The .NET framework continues to power secure, scalable applications in a cloud-first world. With ongoing updates like .NET 8 and tight Azure integration, businesses rely on it for everything from enterprise systems to modern web and mobile solutions.
In the USA, top companies stand out by delivering high-quality .NET development services with proven expertise, strong client feedback, and reliable delivery. They serve startups building MVPs, growing businesses scaling up, and enterprises modernizing legacy code-offering flexible models like custom development and team augmentation.
These providers excel in ASP.NET Core, C#, Blazor, cloud solutions, and cross-industry projects (finance, healthcare, retail, and beyond). The focus remains on real value: secure, performant code that drives business results. Choosing the right partner can turn technical goals into measurable success.
1. Logiciel de liste A
At A-listware, we focus on IT outsourcing and staffing solutions where the main thing is building and managing remote development teams for clients. The approach involves handling the full process – from finding suitable developers through interviews and hiring to ongoing management – so companies can keep their attention on core business goals instead of day-to-day people stuff. .NET comes into play naturally since many projects need solid backend work, and we pull in developers experienced with that stack when it fits the requirements.
Clients usually look for this kind of setup when they want quick team ramp-up without building everything in-house. Communication stays straightforward, with emphasis on reliability and keeping things on track. It’s a practical way to extend capabilities, especially for software projects that rely on Microsoft technologies like .NET for custom applications or enterprise-level builds.
Faits marquants :
- Emphasis on remote team setup and management
- Handling of interviews and hiring process
- Focus on allowing clients to concentrate on business vision
- Experience with various development stacks including .NET
- European base with developer sourcing
Services :
- Recrutement de personnel pour l'externalisation des technologies de l'information
- Remote development team building
- Recrutement et gestion des développeurs
- .NET development support
- Project team extension
Informations de contact :
- Site web : a-listware.com
- Téléphone : +1 (888) 337 93 73
- Courriel : info@a-listware.com
- Adresse : North Bergen, NJ 07047, USA
- LinkedIn : www.linkedin.com/company/a-listware
- Facebook : www.facebook.com/alistware
2. ScienceSoft
ScienceSoft has been around since 1989 and handles IT consulting along with software development. The company keeps things straightforward with budget adherence, clear communication, and steady delivery quality. It runs a sizable group of IT specialists who cover full project cycles, including cases that involve Microsoft technologies like .NET.
Clients come from various spots, mostly North America but also Europe and other regions. ScienceSoft holds Microsoft Partner status going back years and works on custom applications, integrations, cloud moves, plus modernization efforts. Many projects tie into enterprise needs where .NET fits naturally for backend or full apps.
Faits marquants :
- Operating for decades with a US base
- Large pool of IT pros including seniors
- Microsoft partnership and competencies held long-term
- Experience across industries like healthcare, finance, retail
- Multiple recognitions from Clutch, Inc. 5000, Financial Times
Services :
- Développement de logiciels personnalisés
- .NET application building and modernization
- Migration et intégration dans le nuage
- Conseil en informatique
- Soutien et maintenance des applications
- Renforcement de l'équipe
Informations de contact :
- Site web : www.scnsoft.com
- Téléphone : +1 214 306 68 37 +1 214 306 68 37
- Courriel : contact@scnsoft.com
- Adresse : 5900 S. Lake Forest Drive, Suite 300, McKinney, Dallas area, TX-75070
- LinkedIn : www.linkedin.com/company/sciencesoft
- Facebook : www.facebook.com/sciencesoft.solutions
- Twitter : x.com/ScienceSoft
3. TATEEDA
TATEEDA sets up shop in San Diego and focuses on custom software plus staff augmentation for US and Canadian clients. The setup includes senior engineers spread across locations like Eastern Europe and LATAM for around-the-clock work. It emphasizes quick, quality delivery in areas such as healthcare, biotech, and related high-tech fields.
A good chunk of the talent handles .NET for backend, desktop, or cross-platform stuff like MAUI. Projects often involve rewriting systems or building scalable solutions with integrations.
Faits marquants :
- Headquarters in San Diego, CA
- Strong focus on healthcare and biotech software
- Nearshore options for cost and time zones
Services :
- Custom .NET software development
- Backend and desktop solutions with C#/.NET
- Renforcement du personnel et équipes spécialisées
- Web and mobile app building
- Cloud-native systems
- UI/UX and QA support
Informations de contact :
- Website: tateeda.com
- Phone: +1 (858) 692-0660
- Email: info@tateeda.com
- Address: 7220 Trade Street, Suite 103 San Diego, CA 92121
- LinkedIn: www.linkedin.com/company/tateedaglobal
- Facebook: www.facebook.com/tateedaglobal
- Twitter: x.com/tateedaglobal
- Instagram: www.instagram.com/tateedaglobal
4. Belitsoft
Belitsoft started back in 2004 and sticks to custom software development with a client-first approach. It builds and maintains products across sectors like healthcare, fintech, and insurance. The company has kept a solid client base over the years, with many sticking around long-term.
.NET work includes C# coding, ASP.NET setups, migrations to newer versions like .NET Core, and cross-platform with MAUI. Teams handle full cycles from scratch builds to ongoing support. It gained Microsoft Gold status in application development earlier on and keeps up with modern .NET practices.
Faits marquants :
- Fondée en 2004
- High customer retention rates
- Microsoft-related competencies in the past
- Expertise in healthcare and fintech
- Positive ratings on platforms like Gartner, G2
Services :
- .NET and ASP.NET Core development
- Création d'applications personnalisées
- Migration and modernization
- Augmentation du personnel
- Cloud and AI integrations
- Business intelligence support
Informations de contact :
- Site web : belitsoft.com
- Téléphone : +1 (917) 410-57-57
- Address: 700 N Fairfax St Ste 614, Alexandria, VA, 22314 – 2040, United States
- Courriel : info@belitsoft.com
- LinkedIn : www.linkedin.com/company/belitsoft-llc
- Facebook : www.facebook.com/Belitsoft
- Twitter : x.com/BelitsoftCom
5. Itexus
Itexus runs since 2013 with a base in the US and handles custom software for areas like fintech, healthcare, and insurance. It offers flexible ways to work together, from agile setups with budget checks to fixed scopes or outstaffing teams. The approach often mixes strong project oversight with clear weekly updates.
Developers tackle .NET for enterprise apps, including architecture, upgrades, and maintenance. Projects range from MVPs for startups to full-scale systems with security and scalability in mind. The company stresses clean code and client involvement without overcomplicating things.
Faits marquants :
- US-headquartered with global reach
- Multiple engagement models available
- Portfolio in fintech and healthcare
- Focus on agile processes
- Expérience avec des startups et des entreprises
Services :
- .NET development and hiring
- Custom fintech and enterprise apps
- MVP building
- Conception UI/UX
- DevOps and cloud engineering
- Maintenance des logiciels
- Project audits
Informations de contact :
- Website: itexus.com
- Email: info@itexus.com
- Address: 8 The Green, STE road Dover, DE 19901 USA
- LinkedIn: www.linkedin.com/company/itexus
- Facebook: www.facebook.com/itexus
- Twitter: x.com/ItexusSoft
- Instagram: www.instagram.com/itexus.soft
6. Altoros
Altoros handles custom software development with a focus on cloud-native approaches and innovative tech integrations. The company has experience listed in areas like Agile development that includes .NET alongside other stacks such as Java or Node.js. It runs from a headquarters in California and supports projects that sometimes touch on .NET for web-based solutions or cloud deployments.
Past mentions show involvement in .NET programming through senior developers and training sessions on microservices architecture using .NET. Work often ties into enterprise needs where .NET fits for certain application builds or PaaS environments. Clients span various industries, and the setup allows for full-cycle support on tech choices.
Faits marquants :
- Expertise in Agile software including .NET
- Senior .NET developers on staff
- Training offerings for .NET-based microservices
- Long history in enterprise software
Services :
- Développement de logiciels personnalisés
- .NET application work
- Cloud-native solutions
- Des équipes de développement dédiées
- Intégrations API
- Conseil en technologie
Informations de contact :
- Website: www.altoros.com
- Phone: 1 650 419 3379
- Email: d.castelli@altoros.com
- Address: 4900 Hopyard Rd. Suite 100 Pleasanton, CA 94588
- LinkedIn: www.linkedin.com/company/altoros-systems
- Facebook: www.facebook.com/Altoros
- Twitter: x.com/altoros
7. Emerline
Emerline provides custom software development with strong ties to the Microsoft ecosystem. It covers .NET for building custom applications, including web and desktop setups. The company operates with a pool of developers experienced in .NET versions from older frameworks to current ones like ASP.NET Core.
Services extend to full product cycles where .NET plays a role in backend or cross-platform needs. Many clients come from the US, and the approach includes dedicated teams or individual specialists for .NET tasks. It holds Microsoft partnership status that supports these efforts.
Faits marquants :
- Partenaire de solutions Microsoft
- Developers skilled in .NET ecosystem
- Focus on custom .NET applications
- US-based clients in various sectors
- Experience with Azure integrations
Services :
- .NET development
- Custom web and desktop apps
- Microsoft Power Platform solutions
- Des équipes dédiées
- Conseil en informatique
- Développement de l'informatique en nuage
Informations de contact :
- Site web : emerline.com
- Phone: +1 630 877 1212
- Courriel : info@emerline.com
- Address: 801 Brickell Avenue, Suite 1970, Miami, FL 33131
- LinkedIn : www.linkedin.com/company/emerline
- Facebook : www.facebook.com/emerlinedev
- Instagram: www.instagram.com/emerline.global
8. Glorium Technologies
Glorium Technologies works on full-cycle app and software development for businesses and startups. It includes .NET in its web development stack next to options like Node.js or Java. The company has been active for over a decade and shows up on growth lists in the US.
Projects involve building or modernizing solutions where .NET handles certain backend or enterprise requirements. It offers hiring for .NET developers and stresses scalable apps. Recognition comes from platforms noting its work in custom software.
Faits marquants :
- Listed on Inc. 5000 multiple years
- .NET in web tech stack
- Focus on custom product development
- Awards in software categories
- Remote work experience
Services :
- .NET development
- Web application building
- Solutions logicielles personnalisées
- MVP creation
- Des équipes dédiées
- Services en nuage
Informations de contact :
- Site web : gloriumtech.com
- Téléphone : +1-888-354-0883
- Adresse : 100 Overlook Center, 2nd floor, Princeton, NJ 08540 USA
- LinkedIn : www.linkedin.com/company/glorium-technologies
- Twitter : x.com/Glorium_Tech
9. Fingent
Fingent delivers custom software development with emphasis on enterprise solutions and Microsoft technologies. It uses .NET for modern apps, including .NET Core, C#, ASP.NET, and related tools like WPF. The company bases operations in New York and handles projects that integrate .NET for web, desktop, or scalable systems.
Work includes rebuilding systems or creating new ones with .NET elements for security and performance. It supports full end-to-end processes where .NET fits business needs. Clients get solutions that align with Microsoft platforms.
Faits marquants :
- Microsoft development focus
- Experience with .NET Core and frameworks
- US operations in New York
- Custom enterprise apps
- Long track record in software
Services :
- .NET development
- Développement d'applications web
- Solutions logicielles pour les entreprises
- Microsoft technologies integration
- Custom product building
- Cloud and data services
Informations de contact :
- Site web : www.fingent.com
- Téléphone : +1 (914) 615-9170
- Courriel : info@fingent.com
- Adresse : 235 Mamaroneck Ave Suite #301, White Plains, NY 10605
- LinkedIn : www.linkedin.com/company/fingent-technologies
- Facebook : www.facebook.com/Fingent
- Twitter : x.com/fingent
- Instagram : www.instagram.com/fingentcorporation
10. Softura
Softura focuses on custom application development with a strong emphasis on Microsoft technologies. It supports .NET for building various kinds of apps, from enterprise integrations to mobile backends. The company handles projects in domains like e-commerce, healthcare, insurance, and staffing, often using .NET alongside tools such as SQL Server or BizTalk.
Work includes creating cross-platform solutions and integrating systems like ERP or CRM with custom pieces. It also offers DevOps practices and business intelligence setups that sometimes tie into .NET environments. Clients get full-cycle support, and the setup allows for handling legacy modernizations or new builds where .NET fits the bill.
Faits marquants :
- Long experience with Microsoft stack
- Custom apps in multiple industries
- Integration of enterprise systems
- DevOps and BI capabilities
- Sister companies for specialized platforms
Services :
- .NET custom development
- Intégration des applications d'entreprise
- Mobile backend support
- Solutions d'intelligence économique
- Mise en œuvre de DevOps
- Modernisation des applications
Informations de contact :
- Site web : www.softura.com
- Téléphone : (248) 859-4987
- Adresse : 23570 Haggerty Road, Farmington Hills, Michigan 48335 23570 Haggerty Road, Farmington Hills, Michigan 48335
- LinkedIn : www.linkedin.com/company/softura
- Facebook : www.facebook.com/Softura
- Twitter : x.com/softura
11. Pell Software
Pell Software sticks to custom business software development with everything handled by a fully US-based group. Founded in 2019, it specializes in solutions that cut down on SaaS costs through tailored builds like ERPs, dashboards, or workflow tools. .NET comes up in their stack for web and desktop applications that need strong backend logic.
Direct access to engineers keeps communication straightforward during projects. Many reviews highlight reliable delivery for operational systems and integrations. The approach suits growing businesses looking to replace or supplement off-the-shelf software with something more fitting.
Faits marquants :
- Completely US-based operations
- Founded in 2019
- High number of five-star client reviews
- Awards from Clutch and Techreviewer
- Focus on business software modernization
Services :
- Custom .NET development
- ERP and workflow software
- Data integrations and APIs
- Custom dashboards
- Portails web
- Website support
Informations de contact :
- Site web : www.pellsoftware.com
- Téléphone : (720) 504-1112
- Email: contact@pellsoftware.com
- Address: 1312 17th Street Suite 585 Denver, CO 80202
- LinkedIn : www.linkedin.com/company/pell-software
- Facebook : www.facebook.com/pellsoftware
- Twitter : x.com/PellSoftware
12. Integrative Systems
Integrative Systems runs out of Chicago and provides turnkey custom software development with a heavy lean toward Microsoft technologies. It builds desktop, web, and mobile apps using .NET frameworks along with related tools. The company has stuck around for more than two decades, serving SMBs and larger enterprises across North America.
Projects often involve full engineering from planning to implementation, especially where Microsoft apps need customization or integration. It also touches on legacy systems like IBM iSeries but keeps .NET central for many modern solutions. The style emphasizes close collaboration and quick responses to client needs.
Faits marquants :
- Chicago-based with over two decades of experience
- Strong Microsoft technology focus
- Clients across North America and Canada
- Full software engineering services
- Emphasis on integrity and solution-oriented work
Services :
- .NET web and desktop development
- Custom application building
- Microsoft application customization
- Mobile app support
- Intégrations de systèmes
- Consultancy for established technologies
Informations de contact :
- Site web : www.integrativesystems.com
- Phone: 1.866.468.7974
- Email: contact@integrativesystems.com
- Address: 2500 S Highland Ave, Suite 100, Lombard, Illinois 60148
- LinkedIn : www.linkedin.com/company/integrativesystems
- Facebook : www.facebook.com/integrativesystems1
13. SharpQuest
SharpQuest offers custom software development through a hybrid setup that mixes US project management with offshore coding and testing. Founded back in 2009 in Michigan, it tackles mission-critical business problems for tech companies and enterprises. .NET fits into their work for creating reliable applications that need solid architecture.
The model aims for faster delivery while keeping oversight onshore. Clients tend to stick around for ongoing support after initial projects wrap up. It covers a range of industries where custom software solves specific operational challenges.
Faits marquants :
- Started in 2009 in Troy, Michigan
- Hybrid onshore-offshore approach
- Focus on mission-critical software
- Relations à long terme avec les clients
- Dedicated development center in India
Services :
- Custom .NET software development
- Application architecture and management
- Coding and testing fulfillment
- Support logiciel continu
- Project-specific engagement models
Informations de contact :
- Website: www.sharpquest.com
- Phone: 1-248-268-2592
- Email: info@sharpquest.com
- Address: 850 Stephenson Hwy Suite 102 Troy, MI 48083 USA
- LinkedIn: www.linkedin.com/company/sharpquest
- Twitter: x.com/sharpquest
14. Dualboot Partners
Dualboot Partners concentrates on custom software development with an AI-first method and full product delivery from idea through launch. The site doesn’t highlight .NET specifically in its tech stack or services. It leans more toward other backends like Ruby on Rails or Django, plus frontend options and cloud platforms including Azure.
Projects emphasize business outcomes, strategic guidance, and strong communication rather than particular frameworks. The setup includes US-led product work combined with nearshore engineering for efficiency. Clients get end-to-end support that maps directly to goals without forcing certain tech choices.
Faits marquants :
- AI-integrated development approach
- US-based product leadership
- Focus on business value alignment
- Emphasis on trust and collaboration
- Partenariats à long terme avec les clients
Services :
- Custom software building
- Product strategy and delivery
- Intégration de solutions d'IA
- Modernisation des systèmes existants
- Dedicated engineering support
Informations de contact :
- Website: www.dualbootpartners.com
- LinkedIn: www.linkedin.com/company/dualbootpartners
- Twitter: x.com/DUALBOOT_PTRS
- Instagram: www.instagram.com/dualbootpartners
15. Inoxoft
Inoxoft handles custom software, web, and mobile development with attention to business challenges across startups and established firms. .NET appears in specific projects, particularly .NET Core for scalable backends and web apps integrated with Azure services. Case studies show it used alongside React or Angular for full platforms.
The company runs discovery phases, UI/UX design, QA, and data analytics as part of broader offerings. It sticks to creating value-driven solutions without heavy promotion of one stack. Clients from places like the US benefit from these tailored builds.
Faits marquants :
- Use of .NET Core in case studies
- Azure integrations in projects
- Custom web and backend focus
- Experience since around a decade ago
- Awards in Eastern Europe development
Services :
- .NET Core development
- Création d'applications personnalisées
- Web and mobile solutions
- Assurance qualité
- Conception UI/UX
- Soutien à l'analyse des données
Informations de contact :
- Site web : inoxoft.com
- Téléphone : +12673102646
- Courriel : contact@inoxoft.com
- Adresse : 1601 Market Street, 19th Floor, Philadelphie, PA 19103
- LinkedIn : www.linkedin.com/company/inoxoft
- Facebook : www.facebook.com/inoxoft
- Twitter : x.com/InoXoft_Inc
- Instagram : www.instagram.com/inoxoft_team
16. Vention
Vention provides software development with flexible models like outsourcing, staff augmentation, and dedicated teams. .NET shows up in at least one enterprise case where it supported backend systems alongside other tech. The company covers a wide range of stacks but doesn’t center everything on Microsoft tools.
It has built up experience helping businesses scale and innovate over many years. Projects often involve transforming challenges into workable solutions with emphasis on reliability. The approach suits various company sizes from startups to bigger players.
Faits marquants :
- Long history in software services
- .NET in select enterprise projects
- Multiple engagement options
- Support for scaling businesses
- High client ratings on platforms
Services :
- Développement de logiciels personnalisés
- .NET-based system work
- Des équipes dédiées
- Augmentation du personnel
- Découverte des produits
- Project outsourcing
Informations de contact :
- Site web : ventionteams.com
- Téléphone : +1 (718) 374-5043
- Courriel : hello@ventionteams.com
- Address: 575 Lexington Avenue, 14th Floor, NY 10022
- LinkedIn : www.linkedin.com/company/ventionteams
- Twitter : x.com/ventionteams
- Instagram : www.instagram.com/ventionteams
17. Leobit
Leobit specializes in full-cycle .NET development along with web and mobile apps using the Microsoft stack. It holds Microsoft Solutions Partner status and includes certified pros working on .NET Core, ASP.NET Core, Blazor, and MAUI. Projects cover everything from architecture to ongoing maintenance.
The company started in 2014 with offices in the US and development spots elsewhere. It combines experienced architects with newer talent for creative yet practical results. Many efforts tie into Azure and related services for cloud-based solutions.
Faits marquants :
- Partenaire de solutions Microsoft
- Focus on .NET since founding year
- Multiple .NET project examples
- Certifications in quality and security
- US representative office
Services :
- .NET software development
- Custom web applications
- Mobile app building with .NET MAUI
- Conseil en technologie
- Soutien à l'application
- UI/UX and QA
Informations de contact :
- Site web : leobit.com
- Téléphone : +1512-399-5386 +1512-399-5386
- Email: sales@leobit.com
- Address: Austin, TX – USA, 5555 N. Lamar | Suite L-127, US Headquarters
- LinkedIn : www.linkedin.com/company/leobit
- Facebook : www.facebook.com/LeobitLLC
Conclusion
Wrapping this up, picking the right .NET development partner in the USA really comes down to what your project actually needs right now. Some situations call for deep Microsoft ecosystem knowledge and quick Azure tie-ins, others need someone who can handle legacy code without making a mess of things, and plenty just want straightforward, no-drama delivery on budget. The landscape has a ton of solid options – from pure-play custom shops to those that mix staff augmentation with full-cycle builds – so it pays to match the approach to your timeline, team size, and how much hands-on control you want to keep.
What stands out after looking through all these is how much the conversation has shifted toward real business alignment rather than just writing code. Companies that treat .NET work as an extension of your own goals – whether that’s scaling fast, cutting SaaS costs, or modernizing quietly in the background – tend to leave clients feeling like they actually moved the needle instead of just checking boxes.
At the end of the day, a good .NET services provider doesn’t just deliver features; they help you avoid the usual headaches so you can focus on growing the business. The tech is mature enough that execution and trust matter way more than chasing the newest shiny thing.
