Companies · category

Top IT Service Providers for JavaScript in the USA

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

JavaScript spans more ground than any other language on this list. It runs in every browser, on servers through Node, and inside mobile and desktop applications, so a firm listing it may be doing front-end interface work, back-end services, or both.

The useful clarification is which part of the stack, and with what. Front-end work is dominated by a handful of frameworks and the choice affects hiring for years afterwards. Back-end JavaScript competes with other server languages and is chosen for good reasons and bad ones. Ask why they would pick it for your project specifically — a clear answer indicates a team choosing tools, and a vague one indicates a team using whatever they already know.

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Between them, the 600 best-ranked of these 762 IT service providers cover web development (578), iOS app (402), android (387) and mobile app development (381). They also list work in Washington, New York, California and Oregon. 598 of them have written a profile you can read before you get in touch.

We list more than 750 IT service providers in the USA listed for JavaScript development. The order comes from what each firm publishes and what has been verified about it, never from payment — at the top right now: Untold Studio, Tecziq Solutions and Snaps Technology.

Before you shortlist, check

Which frameworks they use, and why for your project
Automated tests and code review as standard
Performance and accessibility targets agreed up front
How dependencies are kept up to date after launch

Filter by fitbudget, engagement, size and more

SA Technologies Inc.
Custom Software Development · iOS App · React Native
SA Technologies is a renowned IT consulting service provider company in Santa Clara, California.
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Happay - Expense Management Solution for Businesses
Custom Software Development · ERP Software Development · iOS App
Happay is the most widely used and implemented solution in the Indian T&E software space.
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ThirdEye Data Inc.
Web Development · iOS App · UI/UX Design
ThirdEye delivers real-world Artificial Intelligence solutions built on Big Data platforms for scalability and reliability.
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Groupon, Inc.
Web Development · iOS App · UI/UX Design
Groupon (NASDAQ: GRPN) is building the daily habit in local commerce, offering a vast mobile and online marketplace where people discover and save on amazing things to do, see, eat…
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RiskSense, Inc.
Mobile App Development · Web Development · iOS App
RiskSense®, Inc. provides vulnerability prioritization and management to dynamically control and measure cybersecurity risk.
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MicroStrategy
Web Development · Web Design · UI/UX Design
MicroStrategy (Nasdaq: MSTR) is a worldwide leader in enterprise analytics and mobility software.
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ExtraHop
Web Development · Web Design · UI/UX Design · Also in United Kingdom
ExtraHop delivers enterprise cyber analytics that allows you to quickly investigate threats, ensure the delivery of critical applications, and secure your investment in the cloud.
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RingCentral
Web Development · iOS App · Web Design
RingCentral, Inc. (NYSE: RNG) is a global provider of cloud enterprise unified communications and collaboration solutions.
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RateGain
Web Development · Web Design · UI/UX Design
As an innovative, cloud-based technology platform, RateGain helps hospitality and travel companies make more revenue every day.
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HackerEarth
Mobile App Development · Web Development · iOS App
From outside, HackerEarth’s story may seem like one of those much talked about dorm room startups that have shown promise and rapidly growing.
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Forsys Inc.
Custom Software Development · ERP Software Development · Web Development
Forsys is a global technology firm providing a wide spectrum of enterprise, cloud and analytics services.
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Vonage
Web Development · Web Design · IT Services
Vonage (NYSE: VG) is redefining business communications once again.
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Park Place Technologies
Web Development · iOS App · Web Design
Park Place Technologies' maintenance and support set the standard for how the world’s largest data centers drive performance and value from critical IT infrastructures, including…
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Tescomus
Web Development · Web Design · IT Services
Tescom is a software testing firm. Software testing and quality assurance is all we do, it’s all we’ve ever done, and we’ve been doing it for the Atlanta community since 1999.
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AdeptPros, Inc.
Mobile App Development · Web Development · iOS App
AdeptPros is a leader in Mobile and Web 2.0 products, applications, games and solutions development.
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SalesboxAI
Custom Software Development · iOS App · React Native
SalesboxAI is an AI-powered platform that delivers Sales Traction for your Business.
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Maantic Inc.
Custom Software Development · ERP Software Development · iOS App
With global clients and worldwide operations, Maantic Inc. is a leading boutique systems integration company and consulting firm that specializes in the implementation of business…
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Pegasystems
Web Development · Web Design · UI/UX Design
Pega is the leader in cloud software for customer engagement and operational excellence.
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Sumo Logic
Web Development · iOS App · Web Design
Sumo Logic is a secure, cloud-native, machine data analytics service, delivering real-time, continuous intelligence from structured, semi-structured and unstructured data across…
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RotaCloud
Mobile App Development · Web Development · iOS App
RotaCloud is an online rota-planning tool for businesses. As well as being fast and easy to use, it allows staff to check their rotas anywhere they have internet access — plus,…
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Atlassian
Mobile App Development · Web Development · iOS App
We build software that helps teams of all sizes build better products and services.
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BayOne Solutions
Mobile App Development · ERP Software Development · Web Development
BayOne, an information technology outsourcing company specializes in Consulting services, Infrastructure & Application outsourcing, and Application solutions.
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Antmyerp
ERP Software Development · iOS App · React Native
The journey of building Ant My ERP began in 2018 when the team met 100s of SME Business Owners across many segments to understand the challenges they were facing.
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NetSuite
Mobile App Development · Web Development · iOS App
In 1998, NetSuite pioneered the Cloud Computing revolution, establishing the world’s first company dedicated to delivering business applications over the Internet.
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For vendors

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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: UK (478) · India (392) · Germany (214) · Ukraine (145).

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

Top IT Service Providers for JavaScript in the USA

SA Technologies Inc.

Happay - Expense Management Solution for Businesses

ThirdEye Data Inc.

Groupon, Inc.

RiskSense, Inc.

MicroStrategy

ExtraHop

RingCentral

RateGain

HackerEarth

Forsys Inc.

Vonage

Park Place Technologies

Tescomus

AdeptPros, Inc.

SalesboxAI

Maantic Inc.

Pegasystems

Sumo Logic

RotaCloud

Atlassian

BayOne Solutions

Antmyerp

NetSuite