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Top IT Service Providers for .NET in the USA

713 IT service providers ranked by rating, review volume and listing quality.

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Between them, the 600 best-ranked of these 713 IT service providers cover web development (568), android (472), iOS app (463) and PHP (457). They also list work in New York, India and United Kingdom. 600 of them have written a profile you can read before you get in touch.

We list more than 700 IT service providers in the USA listed for .NET development. The order comes from what each firm publishes and what has been verified about it, never from payment — at the top right now: SingleMind, INAP and UST Global.

Before you shortlist, check

  • Work on current .NET versions, not only legacy .NET Framework
  • A plan for moving any old .NET Framework code forward
  • Automated tests and deployment you can run yourself
  • That you own the code and the build pipeline
Filter by fitbudget, engagement, size and more

Only businesses that have told TrustList match a filter. Filters never change the order or a score.

  1. AC

    Appian Corporation

    Mobile App Development · Web Development · iOS App

    Before Appian was a company, it was an idea. Not about a product or a market, but about the culture needed to sustain innovation and value.

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  2. AO

    Access One, Inc.

    Web Development · iOS App · Web Design

    Access One is a business technology services and communications provider, dedicated to world-class technologies and award-winning client experience.

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  3. 27

    [24]7.ai

    Custom Software Development · Web Development · iOS App

    \[24\]7.ai is redefining the way companies interact with consumers.

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  4. SS

    Strategic Systems International

    iOS App · UI/UX Design · E-Commerce Development

    Strategic Systems International (SSI) is a Chicago-headquartered Advanced Analytics and Software Engineering firm that builds data-driven applications for Tech Companies and…

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  5. E

    Estateably

    Mobile App Development · Web Development · iOS App

    Estateably is an estate settlement platform that allows financial professionals to dramatically expedite the estate settlement process through the digitization of paper-based…

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  6. SM

    SolarWinds MSP

    Web Development · iOS App · Web Design

    SolarWinds® MSP delivers comprehensive, scalable IT service management solutions to empower MSPs of every size and scale worldwide to create highly efficient and profitable…

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  7. P

    PROMATIS

    Web Development · iOS App · UI/UX Design

    PROMATIS provides consulting for corporate strategies and business management and combines it with IT concepts and implementation-oriented project management.

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  8. PP

    Piwik PRO

    Mobile App Development · Web Development · iOS App

    Piwik PRO Analytics Suite provides analytics, tag management, content personalization and data activation tools tailored to the individual needs of enterprise clients.

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  9. U

    Userpilot

    Web Development · iOS App · UI/UX Design

    Userpilot helps product & customer success teams increase user adoption through behavior-driven product experiences. Code-Free.

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  10. H

    Hoylu

    iOS App · UI/UX Design · Web Design

    The idea for Hoylu started as a research work at the University of Applied Sciences in Austria.

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  11. I

    Infor

    ERP Software Development · UI/UX Design · IT Services

    Infor is a global company that provides enterprise software products for every aspect of the business.

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  12. C

    Canto

    iOS App · UI/UX Design · E-Commerce Development

    When Canto was founded 25 years ago, we couldn’t have imagined how far the industry would come.

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  13. S

    Silexica

    Mobile App Development · Web Development · iOS App

    Silexica provides software development solutions that enable technology companies to take intelligent products such as autonomous cars from concept to deployment.

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  14. L

    LANSA

    Web Development · Web Design · IT Services

    Thousands of customers across the globe trust LANSA to help them rapidly build enterprise-grade applications.

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  15. M

    Mendix

    Mobile App Development · Web Development · iOS App

    Mendix, a Siemens business and the global leader in no-code/low-code application development for the enterprise, is fundamentally reinventing the way applications are built in the…

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  16. R

    Redwerk

    Mobile App Development · Web Development · iOS App

    Since 2005 we establish and service fully managed dedicated software development teams in Ukraine, as well as deliver custom software development projects for our customers…

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  17. O

    OutSystems

    Mobile App Development · Web Development · iOS App

    Thousands of customers worldwide trust OutSystems, the number one low-code platform for rapid application development.

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  18. C

    Collibra

    iOS App · UI/UX Design · Web Design

    Collibra is the Data Intelligence company. We accelerate trusted business outcomes by connecting the right data, insights, and algorithms to all Data Citizens.

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  19. P

    Parasoft

    Web Development · UI/UX Design · Web Design

    Parasoft provides innovative tools that automate time-consuming testing tasks and provide management with intelligent analytics necessary to focus on what matters.

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  20. C

    Carta

    Web Development · iOS App · Web Design

    We’re on a mission to create more owners. By building the global ownership management platform, we’re changing how companies, investors, law firms, and employees manage equity.

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  21. B

    Bldbox

    iOS App · UI/UX Design · E-Commerce Development

    At Bldbox, we are introducing predictive analytics into real estate development and construction.

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  22. QM

    QA Mentor - Software Testing Expert

    Mobile App Development · Web Development · iOS App

    Founded in 2010 and based in New York, QA Mentor, Inc. is a multi-award winning ISO 27001:2013 and ISO 9001:2015 certified leading independent software testing company…

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  23. S

    StarNavi

    Mobile App Development · Web Development · iOS App

    We’re a global software development agency with vast expertise in Python, and JavaScript.

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  24. AS

    Aionys Software Development

    Mobile App Development · Web Development · iOS App

    We have met, and this means you know what you are looking for. There is an issue and you need a solution.

    Write a review

For vendors

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The order is earned: ratings, verified reviews and listing quality decide it, and nobody can pay to move up. There are two ways to stand out, and each one says what it is.

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Sponsor the .NET ranking

Paid · always labelled

  • A Sponsored card above the .NET ranked list
  • Marked Sponsored, and it never changes the order
  • Booked by the month; cancel any time
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How is this ranking worked out?

The order comes from what each firm publishes and what has been verified about it, and never from payment:

  • Profile completeness: the details a buyer needs to judge a firm — what it does, who it serves, how it prices, who it has worked for
  • Earned trust: verification, awards and the other checks a firm has actually passed
  • Client reviews, where they exist: the rating is smoothed, so one five-star review cannot outrank a firm with a hundred good ones, and volume counts with diminishing returns

Client reviews are still rare across this catalogue, so on most lists today the order is set by the first two. A firm near the top is the best-documented and best-verified one we hold, which is not the same claim as the best one to hire. Use the list to build a shortlist, then check the firms yourself.

Sponsored listings are labelled and shown apart from this list. How rankings work

Only firms whose profile names the USA are counted here, so a firm that lists a town but no country is not yet included.

Where else can I look?

The same list elsewhere: India (465) · UK (457) · Germany (222) · Canada (143).

Other specialisms in the USA: e-commerce (1,539) · Android app development (1,530) · iOS app development (1,452) · UI/UX design (1,355) · PHP development (946).

Every IT service provider in the USA: the full list.

Every category in the USA: the USA country page.

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