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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.

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

Big Switch Networks
Web Development · iOS App · UI/UX Design
Big Switch Networks is the Cloud-First Networking company, bringing public cloud-style networking and hybrid cloud consistency to organizations around the world.
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DesignNBuy, INC.
Mobile App Development · Web Development · iOS App
Design'N'Buy is a dominant Web-to-Print solution provider having clients globally across 50+ countries.
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Mellanox Technologies
Mobile App Development · Web Development · iOS App
Mellanox Technologies (NASDAQ: MLNX) is a leading supplier of end-to-end Ethernet and InfiniBand intelligent interconnect solutions and services for servers, storage, and…
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Indium Software Inc.
Mobile App Development · Web Development · iOS App
Indium Software is a rapidly growing technology solutions company with deep expertise in Digital and QA.
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TmaxSoft Inc.
Web Development · Web Design · IT Services
TmaxSoft is a global software innovator focused on infrastructure and data modernization, with solutions that offer enterprise CIOs viable alternatives to support their global IT…
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Actian
Web Development · Web Design · IT Services
Actian enables some of the most data-Intensive enterprises on earth to run their most mission-critical analytics and data management workloads.
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Broadcom Inc.
Web Development · iOS App · UI/UX Design
Broadcom Inc. is a global infrastructure technology leader built on 50 years of innovation, collaboration, and engineering excellence.
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Webroot
Web Development · Web Design · React Native
Webroot, a Carbonite company, harnesses the cloud and machine learning to reliably predict and protect against cyberattacks in real-time.
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JotForm
Web Development · Web Design · IT Services
JotForm is an online forms platform that helps customers across roles and industries create custom online forms and collect data, all without needing to write a line of code.
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ProofHub
Mobile App Development · Web Development · iOS App
ProofHub lets you stay in ultimate control of your projects, remote teams and clients even when you are on the go.
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OnGraph Technologies Limited
Web Development · iOS App · UI/UX Design
Established in 2008, OnGraph is an award-winning end-to-end product development company.
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InfoCision Management Corporation
iOS App · IT Services · Android
InfoCision is an award-winning contact center partner trusted by leading brands for over 35 years.
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Trintech
Web Development · Web Design · IT Services
At Trintech, we pride ourselves on providing enterprise-class financial solutions for the Record to Report process to organizations committed to transforming their financial…
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Fuze
Web Development · Web Design · IT Services
Fuze is a global cloud communications and collaboration software platform for the enterprise.
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Confluent
Web Development · iOS App · UI/UX Design
Confluent, founded by the original creators of Apache Kafka®, pioneered the enterprise-ready event streaming platform.
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GLG
Web Development · iOS App · UI/UX Design
GLG is the world’s knowledge marketplace. We connect decision makers who want the advantage of powerful insight to people with first-hand experience, so they can act with the…
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MSC Software
Web Development · iOS App · UI/UX Design
MSC Software & Hexagon is a global leader in sensor, software, and autonomous solutions.
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Agilent Technologies
Web Development · iOS App · UI/UX Design
Analytical scientists and clinical researchers worldwide rely on Agilent to help fulfill their most complex laboratory demands.
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Ellicium Solutions Inc.
Mobile App Development · Web Development · iOS App
Founded in 2012, Ellicium is a young and passionate Big Data and Data Science company.
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Vsynergize
Web Development · iOS App · UI/UX Design
Your Most Reliable Growth Partner: At VSynergize, we do more than just lead generation and Demand Generation solutions.
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Qualys
Mobile App Development · Web Development · iOS App
Qualys, Inc. (NASDAQ: QLYS) is a pioneer and leading provider of cloud-based security and compliance solutions with over 10,300 customers in more than 130 countries, including a…
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Cherwell Software
Web Development · UI/UX Design · Web Design
Cherwell empowers organizations to improve service experiences and automate workflows using data that stretches across contexts and business units.
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Icertis
iOS App · UI/UX Design · E-Commerce Development
The velocity of business is increasing. Change is the only constant. The rewards – and the risks – have never been higher.
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Balbix, Inc.
Web Development · iOS App · UI/UX Design
Enable organizations to transform their cybersecurity posture and quantifiably reduce their breach risk. The enterprise attack surface is massive and growing rapidly.
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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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More it service providers rankings

Every other way we rank it service providers — by what they do and where they are.

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More on TrustList

Everything here links back to the same verified catalogue. Pick your next stop.

Top IT Service Providers for .NET in the USA

Big Switch Networks

DesignNBuy, INC.

Mellanox Technologies

Indium Software Inc.

TmaxSoft Inc.

Actian

Broadcom Inc.

Webroot

JotForm

ProofHub

OnGraph Technologies Limited

InfoCision Management Corporation

Trintech

Fuze

Confluent

GLG

MSC Software

Agilent Technologies

Ellicium Solutions Inc.

Vsynergize

Qualys

Cherwell Software

Icertis

Balbix, Inc.