Top 100 JavaScript Development Companies in the United Kingdom
The Best of October 2026Looking 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$10,000+2 - 9 employeesLondon, EnglandRead More
Web Epoch is a development house that was founded in 2014 and provides custom software, mobile app, and e-commerce development. The London-based team of under 10 employees mostly services mid- and enterprise-level clients, though they also support small businesses.
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KFC MSDUK AccentureIndustries
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302$100,000+50 - 249 employeesLondon, EnglandAI firm Infinity Technologies was launched in 2003. Their midsize team is in London, England and Chemnitz, Germany and specializes in Artificial Intelligence, Web Development, AI Agents, Generative AI, and more.Read More
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303$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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304$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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305Undisclosed2 - 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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306$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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307$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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308$5,000+50 - 249 employeesLytchett Matravers, EnglandBased in Dubai, United Arab Emirates and Lytchett Matravers, England, Convertt.co is a web design company and website development company. The agency focuses on Web Design and Web Development and is midsize.The agency was launched in 2023.Read More
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309$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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310$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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311$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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312$5,000+250 - 999 employeesLondon, EnglandRead More
Based in Des Plaines, Illinois; Chicago, Illinois; Milwaukee, Wisconsin and Franklin, Tennessee, Americaneagle.com is a web design company. They offer Web Design, Web Development, Digital Strategy, Search Engine Optimization, and more and were launched in 1981.
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313$1,000+2 - 9 employeesWythenshawe, EnglandHeadquartered in Wythenshawe, England, JW Digital is a web development company. Launched in 2023, the small team offers Web Development, E-Commerce Development, Mobile App Development, Search Engine Optimization, and more.Read More
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314$1,000+50 - 249 employeesLondon, EnglandFounded in 2019, Hygge Software is an AI company. Their midsize team is in Warszawa, Poland; Tallinn, Estonia; San Francisco, California and London, England. Their team focuses on Artificial Intelligence, Custom Software Development, Web Development, Mobile App Development, and more.Read More
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HeatedIndustries
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315$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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316$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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317$5,000+2 - 9 employeesLondon, EnglandFounded in 2009, Merkur Design is an user experience design agency. Their small team is in London, England and Istanbul, Türkiye. Their team specializes in UX/UI Design, Low/No Code Development, Web Design, Web Development, and more.Read More
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318$5,000+50 - 249 employeesManchester, EnglandBased in Manchester, England and Leeds, England, Trunk is a midsize mobile application development company. The team provides Mobile App Development and Web Development.Read More
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319$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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320$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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321$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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322$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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323$1,000+2 - 9 employeesLondon, EnglandICEWIND DALE CONSULTING is a web development company based in London, England. They offer Web Development, Custom Software Development, Web Design, IT strategy consulting, and more and were founded in 2024.Read More
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324$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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325$5,000+2 - 9 employeesSt Albans, EnglandWeb design company Katalysis Net was launched in 2000. The small team offers Web Design, Web Development, Content Marketing, and Search Engine Optimization. The firm is based in St Albans, England.Read More
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PSR Solicitors Hopp Tech European Public Real Estate Association SAB PowerIndustries
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326$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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327$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 -
328$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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329$5,000+10 - 49 employeesLondon, EnglandLaunched in 2025, Base X Tech is a custom software development firm. The firm focuses on Custom Software Development, UX/UI Design, E-Commerce Development, Web Design, and more and has a small team. The firm is headquartered in London, England; L'viv, Ukraine; Kraków, Poland and Kyiv, Ukraine.Read More
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330$10,000+50 - 249 employeesPotters Bar, EnglandAcademy Smart is a software development firm. Their midsize team is in Kharkiv, Ukraine; Potters Bar, England and Wrocław, Poland. The agency focuses on Custom Software Development, IT staff augmentation, Web Development, Mobile App Development, and more. The agency was established in 2009.Read More
Clients
Blue EQ Volidar 2LRN4 Cyber IncIndustries
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