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Home DOTNET United States Illinois

Top .NET Developers in Illinois

Ratings Updated: September 18, 2026
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102 Companies

Country: United States
State: Illinois

List of the Top Illinois .NET Development Companies

  • Featured

    What are Featured Providers?

    Leobit Logotype

    Leobit

    4.9 56 reviews
    Verified
    $25,000+
    $25 - $49 / hr
    50 - 249
    Serves Illinois

    Services provided

    20% Custom Software Development
    20% AI Development
    20% Web Development +4
    10% AI Agents
    10% Cloud Consulting & SI
    10% Generative AI
    10% Mobile App Development

    Focus Areas

    50% .NET
    10% Angular
    10% Flutter +3
    10% React
    10% Ruby on Rails
    10% VueJS

    Leobit is a custom software development company specializing in end-to-end software engineering solutions, with a strong focus on flexibility, agile project management, and delivering high-quality technical expertise. Reviews indicate a 100% positive feedback rate, highlighting their effective communication, timely delivery, and ability to meet client expectations across various projects, from mobile app development to advanced web platforms.

    See all 56 projects

    Reviews mention Helpful

    Leobit has received positive feedback regarding their helpfulness, with clients highlighting their exceptional communication and responsiveness. For instance, one client noted the team's kindness and willingness to assist in optimizing project costs, which was crucial for their non-profit organization. Another client praised the respectful approach of Leobit's team, stating they do not push unnecessarily, thereby making collaboration a pleasant experience. Overall, clients express satisfaction with Leobit's supportive nature and commitment to understanding their unique needs.
    • Mobile App & UX/UI Design for Medical Imaging Solutions Co
      5.0 Jun 7, 2024

      Their communication is exceptional. They consistently provide quick responses to our messages and emails. Their entire team demonstrates kindness and helpfulness. What's particularly noteworthy is their respectful approach; they don't push us unnecessarily, making our collaboration with Leobit a pleasant experience.

      Read Full Review
    • Custom Software Development for Financial Services Company
      5.0 Nov 10, 2023

      They are great people and very helpful. Due to the time difference, it can be challenging to communicate effectively, especially when urgent requests arise. It would also be beneficial to receive feedback and suggestions from professionals at Leobit on how we can further enhance our platform.

      Read Full Review
    • Dev Staff Augmentation for Digital Insurance Platform
      4.5 Nov 7, 2022

      They are willing to work through issues with us and have helped us become a better team. Their project management style is a hands-on approach, and they are usually pretty good about communicating things to us in a timely manner. The code is generally high quality, and we work through any questions or issues that arise during development or testing.

      Read Full Review
    • Mobile App Development for Woman's Rights Org
      5.0 Apr 16, 2025

      From the very beginning, we were offered several ways to optimize project costs, because we are a non-governmental organization and we do not have the opportunity to revise budgets and it is very difficult to raise other funds, so this customer focus helped us a lot to implement the project. In the process of implementation, the project manager and all the specialists involved were very understanding of the fact that we were new to the topic, and also took into account certain requirements that we had fixed for the project and adjusted the plans to the real deadlines we had. Since our organization does not have a separate system administrator or a person specializing in digital infrastructure, the developers helped us at all stages to register accounts on various services and set them up.

      Read Full Review
    • Web App Development for Online Gift Shop
      4.5 Oct 9, 2018

      They’re knowledgeable. We’ve worked with people at different stages of their careers, but most of us have been happy with the service delivered by Leobit. They do their best to try to find the right person for the task, and they help a lot in our data endeavors. It’s hard to find a good data engineer or BI person in offshore companies, and they were able to help us. They’re motivated, and they deliver what they promise all the time. We’re happy with them.

      Read Full Review
    Read All Reviews
    29 of 32 Custom Software Development reviews are 5 stars
    2 new reviews for Custom Software Development in past 6 months
    $50,000 – $199,999 avg. project cost

    Custom Software Development PROJECT HIGHLIGHT

    App Development & Testing for Financial Services Co

    5.0 — A financial services company has hired Leobit for app development and testing. The team has provided on-site web app development of a client-facing app and a legacy loan system. Read more
    Read 32 Reviews

    Average Project Cost Breakdown

    $50,000 to $199,999 (14) $10,000 to $49,000 (9) $200,000 to $999,999 (7) Less than $10,000 (5)

    What Clients Have Said

    Leobit is consistently recognized for providing excellent value for money, with clients frequently highlighting their competitive pricing. For instance, one client noted that Leobit's pricing fit their budget while offering high-quality resources, resulting in significant cost savings compared to onshore options. Another client emphasized the good value for cost and the exceptional responsiveness of the team. Overall, the sentiment reflects satisfaction with the balance of quality and affordability, making Leobit a favorable choice for various projects.
    Read All Reviews

    More responsive than most other service providers

    Leobit is very responsive

    They are a great candidate to start a conversation with. Send them a short message or project inquiry.
    Get in Touch
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  • ComTec Information Systems (IT) Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    250 - 999
    Chicago, IL

    Services provided

    10% Custom Software Development
    20% CRM Consulting and SI
    20% Cloud Consulting & SI +4
    20% Robotics Process Automation
    10% Application Testing
    10% BI & Big Data Consulting & SI
    10% Mobile App Development

    Focus Areas

    50% .NET
    50% Oracle Application Development Framework

    Midsize cloud consulting & SI company ComTec Information Systems (IT), is headquartered in Irving, Texas and Chicago, Illinois. The team offers cloud consulting & SI and CRM consulting and SI.

    Read more

    Chicago, IL

    8770 W Bryn Mawr Ave
    Chicago, IL 60631

    1

    See All Locations (3)
    View Profile
  • Magenic Logotype

    Not yet reviewed

    $10,000+
    $100 - $149 / hr
    250 - 999
    Lombard, IL

    Services provided

    55% Custom Software Development
    20% Mobile App Development
    15% Application Testing +1
    10% UX/UI Design

    Focus Areas

    50% .NET
    30% Other frameworks and CMS
    20% Angular

    Magenic is a software development firm. The company is based in St. Louis Park, Minnesota and San Francisco, California. Their team offers Custom Software Development and Mobile App Development.

    Read more

    Lombard, IL

    333 East Butterfield Road, Suite 100
    Lombard, IL 60148

    630-390-7809

    See All Locations (4)
    View Profile

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Clutch Leaders Matrix

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

1 LLT Group
2 Velvetech LLC
3 Marcel Digital
4 Sandstorm Design
5 Adage Technologies
6 Pixo
7 CSW Solutions Inc.
8 MXOtech, Inc.
9 Spark Equation
10 Mojo Trek
11 Neologic Software
12 Red Caffeine - A Growth Consultancy
13 alligatortek
14 Liventus
15 MLP Co

List of the Top 15 Illinois .NET Development Companies

  1. LLT Group Logotype

    LLT Group

    $25,000+
    $200 - $300 / hr
    10 - 49
    Naperville, IL

    Ability to deliver

    35.1/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    5.7/10 Market Presence

    Service focus

    30% Web Development
    70% Other
    View Profile Visit Website
  2. Velvetech LLC Logotype

    Velvetech LLC

    $25,000+
    $50 - $99 / hr
    250 - 999
    Chicago, IL

    Ability to deliver

    31.4/40.0
    16.2/20 Reviews
    10/10 Clients & Experience
    5.2/10 Market Presence

    Service focus

    40% Custom Software Development
    62% .NET
    10% Web Development
    50% Other
    View Profile Visit Website
  3. Marcel Digital Logotype

    Marcel Digital

    $5,000+
    $200 - $300 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    33/40.0
    17.4/20 Reviews
    9.2/10 Clients & Experience
    6.4/10 Market Presence

    Service focus

    40% Web Development
    60% Other
    View Profile Visit Website
  4. Sandstorm Design Logotype

    Sandstorm Design

    $100,000+
    $150 - $199 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    32.2/40.0
    17/20 Reviews
    10/10 Clients & Experience
    5.2/10 Market Presence

    Service focus

    40% Web Development
    60% Other
    View Profile Visit Website
  5. Adage Technologies Logotype

    Adage Technologies

    $75,000+
    $150 - $199 / hr
    50 - 249
    Chicago, IL

    Ability to deliver

    32.2/40.0
    17.2/20 Reviews
    10/10 Clients & Experience
    5/10 Market Presence

    Service focus

    20% Web Development
    80% Other
    View Profile Visit Website
  6. Pixo Logotype

    Pixo

    $10,000+
    $150 - $199 / hr
    10 - 49
    Champaign, IL

    Ability to deliver

    31.9/40.0
    17/20 Reviews
    10/10 Clients & Experience
    4.9/10 Market Presence

    Service focus

    35% Custom Software Development
    47% .NET
    25% Web Development
    40% Other
    View Profile Visit Website
  7. CSW Solutions Inc. Logotype

    CSW Solutions Inc.

    $10,000+
    $100 - $149 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    29/40.0
    15.6/20 Reviews
    7.8/10 Clients & Experience
    5.6/10 Market Presence

    Service focus

    30% Custom Software Development
    80% .NET
    30% Web Development
    40% Other
    View Profile Visit Website
  8. MXOtech, Inc. Logotype

    MXOtech, Inc.

    $10,000+
    $100 - $149 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    28.5/40.0
    15/20 Reviews
    8/10 Clients & Experience
    5.5/10 Market Presence

    Service focus

    70% Custom Software Development
    100% .NET
    30% Other
    View Profile Visit Website
  9. Spark Equation Logotype

    Spark Equation

    $50,000+
    $100 - $149 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    30.6/40.0
    16.2/20 Reviews
    10/10 Clients & Experience
    4.4/10 Market Presence

    Service focus

    40% Custom Software Development
    40% .NET
    20% Web Development
    40% Other
    View Profile Visit Website
  10. Mojo Trek Logotype

    Mojo Trek

    $10,000+
    $50 - $99 / hr
    50 - 249
    Chicago, IL

    Ability to deliver

    32.3/40.0
    16.8/20 Reviews
    10/10 Clients & Experience
    5.5/10 Market Presence

    Service focus

    60% Custom Software Development
    15% .NET
    10% Web Development
    30% Other
    View Profile Visit Website
  11. Neologic Software Logotype

    Neologic Software

    $5,000+
    $100 - $149 / hr
    10 - 49
    Northbrook, IL

    Ability to deliver

    32.1/40.0
    18.4/20 Reviews
    10/10 Clients & Experience
    3.7/10 Market Presence

    Service focus

    70% Custom Software Development
    20% .NET
    30% Other
    View Profile Visit Website
  12. Red Caffeine - A Growth Consultancy Logotype

    Red Caffeine - A Growth Consultancy

    $25,000+
    $200 - $300 / hr
    10 - 49
    Lombard, IL

    Ability to deliver

    29.3/40.0
    15.2/20 Reviews
    8.7/10 Clients & Experience
    5.4/10 Market Presence

    Service focus

    20% Web Development
    80% Other
    View Profile Visit Website
  13. alligatortek Logotype

    alligatortek

    $10,000+
    Undisclosed
    50 - 249
    Chicago, IL

    Ability to deliver

    29.4/40.0
    15.8/20 Reviews
    8.8/10 Clients & Experience
    4.8/10 Market Presence

    Service focus

    25% Custom Software Development
    60% .NET
    75% Other
    View Profile Visit Website
  14. Liventus Logotype

    Liventus

    $5,000+
    $100 - $149 / hr
    50 - 249
    Chicago, IL

    Ability to deliver

    31.4/40.0
    15.6/20 Reviews
    10/10 Clients & Experience
    5.8/10 Market Presence

    Service focus

    15% Custom Software Development
    50% .NET
    85% Other
    View Profile Visit Website
  15. MLP Co Logotype

    MLP Co

    $5,000+
    $25 - $49 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    29.4/40.0
    16.2/20 Reviews
    9.4/10 Clients & Experience
    3.9/10 Market Presence

    Service focus

    40% Custom Software Development
    40% .NET
    30% Web Development
    30% Other
    View Profile Visit Website
  16. SPR Logotype

    SPR

    $25,000+
    $150 - $199 / hr
    250 - 999
    Chicago, IL

    Ability to deliver

    31.9/40.0
    16.2/20 Reviews
    9.8/10 Clients & Experience
    5.9/10 Market Presence

    Service focus

    25% Custom Software Development
    12% .NET
    75% Other
    View Profile Visit Website
  17. Chicago Software Solutions Logotype

    Chicago Software Solutions

    $10,000+
    $100 - $149 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    28.2/40.0
    16.2/20 Reviews
    8/10 Clients & Experience
    4/10 Market Presence

    Service focus

    35% Custom Software Development
    50% .NET
    30% Web Development
    35% Other
    View Profile Visit Website
  18. Esco Logics, LLC Logotype

    Esco Logics, LLC

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

    Ability to deliver

    31.4/40.0
    16.8/20 Reviews
    9.4/10 Clients & Experience
    5.2/10 Market Presence

    Service focus

    15% Custom Software Development
    14% .NET
    35% Web Development
    50% Other
    View Profile Visit Website
  19. TangoCode Logotype

    TangoCode

    $50,000+
    $100 - $149 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    31.6/40.0
    16.8/20 Reviews
    10/10 Clients & Experience
    4.8/10 Market Presence

    Service focus

    30% Custom Software Development
    20% .NET
    10% Web Development
    60% Other
    View Profile Visit Website
  20. Prime TSR Logotype

    Prime TSR

    Undisclosed
    Undisclosed
    50 - 249
    Chicago, IL

    Ability to deliver

    28.5/40.0
    16.2/20 Reviews
    7.5/10 Clients & Experience
    4.8/10 Market Presence

    Service focus

    40% Custom Software Development
    30% .NET
    60% Other
    View Profile Visit Website
  21. KitelyTech Logotype

    KitelyTech

    $25,000+
    $200 - $300 / hr
    50 - 249
    Chicago, IL

    Ability to deliver

    31.6/40.0
    15.8/20 Reviews
    10/10 Clients & Experience
    5.8/10 Market Presence

    Service focus

    15% Custom Software Development
    23% .NET
    85% Other
    View Profile Visit Website
  22. Simply Smart Technology Logotype

    Simply Smart Technology

    $1,000+
    $100 - $149 / hr
    2 - 9
    Chicago, IL

    Ability to deliver

    27.2/40.0
    16.2/20 Reviews
    6.3/10 Clients & Experience
    4.6/10 Market Presence

    Service focus

    10% Web Development
    90% Other
    View Profile Visit Website
  23. TwinCore Logotype

    TwinCore

    $25,000+
    $25 - $49 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    27.8/40.0
    16.6/20 Reviews
    6.3/10 Clients & Experience
    4.9/10 Market Presence

    Service focus

    10% Custom Software Development
    56% .NET
    10% Web Development
    80% Other
    View Profile Visit Website
  24. Americaneagle.com Logotype

    Americaneagle.com

    $5,000+
    $150 - $199 / hr
    250 - 999
    Des Plaines, IL

    Ability to deliver

    23.8/40.0
    17.8/20 Reviews
    0/10 Clients & Experience
    6/10 Market Presence

    Service focus

    20% Web Development
    80% Other
    View Profile Visit Website
  25. Hristov Development Logotype

    Hristov Development

    $5,000+
    $25 - $49 / hr
    10 - 49
    Chicago, IL

    Ability to deliver

    30.8/40.0
    16.4/20 Reviews
    9.8/10 Clients & Experience
    4.6/10 Market Presence

    Service focus

    10% Custom Software Development
    10% .NET
    10% Web Development
    80% Other
    View Profile Visit Website
  26. Programmers - AI, Data & Software Logotype

    Programmers - AI, Data & Software

    $10,000+
    $50 - $99 / hr
    250 - 999
    Chicago, IL

    Ability to deliver

    23.1/40.0
    16.4/20 Reviews
    3/10 Clients & Experience
    3.7/10 Market Presence

    Service focus

    15% Custom Software Development
    45% .NET
    85% Other
    View Profile Visit Website
  27. Xcelacore Logotype

    Xcelacore

    $10,000+
    $100 - $149 / hr
    50 - 249
    Oak Brook, IL

    Ability to deliver

    24.3/40.0
    16.2/20 Reviews
    3.6/10 Clients & Experience
    4.5/10 Market Presence

    Service focus

    30% Custom Software Development
    47% .NET
    70% Other
    View Profile Visit Website
  28. KeyLimeTie Logotype

    KeyLimeTie

    $10,000+
    $100 - $149 / hr
    10 - 49
    Oak Brook, IL

    Ability to deliver

    24.5/40.0
    15.6/20 Reviews
    4/10 Clients & Experience
    4.9/10 Market Presence

    Service focus

    20% Web Development
    80% Other
    View Profile Visit Website
  29. CodingCops Logotype

    CodingCops

    $5,000+
    $25 - $49 / hr
    250 - 999
    Chicago, IL

    Ability to deliver

    27.1/40.0
    17.2/20 Reviews
    5.1/10 Clients & Experience
    4.8/10 Market Presence

    Service focus

    15% Custom Software Development
    10% .NET
    5% Web Development
    80% Other
    View Profile Visit Website
  30. Hoff & Mazor Logotype

    Hoff & Mazor

    $5,000+
    < $25 / hr
    50 - 249
    Skokie, IL

    Ability to deliver

    27.5/40.0
    17.2/20 Reviews
    4.8/10 Clients & Experience
    5.5/10 Market Presence

    Service focus

    10% Custom Software Development
    11% .NET
    90% Other
    View Profile Visit Website

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