Top 100 JavaScript Development Companies in London
The Best of August 2026Looking for a top JavaScript developer in London?
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 London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London JavaScript Developers
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511$1,000+2 - 9 employeesHemel Hempstead, EnglandEstablished in 2024, The Creative Box is a branding agency. Their services include Branding and Social Media Marketing.Read More
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512$25,000+10 - 49 employeesCrowborough, EnglandCustom software development company Elysium Ltd is headquartered in Crowborough, England. The company focuses on Custom Software Development, DevOps Managed Services, Enterprise App Modernization, Application Management & Support, and more and is small.The company was founded in 1991.Read More
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513$25,000+50 - 249 employeesReading, EnglandWorth Digital is a web design agency. They are in Reading, England and Rijswijk, Netherlands. Their team provides Web Design and UX/UI Design.Read More
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514$1,000+2 - 9 employeesBasildon, EnglandWeb design company Off The Peg Design Ltd was established in 2000. The company offers Web Design and Search Engine Optimization, and is small.Read More
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515$5,000+2 - 9 employeesWarfield, EnglandFounded in 2019, VersionMaybe. Is a small Warfield, England-based app development company. Their team provides Mobile App Development and Web Development.Read More
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516Undisclosed50 - 249 employeesWatford, EnglandTechno Facts Solutions Pvt Ltd is a software development firm based in Dublin, Ohio and Hyderabad, India. They focus on Custom Software Development and Staffing.Read More
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517UndisclosedFreelancer employeesCity of London, EnglandAmato Capital Limited is a custom software development firm based in City of London, England. They offer Custom Software Development and Web Development.Read More
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518UndisclosedFreelancer employeesLondon, EnglandTangerineSEO is a SEO services firm. Their small team of employees is located in London, England. Their team focuses on Search Engine Optimization and Content Marketing.Read More
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519$1,000+10 - 49 employeesHarlow, EnglandFNF Group is a web design company. They are located in Faisalabad, Pakistan and have a small team. The agency provides web design, product design, graphic design, logo, and more.Read More
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520Undisclosed2 - 9 employeesAylesford, EnglandWebsite development company webdeveloperslab is in Aylesford, England. The team focuses on Web Development and Other Digital Marketing.Read More
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521$5,000+10 - 49 employeesCrawley, EnglandAJ Nodes, a custom software development firm, was founded in 2016. The company focuses on Custom Software Development and Web Development.Read More
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522$10,000+Freelancer employeesGodalming, EnglandMassive Marketing is a web design company in Godalming, England. They specialize in Web Design, Web Development, Search Engine Optimization, Conversion Optimization, and more and were founded in 2024.Read More
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Mercer Labs NOAN Inspirational Adventures House Of ImpactIndustries
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523$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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524$5,000+2 - 9 employeesEast Grinstead, EnglandBumblebee IT Solutions Ltd, a custom software development firm, was established in 2019. The company offers Custom Software Development and Web Development.Read More
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525Undisclosed2 - 9 employeesAscot, EnglandElios Technology Limited is a custom software development firm. They were established in 2018, and their services include Custom Software Development and DevOps Managed Services.Read More
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526$50,000+10 - 49 employeesHoughton Regis, EnglandSmall web design company Al Jaami Technologies, is based in Houghton Regis, England. The team specializes in Web Design and UX/UI Design.Read More
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RepairCMS ULTIMATEIndustries
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527$50,000+10 - 49 employeesLong Crendon, EnglandSmall web development firm Growcreate, is headquartered in Long Crendon, England. They provide Web Development, Application Management & Support, UX/UI Design, and DevOps Managed Services and were established in 2012.Read More
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528UndisclosedFreelancer employeesGreat Warley, EnglandIn Great Warley, England, Online Business Solutions is a small social media marketing agency. Their services include Social Media Marketing and Content Marketing.Read More
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529$5,000+2 - 9 employeesChatham, EnglandBrave Little Tank is a web development firm based in Chatham, England. Their services include Web Development and Web Design.Read More
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530$1,000+2 - 9 employeesArdeley, EnglandBombinate Web Design is a web design company. They are in Milton Keynes, England and Ardeley, England, and their services include Web Design and Web Development.Read More
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531Undisclosed10 - 49 employeesRoyal Tunbridge Wells, EnglandCoding Sprint, a custom software development company, was launched in 2024. The firm provides Custom Software Development and IT strategy consulting, and is small.Read More
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532$25,000+10 - 49 employeesBasingstoke, EnglandHeadquartered in Basingstoke, United Kingdom and Lincoln, United Kingdom, Profound is a digital strategy and user experience design agency. The small company was established in 2005. Their services include digital strategy and ux/ui design.Read More
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533$10,000+2 - 9 employeesLacey Green, EnglandBrandon Cross is a software development firm. They are headquartered in Lacey Green, England, and their services include Custom Software Development and Web Development.Read More
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534$10,000+10 - 49 employeesReading, EnglandCode23 is a small software development company headquartered in Reading, England. The team specializes in Custom Software Development and E-Commerce Development.Read More
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535$5,000+2 - 9 employeesLuton, EnglandLaunch90 Ltd is a web design company launched in 2025. The small team specializes in Web Design and UX/UI Design.Read More
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536$10,000+2 - 9 employeesGuilden Morden, EnglandRead More
Crowers Limited, a custom software development company, is based in Guilden Morden, United Kingdom. The company specializes in custom software development, mobile app development, web development, web design, and more and has a small team.The company was founded in 2017.
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XylemIndustries
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537$1,000+2 - 9 employeesMortimer Common, EnglandRead More
I-Next Ltd. is a digital firm based in Reading, England With a team of fewer than 10, they lend their expertise in web development, IT managed services, and e-commerce development to clients ranging from small and midmarket businesses, from industries such as advertising and marketing, business services, and media.
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EdenredIndustries
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538$10,000+2 - 9 employeesAylesbury, EnglandEstablished in 2013, Framework Digital is a web design agency. Their team specializes in Web Design and Web Development.Read More
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539$10,000+10 - 49 employeesBrighton and Hove, EnglandDabApps is a small custom software development firm. Based in Brighton and Hove, England and Cardiff, Wales, the company was founded in 2010. Their services include Custom Software Development, Web Development, Mobile App Development, and UX/UI Design.Read More
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LODIndustries
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540$10,000+2 - 9 employeesCoggeshall, EnglandRead More
Small web development company We Create Digital, is headquartered in Coggeshall, England. They offer Web Development, E-Commerce Development, Web Design, Search Engine Optimization, and more and were established in 2011.
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