Companies · category

Top IT Service Providers for JavaScript in the UK

477 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 476 best-ranked of these 477 IT service providers cover web development (464), web design (380), PHP (304) and .NET (288). They also list work in London and United States of America. 473 of them have written a profile you can read before you get in touch.

We list more than 450 IT service providers in the UK 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: Zepto Systems ltd, Marzee Labs and Webcurl LTD.

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

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everysite / TLR Ltd
Web Development · Web Design · Software Development
Founded in 1991, everysite provides business and technology services to government and commercial organizations in the United Kingdom and internationally that focus on farming,…
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Autologyx
Mobile App Development · Web Development · Web Design
autologyx digital operations platform enables enterprise businesses to automate complex mission-critical processes faster and more cost-effectively than existing automation…
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HooYu
Web Development · Web Design · IT Services
At HooYu, we are specialists in building database check and identity confirmation products and our platforms are used by millions of users each month.
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Inatech
Search Engine Optimization · IT Services · UI/UX Design
Established in 2002, we are a global provider of intelligent cloud ETRM and fuel management software to the physical oil trading, bunkering and shipping industries.
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AIA Worldwide
Social Media Marketing · Web Development · Web Design
AIA Worldwide's industry-leading blend of imagination, invention, and ingenuity is now available at 51 locations across the globe.
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We Build Bots
Web Development · Web Design · UI/UX Design
We Build Bots (WBB) is a multi-award-winning AI GovTech startup. We help public sector organizations save time and money through AI-powered citizen service automation.
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nChain
Web Development · Web Design · IT Services
nChain believes that Bitcoin SV (BSV) is the original Bitcoin and is the global public blockchain of the future.
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Tryzens
Web Development · Web Design · IT Services
Since 2004, we've been trusted by retail’s biggest names to plan, implement and maintain eCommerce systems that drive business performance, and to develop multichannel retail…
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Limpio Office Solutions
Mobile App Development · Web Development · Web Design
Whether you need a single desktop printer delivered overnight or a full Managed Print Service designed and implemented, Limpio can deliver.
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Inflectiontech Limited
Web Development · Web Design · IT Services
InflectionTech specialise in planning and managing the delivery of best in class data centre builds, white space build-outs, upgrades and migrations.
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Griffiths Waite
Mobile App Development · Web Development · Web Design
Griffiths Waite specializes in developing solutions that are unique to each company.
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WM Promus
Web Development · Web Design · IT Services
WM Promus is a team of IT Operations Management experts dedicated to delivering digital transformation consultancy and solutions using the best of DevOps technologies.
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Inawisdom
Web Development · Web Design · IT Services
Inawisdom's focus is on differentiation through data exploitation, using the latest enterprise-ready techniques in predictive analytics, machine learning, natural language…
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FiveAI
Artificial Intelligence - AI · Web Development · Web Design
FiveAI is developing the software to power shared, self-driving vehicle services in Europe.
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COGWORKS
Mobile App Development · Search Engine Optimization · Web Development
The Cogworks is a leading Umbraco Gold Partner and user experience, specialist.
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Limesharp
Web Development · Web Design · UI/UX Design
We are Limesharp. We're a London-based web development and design agency specializing in building beautiful Magento e-commerce stores.
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Seldon
Artificial Intelligence - AI · Web Development · Web Design
With roots going back to 2011, Seldon Technologies Ltd was founded in 2014 with a simple yet ambitious aim: accelerate the adoption of machine learning to solve some of the world’s…
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Dynamo North East
Web Development · Web Design · IT Services
Dynamo is a volunteer led group set up with the core mission to ‘Grow the North East IT Economy’ through collaboration, innovation, skills.
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Logic Room
Web Development · Web Design · IT Services
We help companies build scalable JavaScript and TypeScript apps.
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Fidessa
Web Development · Web Design · IT Services
Exceptional trading, investment and information solutions for the world's financial community.
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Alchemy Technology Services
Web Development · Web Design · IT Services
Alchemy is a European centre of excellence for insurance software implementation, supporting the digitisation of the global insurance industry.
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Pushologies Ltd
Mobile App Development · Web Development · UI/UX Design
Pushologies is the marriage of both, empowering content owners and marketers like never before.
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Silicon Brighton
Web Development · Web Design · IT Services
A Brighton based collaborative technical knowledge share and networking platform, driven forward by an organization with the contacts in place to ensure sessions are well attended,…
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Ecrebo
Web Development · Web Design · IT Services
Ecrebo is a technology company that enables the real-time, cost-effective delivery of personalized offers and messages at point of sale on paper and digital receipts.
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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 UK 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: USA (762) · India (392) · Germany (214) · Ukraine (145).

Other specialisms in the UK: UI/UX design (941) · e-commerce (854) · Android app development (812) · iOS app development (800) · WordPress (752).

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

Every category in the UK: the UK 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 UK

everysite / TLR Ltd

Autologyx

HooYu

Inatech

AIA Worldwide

We Build Bots

nChain

Tryzens

Limpio Office Solutions

Inflectiontech Limited

Griffiths Waite

WM Promus

Inawisdom

FiveAI

COGWORKS

Limesharp

Seldon

Dynamo North East

Logic Room

Fidessa

Alchemy Technology Services

Pushologies Ltd

Silicon Brighton

Ecrebo