Top 100 JavaScript Development Companies in the United Kingdom
The Best of December 2025Looking 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.
To assist you in your search for a partner, we’ve compiled this list of the top JavaScript development agencies in United Kingdom. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best United Kingdom JavaScript Developers
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301$1,000+50 - 249 employeesSlough, EnglandTechno Infonet is an ERP consulting and SI company founded in 2004. The agency provides ERP consulting and SI, Custom Software Development, Mobile App Development, E-Commerce Development, and more and has a midsize team.Read More
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Ahwar AppIndustries
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302$25,000+2 - 9 employeesLondon, EnglandHeadquartered in London, England, Line20 Digital is a website development firm. They offer Web Development, Cybersecurity, Web Design, and UX/UI Design and were launched in 2016.Read More
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IGN Entertainment - Ziff DavisIndustries
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303Undisclosed2 - 9 employeesBollington, EnglandRead More
ACS is a software house based in Bollington, England, and founded in 2099. Their team of no more than 10 specializes in custom software development, mobile app development, and big data consulting solutions for clients in the fields of hospitality and healthcare.
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Common GoalIndustries
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304$5,000+50 - 249 employeesManchester, EnglandTrunkBBI is a midsize website development company based in Manchester, England and Leeds, England. The team provides Web Development and Mobile App Development.Read More
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305$5,000+10 - 49 employeesLondon, EnglandWazobia Technologies is a London, England-based custom software development firm. The small team provides Custom Software Development, Web Development, Mobile App Development, Enterprise App Modernization, and more and was launched in 2019.Read More
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306$10,000+10 - 49 employeesLondon, EnglandRead More
TensionX is a software company founded in 2020 with fewer than 50 experts. They provide custom software and web development solutions from their office in London. They mainly work with small and mid-market firms in the fields of advertising and business services.
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CloudKiiIndustries
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307$10,000+50 - 249 employeesLondon, EnglandRead More
Located in London, United Kingdom and Lahore, Pakistan, Devbox is a web development company. The midsize agency was founded in 2011. Their team focuses on web development, custom software development, IT staff augmentation, mobile app development, and more.
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308$1,000+10 - 49 employeesPreston, EnglandInfoVibes is an IT staff augmentation company launched in 2023. They are located in Preston, England and Dover, Delaware and have a small team. Their services include IT staff augmentation, BI & big data consulting & SI, IT managed services, Custom Software Development, and more.Read More
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Bunzl Retail Supplies, UK Lightning Packaging, UK Woodway, UK Keenpac, UKIndustries
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309$10,000+50 - 249 employeesLondon, EnglandUnibrix is a midsize web development firm. Based in Cherkasy, Ukraine and London, England, the company was founded in 2013. Their services include Web Development, Custom Software Development, Mobile App Development, Application Testing, and more.Read More
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310$25,000+10 - 49 employeesLondon, EnglandRead More
CobbleWeb is a small custom software development company. They focus on custom software development, ux/ui design, business consulting, mobile app development, and more and were launched in 2012.
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311$1,000+Freelancer employeesBristol , EnglandRead More
Web design agency and website development company Benedict Wallis - Web Developer was launched in 2016. The small team focuses on web design and web development. The company is located in Bristol , United Kingdom.
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312$1,000+250 - 999 employeesLondon, EnglandSynoviq is a social media marketing firm. They are located in Newark, Delaware; Melbourne, Australia; London, England and Kolkata, India and have a midsize team that provides Social Media Marketing, Search Engine Optimization, Web Development, Ecommerce Marketing, and more. The agency was established in 2011.Read More
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313$1,000+50 - 249 employeesLondon, EnglandTask Virtual is a SEO company. The midsize Kolkata, India-based firm was founded in 2016. Their services include Search Engine Optimization, Back Office Outsourcing, Social Media Marketing, Content Marketing, and more.Read More
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314$5,000+50 - 249 employeesLytchett Matravers, EnglandConvertt.co, a web design agency and web development firm, was established in 2023. Their midsize team is headquartered in Lytchett Matravers, England and Lytchett Matravers, England. The company offers Web Design and Web Development.Read More
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315$10,000+10 - 49 employeesLondon, EnglandFhoke is a branding agency launched in 2008. Located in Salisbury, United Kingdom, their small team focuses on branding, web development, print design, and web design.Read More
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Travis PerkinsIndustries
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316$1,000+2 - 9 employeesCincinnati, OHFounded in 1997, AppWT LLC ™ (Digital Marketing & Design) is a social media marketing firm. They are headquartered in Livonia, Michigan; Livonia, Michigan; Flint, Michigan and Cincinnati, Ohio and have a small team. Their services include Social Media Marketing, Content Marketing, Search Engine Optimization, Web Design, and more.Read More
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Aaron's Communications LLC, Burnside, KY, USAIndustries
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317$10,000+2 - 9 employeesLondon, England11:11 Studio is a branding company launched in 2023. Their small team is based in London, England. The company specializes in Branding, Web Design, Content Marketing, UX/UI Design, and more.Read More
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318$25,000+2 - 9 employeesLondon, EnglandRead More
Pixie Labs is a London, United Kingdom-based custom software development firm. The small company was launched in 2013. Their services include custom software development, Artificial Intelligence, e-commerce development, ux/ui design, and more.
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319$10,000+10 - 49 employeesSouthampton, EnglandRead More
Rareloop, a custom software development firm, was launched in 2011. The agency specializes in custom software development, ux/ui design, mobile app development, web design, and more and has a small team. The agency is located in Southampton, United Kingdom.
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320$10,000+10 - 49 employeesLondon, EnglandRead More
Circle Square is a software development company located in London. Founded in 2016, they have roughly 5 teammates. Their services include IT staff augmentation and product design as well as web and app development.
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YOW -
321$10,000+2 - 9 employeesFleet, EnglandRead More
Launched in 2008, Deuce Creative is a small branding firm located in Aldershot, United Kingdom. Their services include branding, digital strategy, marketing strategy, search engine optimization, and more.
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Make-a-Wish Foundation UK -
322$10,000+50 - 249 employeesLondon, EnglandRead More
UMM Digital is a hybrid branding agency with headquarters in Chennai, India with other offices in the UAE and Belgium. Since its start in 2007, the team of about 35 has provided web and mobile app development, UX/UI design, digital strategy, and branding services.
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Playmonk eSportsIndustries
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323$25,000+10 - 49 employeesLondon, EnglandRead More
Mobile application development firm Nordstone was launched in 2018. The firm specializes in mobile app development, ux/ui design, and application management & support and has a small team. The firm is located in London, United Kingdom.
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324$1,000+10 - 49 employeesLondon, EnglandEstablished in 2016, Bent Oak Systems is a software development company. The agency specializes in custom software development, web development, mobile app development, and staffing and has a small team. The agency is in London, United Kingdom.Read More
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325$100,000+50 - 249 employeesLondon, EnglandInfinity Technologies is a midsize custom software development firm. The London, England-based company was founded in 2003. Their services include Custom Software Development, Web Development, Mobile App Development, and IT staff augmentation.Read More
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326$1,000+10 - 49 employeesLondon, EnglandLoudlyDev Global Solutions is a website development company. Launched in 2018, the small company is in Lahore, Pakistan; London, England and Duluth, Georgia. Their team focuses on Web Development, IT staff augmentation, Artificial Intelligence, UX/UI Design, and more.Read More
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327$5,000+2 - 9 employeesLondon, EnglandFounded in 2018, WeCodePlus is a web development firm. Their small team is in London, England. Their services include Web Development, Web Design, E-Commerce Development, and Mobile App Development.Read More
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WeAreAubeIndustries
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328$25,000+10 - 49 employeesBirmingham, EnglandLaunched in 2013, Adaptable is a Digital Strategy company. Their team specializes in Digital Strategy and Web Design.Read More
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Utilita Energy Norfolk Coast Protected Landscape Leukaemia UK Elta GroupIndustries
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329$10,000+2 - 9 employeesLondon, EnglandRead More
Small custom software development firm inCode Systems, is headquartered in London, United Kingdom. The team specializes in custom software development, enterprise app modernization, ux/ui design, e-commerce development, and more.
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330$25,000+10 - 49 employeesPeterborough, EnglandArtificially is a website development company launched in 2020. The firm focuses on Web Development, UX/UI Design, CRM consulting and SI, ERP consulting and SI, and more and has a small team.Read More
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Smart DrivingIndustries
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