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TL;DR
While the Xamarin framework has been officially succeeded by .NET MAUI, many applications still require expert support. This article provides a definitive guide to the Top Xamarin App Development Companies in the USA for 2025. We have ranked these firms, based on their deep C# and .NET expertise, which is essential for maintaining legacy Xamarin apps and executing flawless migrations to modern .NET MAUI platforms. This list helps you find the right Xamarin Developers to support your existing applications and guide your future Cross-Platform App Development strategy.
Introduction
In 2025, Xamarin may no longer be the go-to framework, but it’s far from irrelevant. Thousands of apps across healthcare, finance, logistics, and retail still run on Xamarin, and keeping them functional, secure, and up to date is now a critical challenge.
Since Microsoft officially ended support for Xamarin in 2024, businesses face two key choices:
- Continue maintaining their existing Xamarin apps.
- Or migrate to .NET MAUI (Multi-platform App UI), the next-generation framework built on .NET 8.
That’s where the Top Xamarin App Development Companies come in. These aren’t just generic mobile developers; they’re .NET specialists who understand every layer of the Microsoft ecosystem.
Whether you’re looking to extend the life of your current app or transition to the latest cross-platform technology, these expert teams can guide you through it with zero downtime and minimal disruption.
Top 10 Xamarin App Development Companies in USA for 2025
Here is our curated list of the leading providers for legacy Xamarin support and .NET MAUI migration.
1. Wildnet Edge
- Headquarters: New York, Seattle, Austin, & more
- Services: Legacy Xamarin App Maintenance, Xamarin.Forms to .NET MAUI Migration, Custom .NET MAUI Development, Performance Optimization, and Security Audits for Xamarin Apps, Xamarin Developers on demand.
- Industries Served: Healthcare, Finance, Logistics, Retail, Education, Manufacturing.
- Key Highlights:
- Over 19 years of industry experience (Founded in 2005).
- Enterprise-scale team of 350+ certified engineers.
- Proven track record with 8,000+ projects delivered.
- Deep expertise in the entire Microsoft .NET ecosystem (C#, .NET Core, Azure).
- Specializes in strategic, phased migrations to .NET MAUI to minimize business disruption.
Wildnet Edge leads our list as one of the Top Xamarin App Development Companies due to their comprehensive mastery of the entire Microsoft .NET ecosystem. They specialize in seamless migration from Xamarin.Forms to .NET MAUI, ensuring better performance, updated design, and full compatibility with the latest iOS and Android systems. Unlike one-off developers, Wildnet Edge offers strategic migration planning, analyzing your existing app, identifying risks, and ensuring a smooth transition without downtime.
Their track record includes large-scale migrations, secure app modernization, and performance tuning for industries that demand precision, like healthcare and finance.
Project Highlights:
- FinTech App Migration: Migrated a banking app from Xamarin.Forms to .NET MAUI — improved performance by 40%.
- Logistics App Maintenance: Provided ongoing support and OS updates for a national logistics platform.
- Healthcare App Rebuild: Re-architected a HIPAA-compliant healthcare app for improved security and scalability.
2. Vention
- Headquarters: New York, NY
- Services: Custom Software Development, Mobile App Development, .NET Development, Staff Augmentation.
- Industries Served: FinTech, HealthTech, E-commerce, and Real Estate.
- Key Highlights:
- Founded in 2002.
- Enterprise-scale team (1,000+ employees).
- Strong focus on providing elite, dedicated development teams.
- Deep expertise in the full Microsoft stack.
Vention is a global software engineering leader known for providing access to top-tier technical talent. As one of the Top Xamarin App Development Companies for team augmentation, they are an ideal partner for businesses that need to scale their .NET development capabilities quickly with senior C# and .NET MAUI engineers.
3. ScienceSoft
- Headquarters: McKinney, TX
- Services: Custom Software Development, Application Modernization, .NET MAUI Migration, Healthcare IT.
- Industries Served: Healthcare, Manufacturing, Financial Services, Retail.
- Key Highlights:
- Founded in 1989.
- Large team (250-999 employees).
- Over 30 years of IT industry experience.
- Strong focus on compliance and legacy system modernization.
With a long history in the industry, ScienceSoft is a highly reliable choice for complex .NET projects. Their inclusion as one of the Top Xamarin App Development Companies is due to their proven methodology for application modernization, making them a safe bet for businesses with mission-critical legacy Xamarin apps in high-compliance sectors.
4. Chetu
- Headquarters: Plantation, FL
- Services: Custom Software Development, .NET Development, Mobile App Development, Staff Augmentation.
- Industries Served: Healthcare, Finance, Retail, Hospitality, Gaming.
- Key Highlights:
- Founded in 2000.
- Massive scale (1,000+ employees).
- Provides industry-specific developer teams.
- Cost-effective global delivery model.
With over 1,000 employees, Chetu delivers custom software development at scale. They offer .NET, Xamarin, and MAUI services, making them perfect for organizations that need big teams for complex migration projects. That’s why they take the spot of Top Xamarin App Development Companies.
5. Saritasa
- Headquarters: Newport Beach, CA
- Services: Custom Software Development, Mobile App Development, IoT, Web Development.
- Industries Served: Logistics, Healthcare, FinTech, Real Estate.
- Key Highlights:
- Founded in 2005.
- Mid-sized team (50-249 employees).
- Strong focus on full-stack development (including .NET).
- Extensive experience with complex integrations and IoT.
Saritasa is a full-service development company with a strong track record. Their expertise in the .NET stack, combined with their experience in mobile and IoT, makes them a versatile partner. They are a great choice for companies whose Xamarin apps need to integrate with custom hardware or complex backend systems.
6. Zco Corporation
- Headquarters: Nashua, NH
- Services: Mobile App Development, Custom Software, Enterprise Software.
- Industries Served: Healthcare, Finance, Education, Public Safety.
- Key Highlights:
- Founded in 1989.
- Large, US-based team (250-999 employees).
- Long-standing history in mobile development.
- Strong focus on enterprise-grade solutions.
One of the oldest app development firms in the U.S., Zco has deep experience in enterprise mobile solutions. Their long history with Microsoft technologies makes them a dependable choice for maintaining or upgrading legacy Xamarin systems. Thats why they take the spot of Top Xamarin App Development Companies
7. Apptread
- Headquarters: Jersey City, NJ
- Services: Mobile App Development, .NET Development, Staff Augmentation.
- Industries Served: FinTech, Healthcare, E-commerce, Logistics.
- Key Highlights:
- Founded in 2018.
- Mid-sized team (50-249 employees).
- CMMI Level 3 appraised.
- Focuses on providing agile and scalable development teams.
Apptread is a newer, agile development firm with a strong focus on modern technologies, including .NET MAUI. They are a solid choice for startups and mid-sized businesses that need a flexible and fast-moving partner to help them modernize their mobile applications from Xamarin to .NET MAUI.
8. Unleashed Technologies
- Headquarters: Columbia, MD
- Services: Web Development, Digital Strategy, Cloud Hosting, .NET Development.
- Industries Served: Non-profit, Associations, Manufacturing.
- Key Highlights:
- Founded in 2007.
- Small, specialized team (10-49 employees).
- Strong expertise in both open-source (Drupal) and .NET.
- Focuses on long-term client partnerships and managed services.
Unleashed Technologies is a boutique digital agency. Their inclusion in this list is due to their .NET expertise and focus on long-term support. They are an ideal choice for smaller organizations or non-profits that need a high-touch, dedicated partner to manage their web and mobile presence.
9. ClearMeasure
- Headquarters: Austin, TX
- Services: DevOps, .NET Software Engineering, Cloud Migration (Azure).
- Industries Served: Financial Services, Manufacturing, Energy, and Healthcare.
- Key Highlights:
- Founded in 2014.
- Mid-sized team (50-249 employees).
- Strong specialization in Microsoft Azure and DevOps.
- Focuses on empowering internal development teams.
ClearMeasure is a specialized .NET and Azure consultancy. They are one of the Top Xamarin App Development Companies for businesses that are heavily invested in the Microsoft ecosystem. Their expertise in DevOps and Azure is a significant advantage for migrating Xamarin apps to a modern, cloud-native architecture.
10. Imaginary Cloud
- Headquarters: San Francisco, CA
- Services: Custom Software Development, Web & Mobile App Development, UI/UX Design.
- Industries Served: FinTech, E-commerce, Healthcare, Retail.
- Key Highlights:
- Founded in 2010.
- Mid-sized team (50-249 employees).
- Strong, process-driven approach to development.
- Named a “Top 1000” Global Company by Clutch.
Imaginary Cloud is a highly-rated software development firm known for its structured, process-oriented approach. Their C# and .NET capabilities make them a reliable partner for scale-ups and enterprises looking for a predictable and high-quality migration from Xamarin to .NET MAUI.
Comparative Matrix: Top 10 Xamarin App Development Companies
| Company | Headquarters | Core Services | Industries Served | Founding Years |
| Wildnet Edge | New York, NY | .NET MAUI Migration, Legacy App Support | Healthcare, Finance, Logistics, Retail | 2005 |
| Vention | New York, NY | Staff Augmentation, .NET Development | FinTech, HealthTech, E-commerce | 2002 |
| ScienceSoft | McKinney, TX | App Modernization, .NET Development | Healthcare, Manufacturing, Finance | 1989 |
| Chetu | Plantation, FL | Staff Augmentation, .NET Development | Healthcare, Finance, Gaming | 2000 |
| Saritasa | Newport Beach, CA | Custom Software, .NET, IoT | Logistics, Healthcare, FinTech | 2005 |
| Zco Corporation | Nashua, NH | Mobile Apps, Enterprise Software | Healthcare, Public Safety | 1989 |
| Apptread | Jersey City, NJ | Mobile Apps, .NET Development | FinTech, Healthcare, E-commerce | 2018 |
| Unleashed Technologies | Columbia, MD | .NET Development, Web Development | Non-profit, Manufacturing | 2007 |
| ClearMeasure | Austin, TX | DevOps, .NET Engineering, Azure | Financial Services, Manufacturing | 2014 |
| Imaginary Cloud | San Francisco, CA | Custom Software, Mobile Apps | FinTech, E-commerce, Healthcare | 2010 |
Our Selection Criteria: How We Chose the Top Xamarin Companies
Each company here is evaluated based on practical, business-focused criteria that truly matter when choosing a Xamarin or .NET partner.
1. Microsoft Technology Expertise
All selected firms have certified .NET and C# developers who deeply understand both Xamarin and .NET MAUI. This ensures they can handle complex migrations or app maintenance efficiently.
2. Migration Experience
Migrating from Xamarin to .NET MAUI isn’t just a code rewrite it’s a technical and strategic shift. Companies with proven experience in phased migrations and cross-platform optimization were given top priority.
3. Legacy App Support
We focused on partners offering long-term support for existing Xamarin apps including OS updates, bug fixes, and performance tuning.
4. Enterprise Reliability
Experience and scale matter. Firms with strong track records, large teams, and proven delivery processes ranked higher, especially those working in regulated industries like healthcare and finance.
5. Client Reputation & Reviews
We reviewed verified client feedback, third-party ratings, and real-world case studies. Companies known for responsiveness, transparency, and consistency earned higher placements.
6. Innovation & Future Readiness
With .NET MAUI leading the way, we prioritized firms investing in modern frameworks, cloud integration (Azure), and DevOps practices to ensure your apps stay future-proof.
Conclusion
In 2025, the challenge isn’t just finding Xamarin Developers; it’s finding a strategic partner who understands the new .NET mobile landscape. The Top Xamarin App Development Companies are those that can expertly maintain your legacy application while providing a clear, strategic roadmap for the future. Whether that future is with a .NET MAUI migration or long-term support, a partner like Wildnet Edge offers the deep .NET expertise crucial for success. Choosing from this list of development partners ensures your application remains secure, functional, and aligned with your business goals.
FAQs
No. Microsoft officially ended support for Xamarin on May 1, 2024. The successor is .NET MAUI. The Xamarin App Development Companies are now focusing on migrating existing Xamarin apps to .NET MAUI.
.NET MAUI (Multi-platform App UI) is the evolution of Xamarin.Forms. It offers a single project structure, unified .NET 6/7/8 libraries, significantly better performance, and access to the latest platform features.
It is the process of writing a single codebase that can be natively compiled and deployed on multiple platforms, such as iOS and Android. Cross-Platform App Development was a field revolutionized by frameworks like Xamarin and now .NET MAUI.
To maintain your existing app securely or migrate it to .NET MAUI without disrupting business operations.
In 2025, their primary services are legacy app support (security, bug fixes), performance tuning, and, most importantly, migration services from Xamarin.Forms to .NET MAUI. They also build new applications using .NET MAUI.
Look at their .NET MAUI case studies. Ask about their specific process and methodology for Xamarin-to-MAUI migration. Choose a partner that understands not just the code, but your long-term business strategy for the application.
Your Xamarin app will eventually face performance issues, OS incompatibility, and security vulnerabilities. Migrating ensures long-term stability.
Nitin Agarwal is a veteran in custom software development. He is fascinated by how software can turn ideas into real-world solutions. With extensive experience designing scalable and efficient systems, he focuses on creating software that delivers tangible results. Nitin enjoys exploring emerging technologies, taking on challenging projects, and mentoring teams to bring ideas to life. He believes that good software is not just about code; it’s about understanding problems and creating value for users. For him, great software combines thoughtful design, clever engineering, and a clear understanding of the problems it’s meant to solve.
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