8 Leading .NET DevelopmentCompanies in the USA You Can Trust

.NET continues to be one of the most dependable, adaptable, and secure frameworks for developing scalable web, desktop, and enterprise-grade applications. With its support for multiple programming languages, seamless integration with cloud services, and advanced security capabilities, it remains a go-to choice for organizations seeking strong and future-ready digital solutions.

Whether you’re a startup aiming to launch a rapid, scalable MVP or a large corporation looking to modernize outdated systems, collaborating with a custom .NET software development company can be a game-changer. In this guide, we present the 8 top-rated .NET development companies in the USA for 2025, chosen based on their technical excellence, domain expertise, and proven track record of client satisfaction.

1. Coders.dev

Coders.dev is a premier global platform that helps businesses hire top-tier .NET developers for short- and long-term projects. Known for its flexible hiring models and pre-vetted talent pool, Coders.dev is ideal for businesses seeking high-quality, cost-effective .NET solutions without the overhead of in-house hiring.
Chosen for this list because of its unmatched scalability and speed in matching developers to projects, making it a go-to for startups, agencies, and enterprises alike.

Key Services

• Dedicated remote .NET developer hiring
• ASP.NET Core web application development
• Enterprise-grade .NET solutions
• API development and system integrations
• Application migration and modernization

Tech Stack

C#, ASP.NET Core, .NET Framework, Blazor, Azure, Entity Framework, SQL Server, Angular, React

Reviews & Ratings

• Clutch Rating: 4.8/5
• Client Feedback: “Their developers integrated seamlessly with our team, delivering a high-performance .NET application ahead of schedule.”

Why Hire Coders.dev?

• Large pool of pre-vetted .NET professionals
• Flexible hiring models (hourly, monthly, dedicated)
• Great for fast onboarding and scaling teams
• Transparent pricing with no hidden costs

Contact Details & Headquarters

Website: www.coders.dev
Headquarters: London, England
Founded: 2003
Email: contact@coders.dev

2. CISIN 

With over two decades of industry experience, CISIN has delivered complex and secure .NET-based solutions across industries such as healthcare, logistics, and finance. They specialize in end-to-end project execution, from concept to deployment, making them perfect for enterprise-grade digital transformation.
Chosen for this list due to their expertise in high-security and compliance-driven .NET systems.

Key Services

• Custom .NET application development
• ERP, CRM, and intranet solutions
• Cloud-native .NET Core applications
• API and microservices architecture
• Legacy system migration to .NET

Tech Stack

ASP.NET Core, C#, Xamarin, Azure, Docker, Kubernetes, SQL Server, Angular

Reviews & Ratings

• Clutch Rating: 4.8/5
• Client Feedback: “CISIN built our compliance-driven ERP system with precision and scalability.”

Why Hire CISIN?

• Proven record in secure, scalable .NET systems
• Full-cycle development and long-term support
• Expertise in cloud and microservices architecture

Contact Details & Headquarters

Website: www.cisin.com
Headquarters: San Jose, California, USA
Founded: 2003
Email: info@cisin.com

3. Developers.dev 

Developers.dev stands out as a full-spectrum .NET development leader, offering scalable and innovative solutions tailored for startups, SMBs, and large enterprises alike. Backed by over 18 years of industry expertise, their team has completed more than 1,500 .NET projects, ranging from dynamic SaaS platforms to robust enterprise-grade applications. Known for having expert .NET developers delivering real value, they excel in building solutions with enterprise-ready architecture and a proven track record across diverse industries, making them a trusted choice for businesses seeking reliable digital transformation partners.

Key Services

• ASP.NET Core development
• Cross-platform .NET applications
• SaaS product engineering
• API and backend system development
• Application maintenance and optimization

Tech Stack

.NET 6, C#, Blazor, Xamarin, Azure, AWS, SQL Server, React, Angular

Reviews & Ratings

• Clutch Rating: 4.9/5
• Client Feedback: “They delivered a complex .NET SaaS platform that exceeded our expectations.”

Why Hire Developers.dev?

• Over 300 certified .NET developers
• Deep expertise in high-performance applications
• Focus on performance, scalability, and security

Contact Details & Headquarters

Website: www.developers.dev
Headquarters: San Jose, CA, United States
Founded: 2005
Email: info@developers.dev

4. Iflexion 

Iflexion combines UX-driven design with powerful .NET backend logic, making it ideal for businesses seeking both functionality and usability. They excel in building custom portals, CMS platforms, and enterprise-grade systems.
Chosen for this list for their balance of strong technical skills and design sensibility.

Key Services

• .NET web application development
• CMS and intranet solutions
• API integration and system interoperability
• Modular architecture builds
• Performance optimization

Tech Stack

ASP.NET MVC, C#, Azure, SharePoint, SQL Server, Angular

5. Unified Infotech 

Unified Infotech specializes in design-centric .NET applications that combine visual appeal with robust backend architecture. They are a great choice for marketing-driven websites and applications.
Chosen for this list for their creative approach to functional .NET builds.

Key Services

• Custom .NET website and portal development
• Responsive, mobile-first UI/UX
• Integration with marketing platforms
• CMS and eCommerce systems

Tech Stack

ASP.NET Core, C#, HTML5, CSS3, Bootstrap, JavaScript

6. Fingent 

Fingent delivers enterprise-scale .NET applications with a focus on cloud readiness and long-term scalability.
Chosen for this list for their cloud-native development expertise.

Key Services

• Cloud-based .NET apps
• Enterprise-grade application development
• System migration and modernization

Tech Stack

ASP.NET Core, Azure, AWS, SQL Server, Angular

7. ELEKS 

ELEKS provides comprehensive .NET development services, covering every stage from initial planning to post-deployment support. Recognized for delivering scalable .NET development for enterprise applications, they have built a strong reputation for successfully executing complex projects across industries, making them a trusted partner for businesses seeking reliable and future-ready enterprise solutions.

Key Services

• .NET Core development
• API integration
• ERP/CRM solutions

Tech Stack

ASP.NET Core, C#, Azure, Docker

8. OpenXcell 

OpenXcell provides cost-effective offshore .NET teams with expertise in high-performance applications.
Chosen for this list for their strong offshore development capabilities.

Key Services

• ASP.NET web and mobile apps
• SaaS platform development
• API integrations

Tech Stack

.NET, Azure, SQL Server, React

Conclusion

Selecting the right .NET development partner depends on your project’s complexity, budget, and long-term vision. For teams that need flexible hiring and quick scalability, Coders.dev proves to be an ideal option. CISIN is a trusted choice for building secure, enterprise-grade systems for Developers.dev offers scalable solutions and multi-industry expertise for businesses aiming for versatile digital growth. The other companies on this list also bring their specialized strengths, from design-focused development to cloud-native enterprise solutions, making it easy to find the best .NET development companies in the US to match any project requirement.