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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271$1,000+10 - 49 employeesLondon, EnglandAR/VR development company VisEngine Digital Solutions is in London, England and North Arlington, New Jersey. Founded in 2009, the team offers AR/VR development and Interior Design.Read More
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272$1,000+50 - 249 employeesLondon, EnglandEndevor IT Solutions Private Limited is a website development firm. They were established in 2017, and their services include Web Development and E-Commerce Development.Read More
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273Undisclosed250 - 999 employeesMünchen, GermanyCustom software development firm Star is located in Sunnyvale, California and San Francisco, California. Their services include Custom Software Development and Mobile App Development.Read More
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274$5,000+2 - 9 employeesLondon, EnglandInFact Digital Co-operative, a web design company, was launched in 2017. Headquartered in London, England, the team focuses on Web Design and Web Development.Read More
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275Undisclosed1,000 - 9,999 employeesLondon, EnglandEstablished in 1996, Critical Mass is a large web design company located in Calgary, Canada and London, England. Their team specializes in Web Design and UX/UI Design.Read More
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276$5,000+2 - 9 employeesLondon, England2Digit Innovations is a website development company headquartered in ghaziabad, India. The small team specializes in web development, mobile app development, search engine optimization, web design, and more and was founded in 2018.Read More
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277$1,000+250 - 999 employeesLondon, EnglandSynoviq is a social media marketing firm. They were launched in 2011, and their services include Social Media Marketing and Search Engine Optimization.Read More
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278$5,000+250 - 999 employeesFranklin, TNAmericaneagle.com is a web design company. Established in 1978, the team offers Web Design and Web Development. The agency is headquartered in Des Plaines, Illinois and Chicago, Illinois.Read More
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279$1,000+2 - 9 employeesLondon, EnglandIn London, England, Particular Agency is an user experience design agency. Established in 2022, the team focuses on UX/UI Design and Branding.Read More
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Rushmoor Knights AcademyIndustries
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280$50,000+10 - 49 employeesLondon, EnglandDusted, a branding company, is in London, England. They provide Branding and Web Development and were established in 2004.Read More
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281$10,000+50 - 249 employeesBarcelona, SpainHalo Lab is a midsize branding agency headquartered in Dubai, United Arab Emirates; New York, New York; 08, Andorra and Odesa, Ukraine. They offer Branding, Web Design, UX/UI Design, Graphic Design, and more and were established in 2013.Read More
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Auth0Industries
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282$10,000+2 - 9 employeesLondon, EnglandWeb design company WeAgile Limited is in London, England. The team offers Web Design and Web Development.Read More
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283Undisclosed2 - 9 employeesLondon, EnglandCommon Works, a branding agency, was launched in 2014. They offers Branding and Web Design.Read More
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First Mile Mayku HubbubIndustries
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284$5,000+10 - 49 employeesLondon, EnglandOmnius, a Content Marketing company, is based in London, England and Beograd, Serbia. Launched in 2020, the team offers Content Marketing and Search Engine Optimization.Read More
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285$1,000+2 - 9 employeesLondon, EnglandBitSmiths is a web development firm based in London, England. They offer Web Development and Mobile App Development and were founded in 2018.Read More
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286$10,000+10 - 49 employeesLondon, EnglandInventiff. Is a website development company founded in 2020. They are based in Cluj-Napoca, Romania and London, England and have a small team. The company specializes in Web Development, Mobile App Development, UX/UI Design, and Low/No Code Development.Read More
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287$1,000+10 - 49 employeesLondon, EnglandRead More
EastSons' Technologies is a software development firm. They are located in Noida, India; London, United Kingdom and Burnaby, Canada and have a small team that focuses on custom software development, branding, e-commerce development, mobile app development, and more. The firm was launched in 2014.
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288$10,000+10 - 49 employeesLondon, EnglandDiffusion Digital is a Marketing Strategy company. Established in 2014, the agency offers Marketing Strategy and E-Commerce Development.Read More
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289$10,000+10 - 49 employeesWarszawa, Poland24hour.dev, a web development firm, is in San Francisco, California and Warszawa, Poland. Founded in 2015, the team provides Web Development and Mobile App Development.Read More
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290$1,000+2 - 9 employeesLondon, EnglandBxoft is a web development firm. The London, England-based firm was launched in 2019. Their team specializes in Web Development and Web Design.Read More
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STCIndustries
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291$10,000+10 - 49 employeesLondon, EnglandWebdigi is a web development firm. They are located in London, England and have small team of experts. Their services include Web Development and UX/UI Design.Read More
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292$25,000+50 - 249 employeesLondon, EnglandRead More
Box UK is an enterprise software development company based in Cardiff, UK, with an office in London. The company, founded in 1998, has more than 50 employees who provide, among others, custom software development, web development, and enterprise app modernization services to various businesses.
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OKdo.comIndustries
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293$25,000+2 - 9 employeesLondon, EnglandDigital Strategy company Polar London was founded in 2013. In London, England and London, Vietnam, the team provides Digital Strategy and Other Digital Marketing.Read More
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Littlepay CFL Fearless Union QuidIndustries
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294$1,000+10 - 49 employeesLondon, EnglandEstablished in 2016, roar is a PPC company. Their services include Pay Per Click and Web Design.Read More
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295$25,000+10 - 49 employeesLondon, UK, EnglandSolusent is a CRM consulting and SI company founded in 2020. Their team specializes in CRM consulting and SI and Mobile App Development.Read More
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296$1,000+10 - 49 employeesLondon, EnglandLaunched in 2006, Design Direct UK, a small web development firm, is headquartered in London, England. Their services include Web Development and Mobile App Development.Read More
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297$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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298$1,000+10 - 49 employeesLondon, EnglandWebber 360º is a branding company in Budapest, Hungary and Wien, Austria. Their services include Branding and Market Research.Read More
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299$25,000+10 - 49 employeesLondon, EnglandUser experience design agency 100 Shapes focuses on UX/UI Design and Custom Software Development. They were founded in 2011.Read More
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300$1,000+10 - 49 employeesLondon, EnglandEstablished in 2020, Core Devs Ltd is a small Dubai, United Arab Emirates-based software development company. Their team provides Custom Software Development and Blockchain.Read More
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