. Their team is located in Barcelona, Spain. The firm specializes in BI & big data consulting & SI and Web Development.

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  • Shivohm Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    50 - 249
    Gandhinagar, India

    Services provided

    20% Web Development
    20% Pay Per Click
    20% Search Engine Optimization +3
    20% Social Media Marketing
    10% Low/No Code Development
    10% Web Design

    Focus Areas

    20% JavaScript
    30% ASP.NET
    20% Python +2
    20% SQL
    10% C

    Shivohm, a social media marketing firm, was established in 2018. Located in Gandhinagar, India, the team offers Social Media Marketing and Search Engine Optimization.

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  • Pixelpii Logotype

    Not yet reviewed

    Undisclosed
    < $25 / hr
    50 - 249
    West Melbourne, FL

    Services provided

    20% Web Development
    20% Mobile App Development
    10% AI Development +5
    10% E-Commerce Development
    10% Graphic Design
    10% Low/No Code Development
    10% Search Engine Optimization
    10% UX/UI Design

    Focus Areas

    20% JavaScript
    50% PHP
    10% ASP.NET +2
    10% HTML5
    10% jquery

    Website development firm Pixelpii was established in 2023. The midsize team provides Web Development and Mobile App Development.

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  • UXCentury Logotype

    Not yet reviewed

    $25,000+
    $50 - $99 / hr
    50 - 249
    Yerevan, Armenia

    Services provided

    25% Web Development
    25% Mobile App Development
    20% AI Development +2
    20% Custom Software Development
    10% API Development

    Focus Areas

    15% JavaScript
    15% Java
    15% PHP +5
    15% Python
    15% SQL
    15% Typescript
    5% C#
    5% C++

    UXCentury is a midsize web development firm located in Yerevan, Armenia. The team provides Web Development and Mobile App Development.

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  • Code with NAB Logotype

    Code with NAB

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    Freelancer

    Services provided

    80% Web Development
    10% API Development
    10% E-Commerce Development

    Focus Areas

    30% JavaScript
    50% Python
    10% PHP +1
    10% Typescript

    Code with NAB is a web development company. The Dubai, United Arab Emirates-based agency was founded in 2024. Their team offers Web Development and E-Commerce Development.

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  • SEO Notch Logotype

    Not yet reviewed

    $25,000+
    $150 - $199 / hr
    50 - 249
    Chicago, IL

    Services provided

    15% Web Development
    45% Search Engine Optimization
    15% Pay Per Click +2
    15% Social Media Marketing
    10% Web Design

    Focus Areas

    25% JavaScript
    15% PHP
    15% SQL +10
    12% HTML5
    5% AJAX
    5% Python
    5% Redux
    5% Typescript
    4% jquery
    3% ASP.NET
    3% Java
    2% Kotlin
    1% Go

    In Chicago, Illinois, SEO Notch is a SEO agency. They provide Search Engine Optimization and Web Development and were launched in 2022.

    Read more
    View Profile
  • SoftCore Logotype

    SoftCore

    Not yet reviewed

    $25,000+
    $100 - $149 / hr
    50 - 249

    Services provided

    20% Web Development
    30% Custom Software Development
    20% Digital Strategy +2
    15% Search Engine Optimization
    15% Web Design

    Focus Areas

    20% JavaScript
    40% SQL
    25% PHP +1
    15% HTML5

    SoftCore, a custom software development company, specializes in Custom Software Development and Digital Strategy. The firm is in Dhaka, Bangladesh.

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  • UNILAW Technologies Logotype

    Not yet reviewed

    Undisclosed
    $25 - $49 / hr
    50 - 249
    Newark, NJ

    Services provided

    20% Web Development
    20% Custom Software Development
    20% ERP Consulting and SI +3
    20% IT Managed Services
    10% Low/No Code Development
    10% Web Design

    Focus Areas

    20% JavaScript
    40% Java
    20% HTML5 +1
    20% Python

    Established in 2021, UNILAW Technologies, a midsize web design agency, is located in Newark, New Jersey and Kochi, India. Their team specializes in Web Design and ERP consulting and SI.

    Read more
    $9,999 Startups, small businesses, nonprofits. $16,999 Growing businesses, enhancing web experience. $24,999 Innovative SMBs and Enterprises.

    Customised Web Development

    View Packages
    View Profile
  • Tekwalks Logotype

    Tekwalks

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    50 - 249

    Services provided

    10% Web Development
    10% Content Marketing
    10% E-Commerce Development +9
    10% Ecommerce Marketing
    10% IT Managed Services
    10% Mobile App Development
    10% Search Engine Optimization
    10% Social Media Marketing
    5% AI Consulting
    5% Application Management & Support
    5% Branding
    5% Pay Per Click

    Focus Areas

    30% JavaScript
    25% HTML5
    20% PHP +2
    15% SQL
    10% Visual Basic

    Located in Nairobi, Kenya and NY, Arkansas, Tekwalks is a social media marketing firm. They specialize in Social Media Marketing and Content Marketing and were launched in 2019.

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At Clutch, we believe trust is the foundation of every business relationship. Our mission is to help buyers make confident, data-backed decisions informed by real client experiences.

Every review on Clutch undergoes a rigorous, human-led verification process to make sure it’s valid. Our team of specialists confirms the identity of each reviewer, ensures the project is legitimate, and only publishes reviews that meet our strict criteria.

Verification doesn’t stop at the point of publication. Our Trust & Safety team routinely audits older reviews against our guidelines. When reviews fall short of our standards, we remove them.

We evaluate service providers using a structured methodology that combines:

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This data powers tools like the Leaders Matrix, which helps you compare agencies directly. Our research team curates rankings by weighing verified reviews most heavily, so the most trusted and experienced providers rise to the top.

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Ability to deliver
Focus
Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 ImageX
2 xfive
3 GeekyAnts
4 Flowout
5 Brainhub
6 The Software House
7 PowerGate Software
8 HTMLPanda
9 FocusReactive
10 Arcanys
11 WPWeb Infotech
12 Softonix
13 PopArt Studio
14 Lizard Global
15 Experion Technologies

List of the Top 15 JavaScript Development Companies

  1. ImageX Logotype

    ImageX

    $75,000+
    $100 - $149 / hr
    50 - 249
    Vancouver, Canada

    Ability to deliver

    38.7/40.0
    20/20 Reviews
    10/10 Clients & Experience
    8.7/10 Market Presence

    Service focus

    90% Web Development
    50% JavaScript
    10% Other
    View Profile Visit Website
  2. xfive Logotype

    xfive

    $25,000+
    $50 - $99 / hr
    50 - 249
    Kraków, Poland

    Ability to deliver

    35.9/40.0
    19/20 Reviews
    10/10 Clients & Experience
    6.9/10 Market Presence

    Service focus

    60% Web Development
    50% JavaScript
    40% Other
    View Profile Visit Website
  3. GeekyAnts Logotype

    GeekyAnts

    $10,000+
    $25 - $49 / hr
    250 - 999
    Bengaluru, India

    Ability to deliver

    37.2/40.0
    20/20 Reviews
    10/10 Clients & Experience
    7.2/10 Market Presence

    Service focus

    20% Web Development
    40% JavaScript
    80% Other
    View Profile Visit Website
  4. Flowout Logotype

    Flowout

    $5,000+
    $50 - $99 / hr
    50 - 249
    Maribor, Slovenia

    Ability to deliver

    35.1/40.0
    20/20 Reviews
    10/10 Clients & Experience
    5.1/10 Market Presence

    Service focus

    40% Web Development
    100% JavaScript
    60% Other
    View Profile Visit Website
  5. Brainhub Logotype

    Brainhub

    $50,000+
    $50 - $99 / hr
    50 - 249
    Gliwice, Poland

    Ability to deliver

    34.1/40.0
    18.4/20 Reviews
    10/10 Clients & Experience
    5.7/10 Market Presence

    Service focus

    45% Web Development
    75% JavaScript
    55% Other
    View Profile Visit Website
  6. The Software House Logotype

    The Software House

    $25,000+
    $50 - $99 / hr
    50 - 249
    Gliwice, Poland

    Ability to deliver

    34.5/40.0
    18.8/20 Reviews
    10/10 Clients & Experience
    5.7/10 Market Presence

    Service focus

    40% Web Development
    60% JavaScript
    60% Other
    View Profile Visit Website
  7. PowerGate Software Logotype

    PowerGate Software

    $10,000+
    < $25 / hr
    250 - 999
    Hanoi, Vietnam

    Ability to deliver

    35.9/40.0
    18.8/20 Reviews
    10/10 Clients & Experience
    7.1/10 Market Presence

    Service focus

    30% Web Development
    21% JavaScript
    70% Other
    View Profile Visit Website
  8. HTMLPanda Logotype

    HTMLPanda

    $1,000+
    < $25 / hr
    250 - 999
    Walpole, MA

    Ability to deliver

    32.8/40.0
    16.2/20 Reviews
    10/10 Clients & Experience
    6.6/10 Market Presence

    Service focus

    40% Web Development
    35% JavaScript
    60% Other
    View Profile Visit Website
  9. FocusReactive Logotype

    FocusReactive

    $10,000+
    $50 - $99 / hr
    10 - 49
    London, England

    Ability to deliver

    34.8/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    6.2/10 Market Presence

    Service focus

    50% Web Development
    90% JavaScript
    50% Other
    View Profile Visit Website
  10. Arcanys Logotype

    Arcanys

    $100,000+
    $25 - $49 / hr
    250 - 999
    Cebu City, Philippines

    Ability to deliver

    35.6/40.0
    20/20 Reviews
    10/10 Clients & Experience
    5.6/10 Market Presence

    Service focus

    30% Web Development
    20% JavaScript
    70% Other
    View Profile Visit Website
  11. WPWeb Infotech Logotype

    WPWeb Infotech

    $25,000+
    < $25 / hr
    250 - 999
    Ahmedabad, India

    Ability to deliver

    37/40.0
    19.6/20 Reviews
    10/10 Clients & Experience
    7.4/10 Market Presence

    Service focus

    45% Web Development
    10% JavaScript
    55% Other
    View Profile Visit Website
  12. Softonix Logotype

    Softonix

    $5,000+
    $25 - $49 / hr
    50 - 249
    Warszawa, Poland

    Ability to deliver

    32.3/40.0
    17.2/20 Reviews
    10/10 Clients & Experience
    5.1/10 Market Presence

    Service focus

    70% Web Development
    50% JavaScript
    30% Other
    View Profile Visit Website
  13. PopArt Studio Logotype

    PopArt Studio

    $5,000+
    $50 - $99 / hr
    50 - 249
    Chicago, IL

    Ability to deliver

    35.6/40.0
    19.6/20 Reviews
    10/10 Clients & Experience
    6/10 Market Presence

    Service focus

    35% Web Development
    40% JavaScript
    65% Other
    View Profile Visit Website
  14. Lizard Global Logotype

    Lizard Global

    $10,000+
    $50 - $99 / hr
    50 - 249
    Amsterdam, Netherlands

    Ability to deliver

    34.9/40.0
    19.8/20 Reviews
    10/10 Clients & Experience
    5.1/10 Market Presence

    Service focus

    30% Web Development
    70% JavaScript
    70% Other
    View Profile Visit Website
  15. Experion Technologies Logotype

    Experion Technologies

    $10,000+
    $25 - $49 / hr
    1,000 - 9,999
    Plano, TX

    Ability to deliver

    33.6/40.0
    16.8/20 Reviews
    10/10 Clients & Experience
    6.8/10 Market Presence

    Service focus

    20% Web Development
    25% JavaScript
    80% Other
    View Profile Visit Website
  16. INOXOFT Logotype

    INOXOFT

    $25,000+
    $25 - $49 / hr
    50 - 249
    Newark, DE

    Ability to deliver

    35.5/40.0
    18.8/20 Reviews
    10/10 Clients & Experience
    6.7/10 Market Presence

    Service focus

    40% Web Development
    35% JavaScript
    60% Other
    View Profile Visit Website
  17. Cleveroad Logotype

    Cleveroad

    $10,000+
    $25 - $49 / hr
    250 - 999
    New York, NY

    Ability to deliver

    36.2/40.0
    20/20 Reviews
    10/10 Clients & Experience
    6.2/10 Market Presence

    Service focus

    30% Web Development
    15% JavaScript
    70% Other
    View Profile Visit Website
  18. Povio Logotype

    Povio

    $10,000+
    $50 - $99 / hr
    50 - 249
    San Francisco, CA

    Ability to deliver

    32.6/40.0
    18.8/20 Reviews
    8.3/10 Clients & Experience
    5.5/10 Market Presence

    Service focus

    55% Web Development
    45% JavaScript
    45% Other
    View Profile Visit Website
  19. Sigma Software Group Logotype

    Sigma Software Group

    $50,000+
    $50 - $99 / hr
    1,000 - 9,999
    L'viv, Ukraine

    Ability to deliver

    36.3/40.0
    17.6/20 Reviews
    10/10 Clients & Experience
    8.8/10 Market Presence

    Service focus

    15% Web Development
    18% JavaScript
    85% Other
    View Profile Visit Website
  20. Xmartlabs Logotype

    Xmartlabs

    $10,000+
    $50 - $99 / hr
    50 - 249
    Montevideo, Uruguay

    Ability to deliver

    33.8/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    5.2/10 Market Presence

    Service focus

    50% Web Development
    35% JavaScript
    50% Other
    View Profile Visit Website
  21. Incora Logotype

    Incora

    $25,000+
    $25 - $49 / hr
    50 - 249
    L'viv, Ukraine

    Ability to deliver

    33.1/40.0
    17.8/20 Reviews
    10/10 Clients & Experience
    5.3/10 Market Presence

    Service focus

    40% Web Development
    50% JavaScript
    60% Other
    View Profile Visit Website
  23. Adchitects Logotype

    Adchitects

    $25,000+
    $50 - $99 / hr
    10 - 49
    Poznań, Poland

    Ability to deliver

    33.8/40.0
    17/20 Reviews
    10/10 Clients & Experience
    6.8/10 Market Presence

    Service focus

    50% Web Development
    60% JavaScript
    50% Other
    View Profile Visit Website
  24. Techuz InfoWeb Pvt. Ltd. Logotype

    Techuz InfoWeb Pvt. Ltd.

    $5,000+
    < $25 / hr
    50 - 249
    Ahmedabad, India

    Ability to deliver

    31.9/40.0
    16.4/20 Reviews
    10/10 Clients & Experience
    5.5/10 Market Presence

    Service focus

    60% Web Development
    45% JavaScript
    40% Other
    View Profile Visit Website
  25. SpdLoad Logotype

    SpdLoad

    $50,000+
    $25 - $49 / hr
    50 - 249
    Kharkiv, Ukraine

    Ability to deliver

    31.9/40.0
    16.2/20 Reviews
    10/10 Clients & Experience
    5.7/10 Market Presence

    Service focus

    45% Web Development
    50% JavaScript
    55% Other
    View Profile Visit Website
  26. XWP Logotype

    XWP

    $50,000+
    $150 - $199 / hr
    50 - 249
    New York, NY

    Ability to deliver

    31.9/40.0
    15.8/20 Reviews
    10/10 Clients & Experience
    6.1/10 Market Presence

    Service focus

    60% Web Development
    45% JavaScript
    40% Other
    View Profile Visit Website
  27. Toptal Logotype

    Toptal

    $50,000+
    $100 - $149 / hr
    1,000 - 9,999
    San Francisco, CA

    Ability to deliver

    33.9/40.0
    17.2/20 Reviews
    9.9/10 Clients & Experience
    6.8/10 Market Presence

    Service focus

    15% Web Development
    25% JavaScript
    85% Other
    View Profile Visit Website
  28. unicrew Logotype

    unicrew

    $10,000+
    $25 - $49 / hr
    50 - 249
    Kraków, Poland

    Ability to deliver

    33.8/40.0
    18.8/20 Reviews
    10/10 Clients & Experience
    5/10 Market Presence

    Service focus

    30% Web Development
    50% JavaScript
    70% Other
    View Profile Visit Website
  29. Konstant Infosolutions Logotype

    Konstant Infosolutions

    $5,000+
    $25 - $49 / hr
    250 - 999
    Jaipur, India

    Ability to deliver

    37.4/40.0
    20/20 Reviews
    10/10 Clients & Experience
    7.4/10 Market Presence

    Service focus

    10% Web Development
    25% JavaScript
    90% Other
    View Profile Visit Website
  30. Vardot Logotype

    Vardot

    $25,000+
    $100 - $149 / hr
    50 - 249
    Santa Clara, CA

    Ability to deliver

    35.1/40.0
    17.8/20 Reviews
    10/10 Clients & Experience
    7.3/10 Market Presence

    Service focus

    60% Web Development
    20% JavaScript
    40% Other
    View Profile Visit Website

Top JavaScript Development Agencies

A JavaScript development company designs, builds, and maintains software products that rely on JavaScript across the stack. Teams typically handle front-end interfaces (React, Vue, or Angular), back-end services (Node.js, Express, NestJS), and database integrations. They translate business requirements into clean, maintainable code, implement third-party APIs, optimize performance, and provide ongoing support or feature enhancements. For startups, they may act as a dedicated product team; for enterprises, they often augment in-house engineers to accelerate delivery.

Most agencies bundle multiple offerings so clients can access full product life-cycle support:

  • Discovery workshops & technical consulting
  • UI/UX design and prototyping
  • Front-end SPA or PWA development
  • Server-side development with Node.js or Deno
  • API design, GraphQL, and microservices architecture
  • QA automation & performance testing
  • DevOps, CI/CD, and cloud deployment (AWS, Azure, GCP)
  • Post-launch maintenance and feature sprints

Some firms specialize in niches such as ecommerce storefronts, real-time dashboards, or IoT applications built with JavaScript frameworks like Next.js or Svelte.

Clutch data shows project budgets range widely:

  • MVP or small web app - $15,000–$50,000
  • Mid-size product build - $50,000–$200,000
  • Enterprise-grade platform - $200,000–$1M+ | Hourly rates usually fall between $50–$149 depending on agency location, seniority, and specialization. Expect higher rates for U.S.-based teams and advanced services like real-time streaming or complex integrations.

  • Align expertise: Verify experience with your required stack (e.g., React Native, TypeScript, serverless).
  • Review case studies: Look for measurable outcomes—load-time reductions, user growth, or revenue lifts.
  • Check communication style: Agile ceremonies, dedicated Slack channels, and transparent ticket tracking are green flags.
  • Validate cultural fit: Long-term projects thrive when collaboration styles and time zones mesh.
  • Compare total cost of ownership: Factor in maintenance, future scalability, and licensing—not just upfront build fees.

Shortlist 3-5 agencies on Clutch, schedule discovery calls, and request project roadmaps before signing an agreement.

  • Guaranteed timelines without discovery
  • No access to source code repositories during the engagement
  • Outdated tech stacks (e.g., jQuery-only solutions for modern SPAs)
  • Low developer retention or high turnover
  • Vague pricing models or hidden fees

If an agency dismisses code reviews, ignores testing, or refuses to provide client references, proceed with caution

  • Which JavaScript frameworks do you specialize in, and why?
  • Can you walk me through a recent project with similar complexity?
  • How do you ensure code quality—linting, peer reviews, automated tests?
  • What is your approach to scalability and performance optimization?
  • How will we communicate and track progress (tools, meeting cadence)?
  • Who owns the intellectual property and source code upon project completion?

Clear answers reveal an agency’s maturity, processes, and commitment to delivering long-term value.

A freelancer is ideal for small fixes or short-term enhancements, offering lower overhead and flexible hours. Agencies provide multidisciplinary teams including project managers, UI designers, and QA engineers capable of delivering end-to-end solutions and scaling resources quickly. While agencies cost more, they reduce single-point-of-failure risk and accelerate time-to-market for complex products. How do JavaScript firms measure ROI? Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.

Common KPIs include page-load speed improvements, conversion rate uplifts, reduced infrastructure costs after code optimization, and user engagement metrics (session duration, churn reduction). Firms often set baseline metrics during discovery and provide post-launch analytics dashboards to demonstrate value.

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