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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Magic Software Enterprises
Web Development · Web Design · IT Services
Magic Software Enterprises empowers customers and partners around the globe with smarter technology that provides a multi-channel user experience.
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Astute IT
Web Development · Web Design · IT Services
Astute IT helps businesses accelerate, transform, and secure technology in a Digital Age. We bring value back into consulting.
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StoryStream
Artificial Intelligence - AI · Web Development · Web Design
StoryStream is the smart content platform for automotive brands.
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Futrli
Web Development · Web Design · IT Services
Futrli is on a quest to move the needle on the small business economy, which spans over 130 million small businesses globally.
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Entopy
Web Development · Web Design · IT Services
Entopy's mission is to fundamentally change supply chain dynamics.
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Meritum Cloud Services
Web Development · Web Design · IT Services
Meritum Cloud Services Ltd (previously trading as EUC Consulting Ltd) is an IT consultancy helping customers in the UK realize the benefits of the Cloud.
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Liberty IT
Web Development · Web Design · IT Services
We’re a bunch of inventors, problem solvers, business brains and tech transformers.
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Allstate NI
Web Development · Web Design · IT Services
Allstate Northern Ireland was established in Belfast in 1998 to provide high-quality software development services and business solutions in support of its parent company, The…
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Chronos Technology Ltd
Web Development · Web Design · IT Services
Sync, timing, phase, and distribution systems are vital to ensure that the multiple, critical services using communications networks are reliable and consistent.
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Tecknuovo
Web Development · Web Design · IT Services
We believe that business transformation will only succeed if it is lead from the inside, which is why we like to operate differently to other consultancies.
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Conga
Web Development · Web Design · IT Services
Conga is the leader in end-to-end Digital Document Transformation.
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Digital Workplace Group
Social Media Marketing · Web Development · Web Design
Digital Workplace Group (DWG) is a strategic partner, covering all aspects of the evolving digital workplace industry through membership, benchmarking and boutique consultancy…
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Computer Futures
Web Development · Web Design · IT Services
Computer Futures is part of SThree PLC, the leading global STEM (Science, Technology, Engineering and Mathematics) recruitment company.
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Movement Professional Search Ltd
Web Development · Web Design · IT Services
Movement are a professional search and talent acquisition firm specialized in providing technology personnel.
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Software Solved
Web Development · Web Design · IT Services
At Software Solved, we create high-quality software. Whether it’s a new software development project, support of a bespoke system or software integration, our work enables…
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Risk Solved Ltd
Web Development · Web Design · IT Services
Risk Solved Ltd is an insurable risk management software specialist.
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Fieldcoin
Web Development · Web Design · IT Services
Creating the first blockchain-based land management marketplace. Exchange and manage land properties from your IT devices.
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Certus Technology Group
Web Development · Web Design · IT Services
At Certus Technology Group we specialize in delivering IT support, hosting and back up solutions to support businesses UK wide and you can rest assured that our accreditation from…
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Breed Reply
Web Development · Web Design · IT Services
Reply \[MTA, STAR: REY\] specializes in the design and implementation of solutions based on new communication channels and digital media.
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Amito
Web Development · Web Design · IT Services
At Amito, we offer an unparalleled hybrid cloud solution. Delivering bespoke cloud, colocation, and connectivity services since 2000 – you can trust us as your hybrid cloud…
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4D Data Centres
Web Development · Web Design · IT Services
4D Data Centres is a UK based colocation provider with facilities in Gatwick, Surrey, and Kent.
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iomart Hosting
Web Development · Web Design · IT Services
iomart Group Plc (AIM: IOM) was one of the first companies to deliver cloud computing in the UK and we continue to lead the way.
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Engage Solutions Group
Web Development · Web Design · IT Services
ESG is the team behind the UK’s leading engagement platform. We help business leaders build connectedness, communication and commitment amongst the two audiences that matter - your…
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Mageside
Web Development · Web Design · UI/UX Design
At Mageside we do Magento development. It is our passion. Magento's work is our focus, our seasoned skill and what we really enjoy.
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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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More on TrustList

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

Top IT Service Providers for JavaScript in the UK

Magic Software Enterprises

Astute IT

StoryStream

Futrli

Entopy

Meritum Cloud Services

Liberty IT

Allstate NI

Chronos Technology Ltd

Tecknuovo

Conga

Digital Workplace Group

Computer Futures

Movement Professional Search Ltd

Software Solved

Risk Solved Ltd

Fieldcoin

Certus Technology Group

Breed Reply

Amito

4D Data Centres

iomart Hosting

Engage Solutions Group

Mageside