Top Application Modernization Services
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$10,000+$150 - $199 / hr2 - 9Mission Viejo, CA
Services provided
See all 3 projectsCalibec is a software development company specializing in modernizing and upgrading applications. The reviews are overwhelmingly positive, with 100% of clients noting timely delivery, responsiveness, and effective communication. Clients appreciate Calibec's innovative approach and project management skills, highlighting their ability to enhance user engagement and provide valuable suggestions. There are no reported areas for improvement.
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$10,000+$100 - $149 / hr10 - 49Berlin, Germany
Services provided
See all 3 projectsBananapie GmbH is a Flutter development company praised for its exceptional communication and teamwork. The reviews consistently highlight their reliable delivery of high-quality features and effective remote collaboration. With 100% positive feedback, clients appreciate their ability to integrate seamlessly into existing teams and their openness to innovative problem-solving approaches.
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$5,000+$25 - $49 / hr50 - 249Bengaluru, India
Services provided
See all 7 projectsYellowchalk Design is a UI/UX design studio known for creating intuitive and visually appealing user interfaces. Across reviews, clients emphasize their expertise, commitment, and flexibility, with 100% of reviewers expressing satisfaction with their work and highlighting their effective communication and problem-solving skills. A notable 80% of reviewers commend the team's responsiveness and dedication to exceeding expectations, often mentioning the active involvement of the company's founders.
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$1,000+$25 - $49 / hr50 - 249Seattle, WA
Services provided
See all 5 projectsNTSprint LLC is a software development firm specializing in custom web application development and enhancement. Based on reviews, 100% of clients praise their timely delivery, effective communication, and alignment with client values. Notably, they improved software accuracy by 25% and increased speed by 3,000%, demonstrating substantial technical proficiency and project success.
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$10,000+Undisclosed10 - 49
Services provided
See all 13 projectsSitePen is a company specializing in Enterprise Application Modernization services, offering solutions such as software and platform modernization. Clients consistently praise their professional project management and effective communication, with 100% of reviewers noting timely delivery and responsiveness to client needs. Their technical expertise and collaborative approach were highlighted as significant strengths.
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$50,000+$100 - $149 / hr10 - 49Philadelphia, PA
Services provided
See all 9 projectsOpenForge is a mobile app development company specializing in hybrid app solutions using platforms like Ionic. Across numerous client reviews, OpenForge is consistently praised for their expertise, communication, and project management skills, with over 90% of reviews highlighting their responsiveness and ability to meet deadlines. Clients frequently commend their collaborative approach, thoroughness in testing, and commitment to delivering high-quality, functional products.
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$10,000+$50 - $99 / hr10 - 49Sacramento, CA
Services provided
See all 11 projectsPrestige Development Group is a recruitment and talent acquisition company specializing in sourcing candidates for technical and senior roles across various industries. The company consistently receives positive feedback, with approximately 100% of reviewers expressing satisfaction with their professionalism, effective workflow, and ability to meet challenging hiring requirements in a timely manner. Their adaptability and commitment to understanding client needs are frequently highlighted as key strengths.
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$25,000+$50 - $99 / hr50 - 249AAS, Argentina
Services provided
See all 9 projectsGlobal Task is a versatile software development company known for offering tailored IT solutions, from educational platforms to credit card control systems and blockchain integrations. The company consistently receives high praise for its project management, transparency, and quality of deliverables, with 100% of reviewers noting their impressive flexibility and commitment to client goals. Reviewers also highlight Global Task's strong team dynamics and cultural fit, making them a reliable partner for diverse technological needs.
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$5,000+$25 - $49 / hr50 - 249Kakkanad, India
Services provided
See all 18 projectsSayOne Technologies is a versatile software development company specializing in e-commerce, mobile app, and web development services, with a strong foundation in technologies like Python and Django. Reviews reveal 100% positive feedback, emphasizing their effective communication, timely delivery, technical expertise, and client satisfaction. Approximately 30% of reviewers appreciate their project management skills, highlighting their dedication to meeting expectations and openness to feedback.
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$10,000+$25 - $49 / hr10 - 49L'viv, Ukraine
Services provided
See all 6 projectsRocket Harbor is a technology solutions company specializing in custom software development, including DevOps, web, iOS, and Android development, along with UX/UI design and API solutions. Consistently praised for their professionalism, adaptability, and expertise, 100% of reviews highlight their reliability in meeting deadlines and budgets. Clients appreciate their effective communication and ability to deliver high-quality results, with no significant areas for improvement noted.
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$5,000+$25 - $49 / hr10 - 49Noida, India
Services provided
See all 2 projectsGrepix Infotech Pvt. Ltd. is a software development company specializing in custom app development, with a focus on backend solutions. The company receives consistently positive feedback, with 100% of reviewers praising their project management skills and timely delivery. Clients commend their honesty and quality deliverables, indicating high satisfaction and ongoing partnerships.
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$10,000+$50 - $99 / hr10 - 49Kraków, Poland
Services provided
See all 10 projectsScore Digital is a versatile software development company specializing in creating mobile applications, web applications, and custom ERP systems. Clients commend their strong project management skills, with 100% of reviews highlighting effective communication and timely delivery. Reviewers appreciate their ability to understand client needs, as noted by 86% of the feedback, and their adeptness in handling complex projects within budget constraints. While services are occasionally deemed costly, the quality and professionalism they provide are consistently praised.
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$25,000+$25 - $49 / hr10 - 49Burgas, Bulgaria
Services provided
See all 2 projects42px is a software development company specializing in front-end development with expertise in React and Typescript. The company consistently meets client expectations, with 100% of reviewers noting successful project outcomes such as timely delivery and bug-free implementations. Clients praise their agile project management approach, highlighting seamless integration with existing teams and effective communication throughout the project lifecycle.
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$5,000+$25 - $49 / hr10 - 49
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See all 2 projectsElanine Creatives is a web development firm praised for its strategic implementation and exceptional project management skills. All reviews reflect positive feedback, highlighting their efficiency and partnership-oriented approach. Impressively, 100% of reviewers commend their proactive collaboration and dedication, resulting in enhanced community engagement and operational efficiency.
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$5,000+$25 - $49 / hr10 - 49
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See all 2 projectsQualitas IT LLC is a versatile software development company specializing in HR management tools and website development. Across reviews, clients commend their project management, with 100% praising their timeliness and quality. Notable highlights include seamless communication and creative input, proving integral to client successes. While some suggest expanding their technology portfolio, overall satisfaction remains high.
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Undisclosed$25 - $49 / hr50 - 249Yerevan, Armenia
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See all 3 projectsInomma is a mobile and web development company known for its comprehensive services, including app design, backend, and frontend development. Reviews indicate that approximately 100% of clients commend their professionalism, attention to detail, and adherence to timelines and budgets. Their result-oriented approach and clear communication consistently meet or exceed client expectations, with no significant areas for improvement noted by reviewers.
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$10,000+$25 - $49 / hr10 - 49
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See all 2 projectsMINT IT is a mobile app development company known for its expertise in delivering high-quality applications using technologies like Flutter, Node.js, and MongoDB. Clients consistently praise their effective communication, adherence to deadlines, and the smooth workflow they provide, with 100% of reviews highlighting their impressive team quality and process management.
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$5,000+$25 - $49 / hr10 - 49Chennai, India
Services provided
See all 8 projectsSiam Computing is a versatile technology services company specializing in web development, software development, and custom solutions, as highlighted by their engagement with diverse sectors, including healthcare, education, and real estate. The reviews demonstrate an 80% positive sentiment, with clients appreciating their professional project management and commitment to deadlines. Approximately 60% of reviewers commend Siam Computing's collaborative approach and technical expertise, indicating their capability to align with client values and project needs. Potential areas for improvement include enhancing resource transparency and refining communication processes.
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$5,000+$25 - $49 / hr50 - 249Ahmedabad, India
Services provided
See all 15 projectsTechnoBrains Business Solutions LLP is a versatile software development company specializing in mobile app development, UI/UX design, and web development. With 100% positive feedback, clients frequently commend their excellent project management, transparency, and ability to deliver high-quality projects on time. Approximately 85% of reviewers highlight their impressive communication and professional conduct, while 70% note their adaptability and alignment with client needs.
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$25,000+$100 - $149 / hr10 - 49Troy, NY
Services provided
See all 2 projectsGavant Software, Inc. is a software development company known for creating custom solutions tailored to industry-specific needs. Reviews highlight their expertise in developing complex inventory and management systems, with a focus on intuitive design and seamless integration. Clients praise their dedication and partnership approach, with 100% of reviewers noting their ability to enhance operational efficiency and exceed project expectations.
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$1,000+$25 - $49 / hr1,000 - 9,999Łódź, Poland
Services provided
See all 7 projectsTransition Technologies PSC is a versatile IT services company specializing in product lifecycle management (PLM), data migration, IoT solutions, and software development. The company is praised for its expertise, flexibility, and commitment to delivering projects on time and within budget. Approximately 85% of reviewers highlight their technical skills and problem-solving capabilities, though some note the need for more experienced staff due to rapid growth.
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$25,000+$50 - $99 / hr50 - 249Nicosia, Cyprus
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See all 19 projectsAimprosoft is a versatile IT outsourcing company that specializes in software development, offering services such as web and mobile application development, cloud solutions, and custom APIs. The company consistently receives positive feedback for its high-quality deliverables, effective project management, and swift staffing capabilities. Approximately 90% of reviewers highlight Aimprosoft's excellent communication and timely project delivery, with a notable emphasis on the quality and expertise of their developers.
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$10,000+$150 - $199 / hr10 - 49Roswell, GA
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See all 7 projectsSentry IT, LLC is a company specializing in Enterprise Application Modernization and IT Modernization services. With a remarkable 100% positive feedback rate, clients commend their exceptional project management, attention to detail, and commitment to success. Approximately 60% of reviewers highlight their transformative impact on operations, leading to improved efficiency and a competitive edge.
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$1,000+< $25 / hr10 - 49
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See all 2 projectsFlaminTech LLP is a web and application development company specializing in custom eCommerce solutions. Their client feedback is overwhelmingly positive, with reviewers appreciating their timely delivery and user-friendly UI. Notably, 100% of reviewers mentioned the outstanding quality of their deliverables, highlighting a commitment to excellence and customer satisfaction.
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$5,000+$25 - $49 / hr10 - 49Kyiv, Ukraine
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See all 5 projectsAltSolution is a versatile software development company specializing in CRM solutions, website development, and cloud-based systems. Clients consistently praise their project management, technical expertise, and dedication, with 100% expressing satisfaction with their deliverables. Notable strengths include their cost-effectiveness and proactive problem-solving abilities, although some clients suggest minor improvements in communication style.
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$10,000+$25 - $49 / hr10 - 49Dnipropetrovs'k, Ukraine
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See all 3 projectsUnicreo is a software development company specializing in creating web and app-based solutions, particularly using technologies like WebRTC, .NET, and Node.js. The company's reviews highlight a 100% satisfaction rate, with clients praising their dedication, flexibility, and strong analytical skills. Reviewers frequently note their ability to adapt to client needs, though some mention room for improvement in feedback openness and task complexity estimation.
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$25,000+$150 - $199 / hr2 - 9Orlando, FL
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See all 3 projectsGrata Software is a versatile software development company specializing in IT consulting, custom software development, and project management. The company maintains a strong reputation, with approximately 90% positive feedback emphasizing their responsiveness, technical expertise, and quality of work. Clients appreciate their ability to handle diverse projects and enhance system reliability, though some suggest improvements in project visibility and team availability.
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$25,000+$25 - $49 / hr250 - 999
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See all 1 projectsEvolve Blue is a web development and SEO company known for creating mobile-responsive websites and managing search engine optimization to improve client visibility. According to reviews, 100% of clients report increased business and satisfaction with their services, highlighting the team's patience, transparency, and effective communication. The company fosters ongoing relationships and delivers impactful results, with no reported areas for improvement.
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$25,000+Undisclosed10 - 49London, England
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See all 1 projectsAleios is a specialized company offering serverless solutions, notably using AWS, with a focus on re-platforming and content management system integrations. Reviews highlight their impressive and energetic approach, with 100% positive feedback emphasizing their confidence, timeliness, and effective communication. Their ability to work seamlessly with stakeholders has earned them significant trust and satisfaction.
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$10,000+$25 - $49 / hr2 - 9London, England
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See all 4 projectsInCode Systems is a web development company specializing in creating custom digital solutions, including UI/UX design, web development, and CRM integration. The reviews consistently highlight their professionalism, effective communication, and timely delivery, with 100% of reviewers noting satisfaction with their work and adaptability to project needs. Their pricing is also frequently praised as offering good value for cost.
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List of the Top 15 Legacy Modernization Services
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$25,000+$50 - $99 / hr250 - 999Miami, FL
Ability to deliver
35/40.019.6/20 Reviews10/10 Clients & Experience5.4/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$50,000+$50 - $99 / hr250 - 999Miami, FL
Ability to deliver
35.3/40.018.8/20 Reviews10/10 Clients & Experience6.5/10 Market PresenceService focus
25% Enterprise App Modernization75% Other -
$5,000+< $25 / hr1,000 - 9,999
Ability to deliver
31.9/40.016.6/20 Reviews10/10 Clients & Experience5.3/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$5,000+$50 - $99 / hr10 - 49Brno, Czech Republic
Ability to deliver
31.6/40.017.4/20 Reviews9.8/10 Clients & Experience4.4/10 Market PresenceService focus
60% Enterprise App Modernization40% Other -
$50,000+$50 - $99 / hr250 - 999Wrocław, Poland
Ability to deliver
31.3/40.015.8/20 Reviews10/10 Clients & Experience5.5/10 Market PresenceService focus
40% Enterprise App Modernization60% Other -
$10,000+< $25 / hr250 - 999Ahmedabad, India
Ability to deliver
38.1/40.020/20 Reviews10/10 Clients & Experience8.1/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$25,000+$25 - $49 / hr1,000 - 9,999Orlando, FL
Ability to deliver
36.6/40.020/20 Reviews10/10 Clients & Experience6.6/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$100,000+$150 - $199 / hr50 - 249Southborough, MA
Ability to deliver
30.2/40.015.8/20 Reviews10/10 Clients & Experience4.4/10 Market PresenceService focus
50% Enterprise App Modernization50% Other -
$25,000+$25 - $49 / hr250 - 999Jaipur, India
Ability to deliver
33.9/40.018.2/20 Reviews10/10 Clients & Experience5.7/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$100,000+$50 - $99 / hr1,000 - 9,999Oakland, CA
Ability to deliver
29.8/40.015.2/20 Reviews8.8/10 Clients & Experience5.9/10 Market PresenceService focus
45% Enterprise App Modernization55% Other -
$50,000+$50 - $99 / hr1,000 - 9,999New York, NY
Ability to deliver
35.7/40.020/20 Reviews10/10 Clients & Experience5.7/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
UndisclosedUndisclosed1,000 - 9,999Atlanta, GA
Ability to deliver
31.1/40.016/20 Reviews10/10 Clients & Experience5.1/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$10,000+$100 - $149 / hr250 - 999London, England
Ability to deliver
33/40.017.2/20 Reviews10/10 Clients & Experience5.8/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$50 - $99 / hr50 - 249San Francisco, CA
Ability to deliver
37/40.019.8/20 Reviews10/10 Clients & Experience7.2/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$50,000+$25 - $49 / hr250 - 999Toronto, Canada
Ability to deliver
32.9/40.016.6/20 Reviews10/10 Clients & Experience6.3/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Atlanta, GA
Ability to deliver
32.7/40.016.8/20 Reviews10/10 Clients & Experience5.9/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$50,000+$50 - $99 / hr1,000 - 9,999Kraków, Poland
Ability to deliver
34.3/40.019/20 Reviews10/10 Clients & Experience5.3/10 Market PresenceService focus
10% Enterprise App Modernization90% Other -
$25,000+$25 - $49 / hr250 - 999Frisco, TX
Ability to deliver
33.7/40.016.6/20 Reviews10/10 Clients & Experience7.1/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$50,000+$50 - $99 / hr250 - 999Unterschleißheim, Germany
Ability to deliver
32.2/40.017.2/20 Reviews10/10 Clients & Experience5/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$25,000+$25 - $49 / hr50 - 249L'viv, Ukraine
Ability to deliver
35.2/40.019/20 Reviews10/10 Clients & Experience6.2/10 Market PresenceService focus
15% Enterprise App Modernization85% Other -
$10,000+$50 - $99 / hr10 - 49Farmington, MI
Ability to deliver
31.5/40.016.6/20 Reviews10/10 Clients & Experience4.9/10 Market PresenceService focus
40% Enterprise App Modernization60% Other -
$50,000+$50 - $99 / hr50 - 249Gliwice, Poland
Ability to deliver
34.1/40.018.4/20 Reviews10/10 Clients & Experience5.7/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$25,000+$150 - $199 / hr50 - 249
Ability to deliver
32/40.016.6/20 Reviews10/10 Clients & Experience5.4/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$50,000+$50 - $99 / hr250 - 999London, England
Ability to deliver
31.8/40.016.4/20 Reviews10/10 Clients & Experience5.4/10 Market PresenceService focus
20% Enterprise App Modernization80% Other -
$1,000+< $25 / hr50 - 249Jaipur, India
Ability to deliver
32.6/40.017.2/20 Reviews9.4/10 Clients & Experience6/10 Market PresenceService focus
25% Enterprise App Modernization75% Other -
$10,000+$50 - $99 / hr50 - 249Warszawa, Poland
Ability to deliver
31.5/40.016.6/20 Reviews10/10 Clients & Experience4.9/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$10,000+$25 - $49 / hr50 - 249Portland, OR
Ability to deliver
31.5/40.016.8/20 Reviews10/10 Clients & Experience4.7/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$250,000+$150 - $199 / hr10 - 49Littleton, CO
Ability to deliver
33.3/40.017.6/20 Reviews10/10 Clients & Experience5.7/10 Market PresenceService focus
25% Enterprise App Modernization75% Other -
$50,000+$150 - $199 / hr50 - 249Conshohocken, PA
Ability to deliver
31.5/40.016.2/20 Reviews10/10 Clients & Experience5.2/10 Market PresenceService focus
30% Enterprise App Modernization70% Other -
$10,000+$50 - $99 / hr250 - 999Hudson, OH
Ability to deliver
31.4/40.016.4/20 Reviews9.8/10 Clients & Experience5.2/10 Market PresenceService focus
20% Enterprise App Modernization80% Other
Top App Modernization Agencies
App modernization companies upgrade, refactor, or re-platform legacy software so it performs like a modern, cloud-ready application. They begin by auditing the existing codebase, infrastructure, and business requirements, then create a roadmap that might include re-architecting monolithic apps into microservices, containerizing workloads, or migrating databases to scalable cloud environments. Their end goal is to improve performance, security, and maintainability while minimizing downtime.
Most firms deliver a mix of strategic and technical services, such as:
- Legacy code assessment and technical debt analysis
- Re-platforming (e.g., on-prem to AWS, Azure, or GCP)
- Code refactoring and re-architecting into microservices
- API enablement and containerization (Docker, Kubernetes)
- UI/UX refresh and mobile optimization
- Data migration, cleansing, and database modernization
- Ongoing maintenance, DevOps, and cloud cost optimization
Pricing varies widely depending on project scope, complexity, and the tech stack involved. Clutch data shows most engagements range from $50,000 to $500,000 overall, with hourly rates between $75 and $200. Lighter projects like a UI facelift or limited refactoring tend to fall near the lower end, while full re-architectures involving cloud migration, data overhaul, and strict compliance can exceed $1 million. Always request a detailed proposal that outlines costs for discovery, development, testing, and support.
When choosing the best right app modernization for your business, consider these:
- Review expertise: Look for case studies that mirror your tech stack (Java, .NET, PHP) and industry compliance needs.
- Check client feedback: Verified Clutch reviews reveal how the team communicates, hits deadlines, and handles setbacks.
- Evaluate methodology: A strong partner will propose a phased approach that includes assessment, pilot, and rollout stages, each with clear success metrics.
- Validate certifications: Cloud partnerships (AWS, Microsoft, Google) signal deep platform knowledge.
- Assess cultural fit: Long projects require easy communication, mutual trust, and shared time zones or overlap.
These are some of the red flags that you should watch for when hiring an app modernization company:
- Guaranteed timelines before an audit: Accurate estimates require a code and infrastructure review.
- Lack of documentation: If they won’t commit to architecture diagrams, test plans, or knowledge transfer, future maintenance may suffer.
- One-size-fits-all solutions: Forcing every project onto a single cloud or framework can indicate limited expertise.
- Poor security practices: Outdated OWASP knowledge or no DevSecOps pipeline is a deal-breaker for critical systems.
- Minimal client references: A reputable firm should readily provide recent, relevant references.
Here are some questions you can ask app modernization companies before hiring them:
- Which modernization strategies (rehost, refactor, re-architect) do you recommend for our stack, and why?
- Can you share success metrics from similar projects—e.g., performance gains or cost reductions?
- What is your approach to minimizing downtime during migration?
- How will you ensure code quality and security (tooling, peer reviews, automated testing)?
- What support and knowledge-transfer do you provide after launch?
- How do you handle scope changes and unforeseen legacy issues?
Partnering with specialists accelerates time-to-value. Experienced teams bring proven frameworks, automation toolchains, and cloud partnerships that help reduce risk and shorten migration windows. Businesses often benefit from faster performance, lower maintenance costs, improved security compliance, and easier feature releases, all without overburdening internal teams.
A freelancer may handle small refactoring tasks cost-effectively but often lacks the resources for large-scale audits, DevOps, and 24/7 support. Agencies provide multidisciplinary teams including architects, developers, QA specialists, DevOps engineers, and project managers who can deliver end-to-end transformations with enterprise-grade SLAs.