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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121$5,000+50 - 249 employeesLondon, EnglandRead More
Web development firm Rafiki was established in 2023. The company provides web development, product design, IT managed services, and Artificial Intelligence and has a midsize team. The company is based in London, United Kingdom.
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122$50,000+50 - 249 employeesLondon, EnglandLaunched in 2007, Intellectsoft is a software development firm. The company specializes in Custom Software Development, Artificial Intelligence, Mobile App Development, IT staff augmentation, and more and has a midsize team.Read More
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123$10,000+10 - 49 employeesLondon, EnglandRead More
Located in London, England and Madrid, Spain, Catch is a small Digital Strategy company. They focus on Digital Strategy, UX/UI Design, Web Development, Web Design, and more and were founded in 2007.
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SharpIndustries
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124$5,000+10 - 49 employeesReading, EnglandLAB325 is a web development company. The small Sintra, Portugal-based agency was established in 2016. Their team offers Web Development, Mobile App Development, Artificial Intelligence, Generative AI, and more.Read More
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125$10,000+10 - 49 employeesStoke-On-Trent, EnglandHarrison Carloss, a website development firm, was launched in 1972. Their small team is based in Stoke-On-Trent, England; Manchester, England and London, England and specializes in Web Development, Branding, Marketing Strategy, Web Design, and more.Read More
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West Midlands Safari Park YMCA UCFB Northwood Estate AgentsIndustries
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126$5,000+10 - 49 employeesLondon, EnglandRead More
Mifort is a web development firm. Founded in 2015, the team focuses on web development and mobile app development. Their small company is Tallinn, Estonia-based.
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127$25,000+10 - 49 employeesAlcester, EnglandRead More
Founded in 2003, cab engine is a small digital strategy company. Their services include digital strategy, e-commerce development, social media marketing, conversion optimization, and more. The agency is headquartered in Alcester, United Kingdom.
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128$25,000+10 - 49 employeesLondon, EnglandRead More
Yalla is an UX design company. They are in London, United Kingdom and Gaza City, Palestine, State of and have a small team that specializes in ux/ui design, custom software development, web design, web development, and more. The agency was launched in 2019.
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Shannon TrustIndustries
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129$50,000+50 - 249 employeesHertford, EnglandRead More
Zoocha is a web development firm founded in 2009 and headquartered in Hertford, in the U.K. The firm has other locations in Valencia, Spain; Balneário Camboriú, Brazil; and New York, N.Y. Zoocha has about 30 employees.
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Westminster City CouncilIndustries
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130$25,000+10 - 49 employeesLondon, EnglandIn London, England and New York, New York, KOTA is a branding firm. The agency focuses on Branding, Web Design, Web Development, and AR/VR development and is small.The agency was established in 2013.Read More
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Penguin Books & Jamie Oliver UPP DK&A WoganIndustries
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131$50,000+10 - 49 employeesLondon, EnglandBlank Space is an user experience company. The small Mississauga, Canada-based agency was founded in 2014. Their team offers UX/UI Design, Mobile App Development, Low/No Code Development, Custom Software Development, and more.Read More
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Dunkin'Industries
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132$50,000+10 - 49 employeesManchester , EnglandRead More
Founded in 2010, Silverchip is located in Manchester, United Kingdom. Their team of 13 employees provides mobile app development and custom software development services for enterprise, midmarket, and small businesses.
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Suits Me BankingIndustries
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133$5,000+10 - 49 employeesLondon, EnglandRead More
In London, England and Birmingham, England, Pixated is a social media marketing firm. They specialize in Social Media Marketing, Pay Per Click, Branding, Email Marketing, and more and were established in 2018.
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Tesco Heinz BooHoo Naked WolfeIndustries
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134$10,000+10 - 49 employeesLondon, EnglandRead More
5StarDesigners is a design agency founded in London in 2013 with more than 10 members. They are experts in UX/UI design, mobile app development, and custom software development solutions for small and medium-sized companies.
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SwikeIndustries
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135$50,000+50 - 249 employeesLondon, EnglandThinslices Development, a website development company, is located in Iași, Romania and London, England. The midsize firm was established in 2010. Their team focuses on Web Development, Mobile App Development, and UX/UI Design.Read More
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136$10,000+50 - 249 employeesLondon, EnglandRead More
Kernelics is a software development company founded in 2020 with over 50 employees. They provide web development, mobile app development, and AI solutions from their office in Minsk, Belarus. They work with small businesses across various industries.
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137Undisclosed10 - 49 employeesLondon, EnglandRead More
Tilde Loop is a small software development firm launched in 2019. Their team specializes in custom software development, web development, and other application development. The firm is headquartered in London, United Kingdom.
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The LowdownIndustries
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138$1,000+2 - 9 employeesLondon, EnglandDCP Web Designers is a web design agency. They are in London, England and London, England and have a small team. The agency focuses on Web Design, Web Development, E-Commerce Development, and Search Engine Optimization.Read More
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Showtime Fireworks EH Capital Pro Fire Safe Make My House WarmerIndustries
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139$25,000+10 - 49 employeesLondon , EnglandRead More
AVAMAE is a software solutions agency run by a team of fewer than 50 professionals founded in 2011. Based in London, the company offers custom software, web, and mobile app development services for small and medium-sized businesses from various industries, such as business services, financial services, and health care.
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BetDSIIndustries
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140$10,000+2 - 9 employeesLondon, EnglandRead More
Founded in 2017, Lambert Labs is a software development agency that specializes in Python. Their team of fewer than 10 employees is based in London. They also provide web development services and application testing.
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AccentureIndustries
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141$10,000+10 - 49 employeesLondon, EnglandIT Dev Staff is a software development firm. They focus on Custom Software Development, Web Development, Mobile App Development, E-Commerce Development, and more and were launched in 2016. The agency is headquartered in London, England.Read More
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142$10,000+50 - 249 employeesLondon, EnglandLaunched in 2015, Angry Nerds is a custom software development firm. The firm specializes in Custom Software Development, UX/UI Design, Web Development, and Mobile App Development and has a midsize team. The firm is in Wrocław, Poland; London, England; Atlanta, Georgia and Toronto, Canada.Read More
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143$25,000+10 - 49 employeesNewcastle upon Tyne, EnglandRead More
Readysalted Design Ltd, a web design agency, was founded in 2003. They are headquartered in Newcastle upon Tyne, United Kingdom and have a small team. Their services include web design, web development, mobile app development, print design, and more.
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SageIndustries
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144$25,000+10 - 49 employeesCardiff, WalesIllustrate Digital, a web development company, is in Cardiff, Wales; Bristol, England and London, England. The small firm was founded in 2013. Their team specializes in Web Development, UX/UI Design, and Web Design.Read More
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Penguin Random HouseIndustries
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145$10,000+50 - 249 employeesManchester, EnglandZAPTA Technologies is a custom software development firm. Their midsize team is based in Austin, Texas; Lahore, Pakistan; Manchester, England and Yanbu Al Bahr, Saudi Arabia. Their services include Custom Software Development, Web Development, Mobile App Development, Artificial Intelligence, and more. The agency was founded in 2020.Read More
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146$5,000+10 - 49 employeesLondon, EnglandButtercups is a custom software development company and web development firm. The Kyiv, Ukraine-based firm was established in 2019. The small team offers custom software development and web development.Read More
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MobiWalletIndustries
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147$25,000+10 - 49 employeesLondon, EnglandRead More
Umber.Tech — Fintech & Highload Experts is a Microservices Architecture Services company. Their small team is located in Tallinn, Estonia; Dubai, United Arab Emirates; Hannover, Germany and Boston, Massachusetts and offers Microservices Architecture Services, Web Development, Mobile App Development, UX/UI Design, and more. The agency was founded in 2017.
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Benzinga OLX AmeriaIndustries
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148$5,000+2 - 9 employeesLeeds, EnglandRead More
Erised, a web development firm, was launched in 2021. The small team focuses on web development, custom software development, mobile app development, and e-commerce development. The firm is based in Leeds, United Kingdom.
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149$25,000+10 - 49 employeesLondon, EnglandIn London, England, Contic is an application development firm. They provide Mobile App Development, Web Development, Artificial Intelligence, UX/UI Design, and more and were founded in 2021.Read More
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150$25,000+10 - 49 employeesLondon, EnglandRead More
Theodo UK, founded in 2015, is a consultancy and digital development agency headquartered in London with an additional location in Paris. With a team of over 30 employees, they mainly provide mobile app development, web development, and custom software development services.
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AdmiralIndustries
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