Top 100 JavaScript Development Companies in London
The Best of April 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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181$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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182$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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183$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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184$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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185$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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186$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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187$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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188$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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189$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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190$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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191$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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192$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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193$25,000+50 - 249 employeesLondon, EnglandRead More
Established in 2021, Zentix Soft is an UX design agency. The firm offers UX/UI Design, E-Commerce Development, Low/No Code Development, Web Design, and more and has a midsize team. The firm is headquartered in Jelgava, Latvia and London, England.
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194$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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195$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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196$1,000+2 - 9 employeesLondon, EnglandAzantic is a Warszawa, Poland-based e-commerce development company. The small team focuses on E-Commerce Development, Web Development, Web Design, Custom Software Development, and more and was launched in 2017.Read More
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Cambridge RealityIndustries
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197Undisclosed50 - 249 employeesLondon, EnglandCodelax Creative is a web development company. Launched in 2016, the midsize agency is based in London, England and Thane, India. Their team provides Web Development, Web Design, Graphic Design, E-Commerce Development, and more.Read More
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198$1,000+10 - 49 employeesLondon, EnglandRead More
UK LOGO DESIGNS LTD is a London, United Kingdom-based other digital marketing company. Established in 2010, the small team focuses on other digital marketing, web design, logo, and web development.
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199$10,000+50 - 249 employeesLondon, EnglandRead More
Founded in 2007, Astwellsoft is a software development firm that offers custom software development, mobile app development, and web development services to their clients. THeir 250 employees are based out of Lviv.
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200$10,000+10 - 49 employeesWestminster , EnglandMultivitamin Studio is a Digital Strategy company. The firm is based in Westminster , England and Truro, England. Their services include Digital Strategy and Custom Software Development.Read More
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The Racing ManagerIndustries
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201$50,000+50 - 249 employeesLondon, EnglandRead More
Founded in 2006, Vector Software Ltd is an IT outsourcing company based in L'viv, Ukraine. They have more than 50 employees that specialize in application testing and development. They mostly work with mid-market and small businesses.
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Stingray - Optical delousing solutions for fishing industry;Industries
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202$5,000+10 - 49 employeesLondon, EnglandFounded in 2019, Revatics Limited is a website development firm. Their small team is headquartered in London, England and Ahmedabad, India. Their team focuses on Web Development, Mobile App Development, Custom Software Development, E-Commerce Development, and more.Read More
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203$10,000+2 - 9 employeesLondon, EnglandRead More
The Beaverhead Ltd is a London-based development studio. Founded in 2014, their team of fewer than 10 specializes in custom software, mobile app, and web development services. They primarily serve small to midmarket businesses.
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Big Lazy PandaIndustries
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204$1,000+10 - 49 employeesLondon, EnglandWhite Label Solutions is a London, England-based software development company. Established in 2013, the small team specializes in Custom Software Development, Web Development, UX/UI Design, Mobile App Development, and more.Read More
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205$5,000+2 - 9 employeesLondon, EnglandLondon Web Design Agency is a web design agency. They specialize in Web Design, Marketing Strategy, Web Development, and Generative AI and were founded in 2004. The company is located in London, England.Read More
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206$1,000+2 - 9 employeesLondon, EnglandRead More
E-commerce development firm Hats ON Digital Agency is in Nicosia, Cyprus. Launched in 2018, the small team provides e-commerce development, social media marketing, web design, graphic design, and more.
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207$1,000+50 - 249 employeesLondon, EnglandRead More
dashdevs is a custom web and mobile app development firm based in Wilmington, Del. Founded in 2010, their team of 200 serves clients in the IT, business services, and financial services sectors. Services include Swift, JavaScript, and Java development.
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FitgridIndustries
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208$10,000+50 - 249 employeesTwickenham, EnglandIT strategy consulting company INVINCIX Solutions Private Limited was founded in 2017. Their midsize team is in Singapore, Singapore; Bhubaneswar, India; Ho Chi Minh City, Vietnam and Twickenham, United Kingdom and provides IT strategy consulting, ux/ui design, IT managed services, custom software development, and more.Read More
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XimpleIndustries
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209$1,000+2 - 9 employeesLondon, EnglandAgileSchemata, a SEO company, was founded in 2014. Their small team is headquartered in London, United Kingdom and provides search engine optimization, pay per click, ux/ui design, web development, and more.Read More
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210$1,000+10 - 49 employeesLondon, EnglandRead More
eDesk Solutions is a digital agency in Karachi, Pakistan. Founded in 2018, they have fewer than 5 employees that serve mostly small-business and midmarket clients in the e-commerce, advertising, and business sectors. Services include web development, graphic design, and mobile app development.
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Sam99p.co.ukIndustries
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