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. A-Listware
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.
Wichtigste Highlights:
- 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
Dienstleistungen:
- IT-Outsourcing Personalbeschaffung
- Remote development team building
- Einstellung und Verwaltung von Entwicklern
- .NET development support
- Project team extension
Kontaktinformationen:
- Website: a-listware.com
- Telefon: +1 (888) 337 93 73
- E-Mail: info@a-listware.com
- Anschrift: North Bergen, NJ 07047, USA
- LinkedIn: www.linkedin.com/company/a-listware
- Facebook: www.facebook.com/alistware
2. WissenschaftSoft
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.
Wichtigste Highlights:
- 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
Dienstleistungen:
- Entwicklung kundenspezifischer Software
- .NET application building and modernization
- Cloud-Migration und -Integration
- IT-Beratung
- Unterstützung und Wartung von Anwendungen
- Verstärkung des Teams
Kontaktinformationen:
- Website: www.scnsoft.com
- Telefon: +1 214 306 68 37
- E-Mail: contact@scnsoft.com
- Anschrift: 5900 S. Lake Forest Drive, Suite 300, McKinney, Region Dallas, 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.
Wichtigste Highlights:
- Headquarters in San Diego, CA
- Strong focus on healthcare and biotech software
- Nearshore options for cost and time zones
Dienstleistungen:
- Custom .NET software development
- Backend and desktop solutions with C#/.NET
- Personalaufstockung und engagierte Teams
- Web and mobile app building
- Cloud-native systems
- UI/UX and QA support
Kontaktinformationen:
- 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.
Wichtigste Highlights:
- Gegründet im Jahr 2004
- High customer retention rates
- Microsoft-related competencies in the past
- Expertise in healthcare and fintech
- Positive ratings on platforms like Gartner, G2
Dienstleistungen:
- .NET and ASP.NET Core development
- Erstellung benutzerdefinierter Anwendungen
- Migration and modernization
- Aufstockung des Personals
- Cloud and AI integrations
- Business intelligence support
Kontaktinformationen:
- Website: belitsoft.de
- Telefon: +1 (917) 410-57-57
- Address: 700 N Fairfax St Ste 614, Alexandria, VA, 22314 – 2040, United States
- E-Mail: 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.
Wichtigste Highlights:
- US-headquartered with global reach
- Multiple engagement models available
- Portfolio in fintech and healthcare
- Focus on agile processes
- Erfahrung mit Start-ups und Unternehmen
Dienstleistungen:
- .NET development and hiring
- Custom fintech and enterprise apps
- MVP building
- UI/UX-Entwurf
- DevOps and cloud engineering
- Wartung der Software
- Project audits
Kontaktinformationen:
- 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.
Wichtigste Highlights:
- Expertise in Agile software including .NET
- Senior .NET developers on staff
- Training offerings for .NET-based microservices
- Long history in enterprise software
Dienstleistungen:
- Entwicklung kundenspezifischer Software
- .NET application work
- Cloud-native solutions
- Engagierte Entwicklungsteams
- API-Integrationen
- Technologie-Beratung
Kontaktinformationen:
- 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.
Wichtigste Highlights:
- Microsoft-Lösungspartner
- Developers skilled in .NET ecosystem
- Focus on custom .NET applications
- US-based clients in various sectors
- Experience with Azure integrations
Dienstleistungen:
- .NET development
- Custom web and desktop apps
- Microsoft Power Platform solutions
- Engagierte Teams
- IT-Beratung
- Entwicklung der Cloud
Kontaktinformationen:
- Website: emerline.com
- Phone: +1 630 877 1212
- E-Mail: 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.
Wichtigste Highlights:
- Listed on Inc. 5000 multiple years
- .NET in web tech stack
- Focus on custom product development
- Awards in software categories
- Remote work experience
Dienstleistungen:
- .NET development
- Web application building
- Individuelle Software-Lösungen
- MVP creation
- Engagierte Teams
- Cloud-Dienste
Kontaktinformationen:
- Website: gloriumtech.de
- Telefon: +1-888-354-0883
- Anschrift: 100 Overlook Center, 2. Stock, 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.
Wichtigste Highlights:
- Microsoft development focus
- Experience with .NET Core and frameworks
- US operations in New York
- Custom enterprise apps
- Long track record in software
Dienstleistungen:
- .NET development
- Entwicklung von Webanwendungen
- Softwarelösungen für Unternehmen
- Microsoft technologies integration
- Custom product building
- Cloud and data services
Kontaktinformationen:
- Website: www.fingent.com
- Telefon: +1 (914) 615-9170
- E-Mail: 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.
Wichtigste Highlights:
- Long experience with Microsoft stack
- Custom apps in multiple industries
- Integration of enterprise systems
- DevOps and BI capabilities
- Sister companies for specialized platforms
Dienstleistungen:
- .NET custom development
- Integration von Unternehmensanwendungen
- Mobile backend support
- Business Intelligence-Lösungen
- DevOps-Implementierung
- Modernisierung von Anwendungen
Kontaktinformationen:
- Website: www.softura.com
- Telefon: (248) 859-4987
- Adresse: 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.
Wichtigste Highlights:
- Completely US-based operations
- Founded in 2019
- High number of five-star client reviews
- Awards from Clutch and Techreviewer
- Focus on business software modernization
Dienstleistungen:
- Custom .NET development
- ERP and workflow software
- Data integrations and APIs
- Custom dashboards
- Web-Portale
- Website support
Kontaktinformationen:
- Website: www.pellsoftware.com
- Telefon: (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.
Wichtigste Highlights:
- 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
Dienstleistungen:
- .NET web and desktop development
- Custom application building
- Microsoft application customization
- Mobile app support
- Systemintegrationen
- Consultancy for established technologies
Kontaktinformationen:
- Website: 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.
Wichtigste Highlights:
- Started in 2009 in Troy, Michigan
- Hybrid onshore-offshore approach
- Focus on mission-critical software
- Langfristige Kundenbeziehungen
- Dedicated development center in India
Dienstleistungen:
- Custom .NET software development
- Application architecture and management
- Coding and testing fulfillment
- Laufende Software-Unterstützung
- Project-specific engagement models
Kontaktinformationen:
- 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.
Wichtigste Highlights:
- AI-integrated development approach
- US-based product leadership
- Focus on business value alignment
- Emphasis on trust and collaboration
- Langfristige Kundenpartnerschaften
Dienstleistungen:
- Custom software building
- Product strategy and delivery
- Integration von AI-Lösungen
- Modernisierung von Altsystemen
- Dedicated engineering support
Kontaktinformationen:
- 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.
Wichtigste Highlights:
- 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
Dienstleistungen:
- .NET Core development
- Erstellung benutzerdefinierter Anwendungen
- Web and mobile solutions
- Sicherung der Qualität
- UI/UX-Entwurf
- Unterstützung bei der Datenanalyse
Kontaktinformationen:
- Website: inoxoft.com
- Telefon: +12673102646
- E-Mail: contact@inoxoft.com
- Anschrift: 1601 Market Street, 19. Stock, Philadelphia, 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.
Wichtigste Highlights:
- Long history in software services
- .NET in select enterprise projects
- Multiple engagement options
- Support for scaling businesses
- High client ratings on platforms
Dienstleistungen:
- Entwicklung kundenspezifischer Software
- .NET-based system work
- Engagierte Teams
- Aufstockung des Personals
- Produktentdeckung
- Project outsourcing
Kontaktinformationen:
- Website: ventionteams.com
- Telefon: +1 (718) 374-5043
- E-Mail: 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.
Wichtigste Highlights:
- Microsoft-Lösungspartner
- Focus on .NET since founding year
- Multiple .NET project examples
- Certifications in quality and security
- US representative office
Dienstleistungen:
- .NET software development
- Custom web applications
- Mobile app building with .NET MAUI
- Technologie-Beratung
- Unterstützung der Anwendung
- UI/UX and QA
Kontaktinformationen:
- Website: leobit.com
- Telefon: +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
Schlussfolgerung
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.
