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.

Want your company here?

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

RT
Rockers Technology
Mobile App Development · Web Development · iOS App
Rockers Technology is a leading software development company offering top-rated app development services to clients across the globe.
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1T
128 Technology
Web Development · iOS App · Web Design
We are serial entrepreneurs, die-hard technologists, and principled pragmatists.
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S
Scrapinghub
Web Development · iOS App · Web Design
Scrapinghub provides leading technology and consulting services to deliver successful web crawling and data processing solutions.
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P
Podia
Web Development · iOS App · Web Design
We empower creative entrepreneurs to make a living doing what they love.
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RU
Remote Utilities LLC
Web Development · iOS App · Web Design
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MS
Main Sequence Technology
Web Development · iOS App · Web Design
Main Sequence Technology, Inc. is one of the world's most successful developers of applicant tracking and staffing software.
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JI
J2 Innovations
Web Development · iOS App · Web Design
J2 Innovations is a fast-growing, innovative software development company based in California that created FIN Framework, which is a state-of-the-art open platform for building…
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C
Collibra
iOS App · Web Design · UI/UX 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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P
Parasoft
Web Development · Web Design · UI/UX 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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TD
The Designory
Social Media Marketing · Web Development · Web Design
Most people would describe us as a global, full-service agency. But we think of ourselves as marketers with great stories to tell.
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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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AL
Aternity LLC
iOS App · Web Design · UI/UX Design
Riverbed, The Digital Performance Company, is united in our purpose of Advancing the Human Experience in the Digital World.
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OI
OuterBox, Inc.
Web Development · Web Design · UI/UX Design
OuterBox is a nationwide leader in website design, eCommerce and SEO services. Founded in 2004, OuterBox now offers a team of nearly 50 industry experts under one roof.
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AM
Affiliate Marketing
Web Development · iOS App · Web Design
Over the past decade, online marketing agencies have flooded retailers with plans and strategies.
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A
Agiliway
iOS App · UI/UX Design · E-Commerce Development
Agiliway is a software development outsourcing and consulting company with offices located in Lviv and Chernivtsi, Ukraine and in Austin, Texas.
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ES
Eltima Software
Mobile App Development · Web Development · iOS App
Eltima Software is a global software Development Company, specializing primarily in serial communication, mobile applications and software for all major platforms including Mac OS,…
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Z
Zoovu
Artificial Intelligence - AI · Web Development · Web Design
Zoovu is the ultimate AI-driven conversational search platform helping customers find the things they’re looking for by having a conversation - not by typing or talking keywords!
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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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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.
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GD
Global Data Technologies
Mobile App Development · Web Development · iOS App
Global Data Technologies is a proud business solutions provider.
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F
Fyutura
Mobile App Development · Web Development · iOS App
Fyutura is a software development company from Ukraine. We work with big companies as well as startups around the world.
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CC
Code & Care
Mobile App Development · Web Development · iOS App
Code & Care is a service-oriented company that has a goal to provide software development services on demand. We believe that our customers' success is our success.
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PI
Planview, Inc.
Web Development · iOS App · Web Design
Planview enables organizations to get the most out of their resources and achieve their goals.
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CS
CobbleStone Systems
Web Development · iOS App · Web Design
CobbleStone Software is a best-of-breed, global provider of enterprise contract lifecycle management and eProcurement software.
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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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More on TrustList

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

Top IT Service Providers for JavaScript in the USA

Rockers Technology

128 Technology

Scrapinghub

Podia

Remote Utilities LLC

Main Sequence Technology

J2 Innovations

Collibra

Parasoft

The Designory

Carta

Aternity LLC

OuterBox, Inc.

Affiliate Marketing

Agiliway

Eltima Software

Zoovu

Bldbox

Aionys Software Development

Global Data Technologies

Fyutura

Code & Care

Planview, Inc.

CobbleStone Systems