Top 100 JavaScript Development Companies in the United Kingdom

The Best of December 2025

Looking for a top JavaScript developer in the United Kingdom?

If you're hiring a JavaScript developer to help you build or update a website that's responsive and interactive, consider the pros and cons of JavaScript as a programming language. Advantages include its speed because it's executed on the client-side; reduction in server load; and diverse functionality. Disadvantages to consider include security such as bugs on the client-side.

Jump to Most Reviewed Companies

List of the Best United Kingdom JavaScript Developers

1021

WorkSpin Ltd.

(3 Reviews) 5.0

Timeliness
5.0

Service Excellence
5.0

Value
5.0

Would Recommend
5.0

$10,000+

10 - 49 employees

New Barnet, England

WorkSpin Ltd. Is a mobile application development company. They focus on mobile app development, web development, devops managed services, application management & support, and more and were launched in 2020. The firm is based in New Barnet, United Kingdom.

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Clients

Watz Gud

Industries

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1022

ACS | AI Powered Web and Mobile Apps

(15 Reviews) 4.9

Timeliness
5.0

Service Excellence
4.9

Value
4.9

Would Recommend
5.0

$10,000+

50 - 249 employees

London, England

Artificial intelligence company ACS | AI Powered Web and Mobile Apps is in London, England and Nagercoil, India. The midsize agency was launched in 2012. Their team focuses on Artificial Intelligence, Mobile App Development, Custom Software Development, AI Consulting, and more.

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Clients

Unsworth Limited PlainSailing Limited Turnkey Group Enabling Procurement

Industries

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1023

Online Business Solutions

(0 Reviews)

Not yet reviewed.

Undisclosed

Freelancer employees

Great Warley, England

In Great Warley, England, Online Business Solutions is a small social media marketing agency. Their services include Social Media Marketing and Content Marketing.
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