Top 100 JavaScript Development Companies in London
The Best of December 2025Looking 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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211$1,000+10 - 49 employeesLondon, EnglandRead More
Based in London, United Kingdom, Xtreme Web Tech is a branding agency. The agency offers branding, social media marketing, search engine optimization, web design, and more and is small.The agency was established in 2013.
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212Undisclosed10 - 49 employeesLondon, EnglandRead More
SmallGiants is a web development firm in London, United Kingdom. The small firm was founded in 2018. Their team provides web development, ux/ui design, application management & support, advertising, and more.
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213$1,000+2 - 9 employeesLondon, EnglandRead More
Cloudavity Consulting LTD is a consultancy founded in 2018. Their team of fewer than 10 provides cloud consulting and web development solutions from their office in London. They work with clients in industries such as business services, financial services, and IT solutions.
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KenoIndustries
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214$1,000+50 - 249 employeesLondon, EnglandRead More
Midsize IT managed services company Smart Working, is located in London, United Kingdom. Established in 2020, the team focuses on IT managed services, other IT consulting and SI, and IT staff augmentation.
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215$100,000+50 - 249 employeesLondon, EnglandRead More
TechPods is an IT firm based in Sofia, Bulgaria, and founded in 2018. With over 10 employees, they provide IT staff augmentation, custom software development, and web development services for small and medium-sized businesses alike.
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Arctic ShoresIndustries
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216$1,000+2 - 9 employeesFulham, EnglandRead More
Lisa Web Design is a web agency based in Küçükçekmece, Turkey with more than two employees. They have offered web design, custom software development, and web development solutions since their founding in 2013.
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Novarch E-CommerceIndustries
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217$1,000+10 - 49 employeesLondon, EnglandWebtech is a custom software development firm. They specialize in Custom Software Development, Web Development, UX/UI Design, ERP consulting and SI, and more and were founded in 2021. Their small team is in London, England.Read More
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218$1,000+10 - 49 employeesLondon, EnglandRead More
Zenibyte Creative Ltd is a small London, United Kingdom-based e-commerce development firm. The team specializes in e-commerce development, mobile app development, web development, web design, and more.
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219$10,000+2 - 9 employeesLondon, EnglandRead More
O'Dwyer Software is a London-based software company founded in 2014 with a team of more than two experts. They specialize in web development, custom software development, and application testing for clients ranging from small businesses to large firms.
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GFKIndustries
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220Undisclosed10 - 49 employeesLondon, EnglandRead More
Activate Media is a London-based digital design and development agency. Founded in 1992, the team of 15 specializes in web development and design, UX/UI design, digital strategy, and more. They work with midmarket businesses, small businesses, and enterprises.
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Agri-Pro Focus -
221$10,000+10 - 49 employeesLondon, EnglandOnekode, Software Development Company is an application development firm launched in 2023. The company focuses on Mobile App Development, Low/No Code Development, Web Development, Web Design, and more and has a small team. The company is located in Islamabad, Pakistan and London, England.Read More
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Ayjynt Vanalyzer Capstone Real Estate Trelix – A Heavy Machinery Rental PlatformIndustries
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222$10,000+50 - 249 employeesLondon, EnglandLaunched in 2020, Moonshot Partners is a IT strategy consulting company. The midsize team offers IT strategy consulting, custom software development, web development, mobile app development, and more. The agency is headquartered in London, United Kingdom.Read More
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223$5,000+2 - 9 employeesLondon, EnglandFounded in 2021, Nova Digital Agency is a advertising company. Their small team is in London, United Kingdom and London, United Kingdom and specializes in advertising, branding, conversion optimization, search engine optimization, and more.Read More
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224$1,000+10 - 49 employeesLondon, EnglandOlive IT is a digital strategy company based in London, England and Dhaka, Bangladesh. The small team specializes in digital strategy, search engine optimization, web development, e-commerce development, and more. The firm was established in 2022.Read More
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225$10,000+10 - 49 employeesLondon, EnglandRead More
Codepunch Ltd is a London, United Kingdom-based mobile application development firm. The small team specializes in mobile app development, web development, custom software development, web design, and more. The company was launched in 2022.
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226$5,000+2 - 9 employeesLondon, EnglandRead More
Pixable is a small CRM consulting and SI company. They provide CRM consulting and SI, custom software development, web development, mobile app development, and more and were founded in 2013. The agency is based in London, United Kingdom.
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227$10,000+10 - 49 employeesLondon , EnglandRead More
Danger Farms is a London-based digital agency founded in 2012. With their team of over 10 people, they provide custom software development, digital strategy, and UX/UI design solutions primarily to enterprise-level clients. They have experience in business and financial services, as well as retail.
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Lloyd's RegisterIndustries
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228Undisclosed10 - 49 employeesKingston Upon Thames, England7dots, an user experience design company, was launched in 2009. The small Kingston Upon Thames, United Kingdom-based team focuses on ux/ui design, e-commerce development, search engine optimization, web design, and more.Read More
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229$5,000+10 - 49 employeesLondon, EnglandRead More
Pixelpk Technologies is a custom software development company launched in 2018. The firm specializes in custom software development, mobile app development, social media marketing, search engine optimization, and more and has a small team.
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230$1,000+10 - 49 employeesLondon , EnglandRead More
Incisive Edge [solutions] Limited is a web design company. They are in London , United Kingdom and have a small team that focuses on web design, search engine optimization, content marketing, conversion optimization, and more. The agency was founded in 2009.
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231$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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232$10,000+10 - 49 employeesLondon, EnglandRead More
Launched in 2016, Furious Fox Limited is an app development company. Their small team is located in London, United Kingdom. Their team provides mobile app development, e-commerce development, Artificial Intelligence, custom software development, and more.
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233$10,000+2 - 9 employeesLondon, EnglandRead More
Under2 is a web agency based in London with more than two employees. They have provided web design, web development, and conversion optimization solutions since their founding in 2018. They work primarily with clients in the field of financial services.
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MambuIndustries
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234$1,000+50 - 249 employeesLondon,, EnglandESOLS is an other digital marketing company. The midsize Mirpur, Pakistan-based company was established in 2010. Their services include other digital marketing, pay per click, social media marketing, content marketing, and more.Read More
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235$1,000+10 - 49 employeesLondon, EnglandTenet - UI UX Design Agency | Experience Design, an UX company, was established in 2019. Based in دبي, United Arab Emirates; Noida, India and London, England, their small team offers UX/UI Design, Custom Software Development, Web Design, Web Development, and more.Read More
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Mercedes Gartner G42 Group BalsanIndustries
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236$10,000+10 - 49 employeesLondon, EnglandEstablished in 2014, KIJO is a web design agency. The company focuses on Web Design, Digital Strategy, UX/UI Design, Web Development, and more and has a small team. The company is headquartered in Birmingham, England and London, England.Read More
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237$25,000+10 - 49 employeesLondon, EnglandRead More
AK Full Auto is a software company based in London with more than 10 employees. They have offered web development, mobile app development, and web design solutions since their founding in 2018. They mainly work with small and mid-market firms.
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AppeaserIndustries
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238$25,000+250 - 999 employeesLondon, EnglandLaunched in 2003, Reprise Digital is a website development company. Their services include Web Development and UX/UI Design.Read More
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239$5,000+10 - 49 employeesLondon, EnglandRead More
Web Buds is a web design agency based in London. The agency, founded in 2016, has a team of less than ten that provides SEO, web design & development, digital strategy, UX/UI design, e-commerce development, social media marketing, and graphic design services to small companies.
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Byron BurgersIndustries
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240$10,000+2 - 9 employeesLondon, EnglandMinistry is a small web design agency founded in 1998. Their team offers Web Design and Web Development.Read More
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OxfamIndustries
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