Collaborate with top .NET development companies in the United States to modernize, streamline, and scale your systems through custom .NET development.

We Compiled the Best USA .Net Development Companies for You

3 Companies - Rankings updated: September 03, 2026

Each agency listed on DesignRush is assessed for industry expertise and customer testimonials are evaluated in order to provide you with a vetted selection. Certain listings represent paid partnerships.

United States × .Net Development × Public Safety × $25,000 - $50,000 × Clear Filters
  • Strategize. Develop. Deliver.

    Your business faces unique challenges. Let's work together to create a custom mobile app or web solution to meet those challenges head-on...

    Top Services:

    • Mobile App Development
    • Software Development
    • Staff Augmentation
    • IoT
    • AI Development
    • Show more
    Location
    Nashua, New Hampshire
    Number of Employees
    250 - 499
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    8 Projects Listed

    Zco Corporation Services

    • Mobile App Development
    • Software Development
    • Staff Augmentation
    • IoT
    • AI Development
    • UI/UX Design
    • Web Development
    • Software Testing
    • VR/AR
    • Wearables
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Volkswagen
    • Harvard University
    • BBC America
    • Verizon
    • Liberty Mutual
    • Microsoft
    • Samsung
    • Eversource
    • APR Energy
    • Dartmouth College
    Data sourced from the agency's DesignRush profile

    Zco Corporation Reviews & Testimonials

    • Mark Gratiot
      Mark Gratiot Director of R&D at Streamline Automation
      5.0

      Cross-Platform Review from Mark Gratiot

      In addition to building out a native remote inspection app for iPads, Zco concurrently ported the software to a Xamarin platform for Windows users. Zco has released nine major iterations of the iPad app, each available in the App Store, as well as the initial version of the cross-platform Xamarin build. Their nimble team boasts a wide breadth of skills to match any given situation. Having clear documentation upfront has reduced onboarding time.

    • Katie Matter
      Katie Matter Project Manager at Southwestern Advantage
      5.0

      Mobile App Development Review from Katie Matter

      Zco Corporation provided full-stack mobile app development to an educational resource retail organization. They worked in Unity to build a cross-platform resource for users to advance through various curricula. The app has successfully been moved into preproduction and the second phase of development, completely satisfying project stakeholders with the quality of both its designs and functionality. The Zco Corporation team is highly creative and collaborative throughout their work.

    • J. Michael Webb
      J. Michael Webb CEO at CheckMySpot
      5.0

      Startup Review from J. Michael Webb

      J. Michael Webb from CheckMySpot chose Zco Corporation for app development due to its expertise. Zco adeptly developed a hybrid mobile teledermatology platform and an admin website, demonstrating excellent communication, responsiveness, and innovation. Despite the project's evolving and innovative nature, Zco seamlessly integrated Webb's intent and met all challenges, leaving him with no suggestions for improvement. (Verified via email/call)

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • We transform your ideas into applications.

    At Appstract, we specialize in crafting solutions that deliver unforgettable user experiences by leveraging innovation and adhering to best practices in mobile and web application development and design. Our mission is to ensure that every interaction with our products leaves a lasting impression, driving...

    Top Services:

    • Software Development
    • Mobile App Development
    • Product Design
    • UI/UX Design
    • Staff Augmentation
    • Show more
    Location
    Coconut Creek, Florida
    Number of Employees
    Under 49
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    4 Projects Listed

    Appstract LLC Services

    • Software Development
    • Mobile App Development
    • Product Design
    • UI/UX Design
    • Staff Augmentation
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • AbInBev
    • Droguería del Sud
    • Prosegur
    • Mostaza
    • Temis Lostaló
    • Xapo Bank
    • Torc
    • Syngenta
    • Mundi
    • Bull Market Brokers
    Data sourced from the agency's DesignRush profile
  • We Bring Bold Ideas to Life.

    IT, Software, and Chatbot Solutions to upscale your business. We partner with entrepreneurs and business leaders to design and build transformative technology solutions. By putting business goals first and the technology second, we achieve more impactful outcomes...

    Top Services:

    • IT Services
    • Staff Augmentation
    • Mobile App Development
    • Software Development
    • Show more
    Location
    New Orleans, Louisiana
    Number of Employees
    Under 49
    Average Hourly Rate
    $135/hr
    Minimal Budget
    $25,000 - $50,000

    LookFar Labs Services

    • IT Services
    • Staff Augmentation
    • Mobile App Development
    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Camp Bow Wow
    • Feels
    • KTM Management
    • OnScene Services
    • MobileQubes
    • Louisiana Thoroughbred Breeders Association
    • MatchPoint
    Data sourced from the agency's DesignRush profile

    LookFar Labs Reviews & Testimonials

    • Shawn Litchfield
      Shawn Litchfield Review from Google
      5.0

      Shawn Litchfield's Review Sourced from Google

      LookFar Labs has been incredible to work with. We have a very complex product/service that they were able to help us move from a tedious manual process to an incredibly user friendly web-based system. We would highly recommend their services to anyone thinking about working with this great company.

    • John Spivey
      John Spivey Review from Google
      5.0

      John Spivey's Review Sourced from Google

      Lookfar has been a pleasure to work with. Smart, business savvy, and passionate about software development. Their approach was spot on and they were able to pivot with us as our goals changed. Truly a great partner and one I highly recommend.

    • Anthony Bodin
      Anthony Bodin Review from Google
      5.0

      Anthony Bodin's Review Sourced from Google

      Truly amazing team! My product wouldn't exist without their dedication. If you're looking for a true partner in developing your software product, Lookfar is your team.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews

Frequently Asked Questions

What services does a .NET development company in the United States provide?

A .NET development company in the United States provides full-cycle custom software, website, mobile app, and cloud development using the .NET framework and ecosystem. Specifically, they offer the following: 

  • Software audit: Analyzing the software performance, identifying issues, and creating strategies for improvements 
  • .NET modernization: Updating the solution’s codebase, infrastructure, UI/UX design, and other functionalities to the latest standards and technologies 
  • .NET migration: Securely transferring documents and data to a .NET software while minimizing disruption to core business processes 
  • Cross-platform development: Crafting applications that can seamlessly function on iOS, Android, Windows, and Linux devices using a single base code 
  • Custom APIs: Unifying systems by integrating .NET software with other apps and solutions 
  • Enterprise solution development: Producing custom customer relationship management (CRM), finance, and inventory systems based on .NET and Windows apps 
  • .NET consulting: Providing expert advice on optimizing the use of the .NET ecosystem and enhancing current technologies 
  • Maintenance and support: Continuously monitoring performance, resolving issues, and updating .NET applications to ensure they remain fully functional 

How much does it cost to develop a .NET solution in the United States?

On average, a .NET solution in the United States costs between $20,000 and $100,000. The final price will depend on the software type, core features and functions, project timeline, compliance requirements, and team expertise.  

Here’s an estimation of .NET project costs: 

  • Websites: $10,000-$200,000 
  • Desktop software: $20,000-$150,000 
  • Mobile apps: $20,000-$150,000 
  • Enterprise solutions: $50,000-$1,000,000 
  • Game development: $10,000-$1,000,000 
  • eCommerce apps: $10,000-$200,000 

How long does a .NET development company in the United States take to complete a project?

Typically, a .NET development company in the United States takes about 2 to 6 months to complete a project. However, the timeline will ultimately depend on project scope and complexity, development methodology (agile, waterfall, and scrum), and team size. 

Below is a timeline breakdown: 

  • Research, discovery, and design: 2-4 weeks 
  • Development: 4-12 weeks 
  • Testing: 2-6 weeks 
  • Launch: 1-2 weeks 

How do I choose the right USA .NET development company?

To choose the right USA .NET development company for your business, consider the following steps: 

Outline project goals, timeline, budget, target users, and technical requirements 

  1. Examine the agency’s service range and technical proficiency, especially in related technologies like ASP.NET, MVC, and Web API 
  2. Identify if the agency has case studies and portfolios on projects similar to yours 
  3. Read the agency’s positive and negative client reviews to assess its customer service strengths and weaknesses 
  4. Seek out awards, recognitions, and certifications 
  5. Send a request for proposal (RFP) to your top 5-8 candidates 
  6. Schedule an introductory meeting and inquire about security measurements, IP rights, and development approach 
  7. Select a US .NET development company that aligns with your budget, project requirements, and company culture 

Struggling to find a US .NET company? Visit our Marketplace and send your project requirements. We will match you with companies that best meet your criteria — at no cost! 

How do USA .NET development companies ensure quality results?

USA .NET development companies ensure quality results by implementing a comprehensive quality assurance (QA) strategy customized to your specific business objectives. The strategy typically includes a series of tests to verify the software’s end-to-end functionality, usability, security, interoperability, and durability. It also helps ensure that the final product aligns with your business requirements and meets industry standards. 

Here are some of the QA tests that US .NET development companies employ: 

  • Unit testing: Examines the software’s individual components, including module behavior, code-level functions, and error handling 
  • User acceptance testing: Simulates real-world usage, such as user interaction and how well the app integrates with business processes and workflows 
  • Integration testing: Assesses how the different system components interact with each other, including how data flows and how third-party systems work together 
  • Regression testing: Analyzes the stability and functionality of the app after a bug has been fixed 

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