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

1,311 Companies-Rankings updated: September 30, 2026

Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

United States × .Net Development ×
  • Adastra

    VerifiedVerified by the DesignRush team for authenticity and credibility.
    Bridging the Gap with Big Data, Connecting Possibilities with People.

    Bridging the Gap with Big Data, Connecting Possibilities with People.

    Adastra Corp connects businesses worldwide with the opportunities that data offers. With over 20 years of experience, we are leaders in Big Data, IT, and AWS consulting. We deliver high-performing, secure solutions, bridge the gap between business strategy and technology, and accelerate innovation...

    Top Services:

    • Cloud Consulting
    • Big Data Analytics
    • Software Development
    • Mobile App Development
    • IT Services
    • Show more
    Location
    Austin, Texas
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $150/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    5 Projects Listed
  • Shaping Digital Together

    Shaping Digital Together

    CTGs comprehensive solutions help clients across all industries address the business, technology, and operational challenges that are escalating as the pace of change gets faster and the stakes get higher. Our solutions leverage the latest tools and methodologies to allow for greater technology and...

    Top Services:

    • Mobile App Development
    • Web Development
    • Software Development
    • IoT
    • Cloud Consulting
    • Show more
    Location
    Buffalo, New York
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    6 Projects Listed
  • Custom Solutions That Fit Your Needs

    Custom Solutions That Fit Your Needs

    Coherent Solutions offers tailored software solutions to businesses worldwide, ranging from large enterprises to startups. With a focus on development, deployment, and consulting, our comprehensive services encompass various areas...

    Top Services:

    • Mobile App Development
    • Software Development
    • UI/UX Design
    • Web Development
    • Web Design
    • Show more
    Location
    Minneapolis, Minnesota
    Number of Employees
    1000 & Up
    Minimal Budget
    $10,000 - $25,000
  • Infinite Possibilities with Technology

    Infinite Possibilities with Technology

    Kellton is a publicly listed, CMMI Level 5, and ISO 9001:2015 certified global company, providing cutting-edge AI and digital transformation solutions and services in strategy, consulting, digital, and technology...

    Top Services:

    • Big Data Analytics
    • Software Development
    • AI Development
    • Mobile App Development
    • Show more
    Location
    Reston, Virginia
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    8 Projects Listed
  • Digitally transformed human experiences

    Digitally transformed human experiences

    Blending strategic insights and thoughtful design with brilliant engineering, we create durable technical solutions that deliver digital transformation at scale...

    Top Services:

    • Software Development
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • AI Development
    • Show more
    Location
    Minneapolis, Minnesota
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $99/hr
    Minimal Budget
    $50,000 & Up
  • Let's Save Lives Together

    Let's Save Lives Together

    CureMD's physician billing services are easy and stress free Our team of experts will handle all the complex details, so you can focus on providing excellent patient care...

    Top Services:

    • Software Testing
    • AI Development
    • Software Development
    • CRM Consulting
    • Call Centers
    • Show more
    Location
    New York City, New York
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $35/hr
    Minimal Budget
    Under $1,000
  • See Beyond, Rise Above.

    See Beyond, Rise Above.

    Persistent Systems, a renowned global leader in software product development and technology services. Delve into our innovative offerings to stay ahead in the ever-evolving landscape of technology...

    Top Services:

    • AI Development
    • Software Development
    • Web Development
    • Mobile App Development
    • Blockchain
    • Show more
    Location
    Santa Clara, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $50,000 & Up
  • Precise Engineering. Here.

    Precise Engineering. Here.

    At LKICORP®, we provide expert engineering services to clients across a range of industries. Our team of skilled engineers has experience in mechanical, electrical, and environmental engineering, among others. We work closely with our clients to understand their unique needs and develop customized solutions...

    Top Services:

    • Mobile App Development
    • Software Testing
    • VR/AR
    • Blockchain
    • Software Development
    • Show more
    Location
    Pittsburgh, Pennsylvania
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $300/hr
    Minimal Budget
    $50,000 & Up
  • We Bring Your Innovative Ideas to Life

    We Bring Your Innovative Ideas to Life

    Ciklum is a global Digital Solutions Company for Fortune 500 and fast-growing organisations alike around the world. The company is headquartered in London and has software development centres and branch offices in the United States, Spain, Switzerland, Denmark, Israel, Poland, Ukraine, Belarus, UAE and...

    Top Services:

    • eCommerce Development
    • AI Development
    • Software Development
    • IT Services
    • Cybersecurity
    • Show more
    Location
    New York City, New York
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $25,000 - $50,000
  • Best award-winning software development company in South Korea.

    Best award-winning software development company in South Korea.

    Time Tec South Korea is a top-rated, multi-award-winning software development company providing a full suite of services and solutions like mobile application development, software development, Microsoft Dynamics 365 development, web development, ServiceNow consulting, and cybersecurity consulting to small...

    Top Services:

    • Software Development
    • AI Development
    • Mobile App Development
    • Cybersecurity
    • Show more
    Location
    Meridian, Idaho
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
  • Empowering enterprises to transform through human ingenuity and engineering excellence.

    Empowering enterprises to transform through human ingenuity and engineering excellence.

    Visionet is a leading IT services firm delivering digital experiences, enterprise modernization, Data & AI applications, and managed IT services. We leverage digital, data, and cloud technologies to meet clients needs efficiently. Serving diverse sectors, we simplify complexities and foster innovation. With a...

    Top Services:

    • IT Services
    • AI Development
    • Big Data Analytics
    • Cloud Consulting
    • DevOps Consulting
    • Show more
    Location
    Cranbury, New Jersey
    Number of Employees
    1000 & Up

Why companies trust DesignRush

Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
126,225+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
49%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
1,311

Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.

See how rankings and monetization work.

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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