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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1$10,000+250 - 999 employeesLondon, EnglandGeekyAnts is an application development firm established in 2006. The firm provides Mobile App Development, Custom Software Development, Artificial Intelligence, Web Development, and more and has a midsize team.Read More
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Siveco Romania Olive Garden Darden KhataBookIndustries
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2$50,000+1,000 - 9,999 employeesLondon, EnglandVention is an artificial intelligence firm. Founded in 2002, the company is based in New York, New York; London, England; Marietta, Georgia and San Francisco, California. The large team focuses on Artificial Intelligence, Custom Software Development, Enterprise App Modernization, cloud consulting & SI, and more.Read More
Clients
IBM PayPal pwc IC MarketsIndustries
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3$50,000+250 - 999 employeesLondon, EnglandInfinum, a custom software development company, was established in 2005. They are in New York, New York; San Francisco, California; Zagreb, Croatia and Ljubljana, Slovenia and have a midsize team. Their services include Custom Software Development, Web Development, Mobile App Development, UX/UI Design, and more.Read More
Clients
PhilipsIndustries
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4$10,000+50 - 249 employeesLondon, EnglandFocusReactive is an Amsterdam, Netherlands-based web development company. The midsize company was established in 2019. Their team provides Web Development, Custom Software Development, Web Design, and E-Commerce Development.Read More
Clients
EasyPark Arrive RealThreadIndustries
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5$50,000+50 - 249 employeesBristol, EnglandRead More
Torchbox is a web design agency launched in 2000. The firm focuses on web design, web development, ux/ui design, pay per click, and more and has a midsize team.
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6$10,000+10 - 49 employeesBromley, EnglandCustom software development firm Goodface agency was established in 2016. The firm offers Custom Software Development, UX/UI Design, Web Design, Web Development, and more and has a small team. The firm is based in Bromley, England; Kyiv, Ukraine; Tallinn, Estonia and New York, New York.Read More
Clients
Magnetiq Bank 365 Games Corefy KARL STORTZIndustries
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7$25,000+50 - 249 employeesLondon, EnglandRead More
Tech Alchemy is a software development studio based in London. Founded in 2016, they have around 150 employees who provide startups and small to medium-sized businesses with custom software development, blockchain development, and web & mobile app design and development. Services include prototyping, discovery, MVP development, and Web3 digital transformation
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Ocean BottleIndustries
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8$25,000+50 - 249 employeesLondon, EnglandRead More
DotCode is a design and development company based in Lviv, Ukraine, and founded in 2018. Their team of more than 10 provides web development, web design, and e-commerce development solutions for clients in the fields of hospitality, advertising, and financial services.
Clients
Ply LCM Digital Fly Jets ThriveIndustries
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9$5,000+50 - 249 employeesLondon, EnglandFounded in 2015, Digis, a Fiverr company (NYSE: FVRR) is a custom software development company. The midsize team specializes in Custom Software Development, Web Development, and IT staff augmentation. The firm is based in London, England; New York, New York; București, Romania and L'viv, Ukraine.Read More
Clients
Blablacar Hubspot PwC HumaIndustries
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10$10,000+50 - 249 employeesLondon, EnglandFounded in 2020, Old.St Labs is an AI company. The midsize team provides Artificial Intelligence, Custom Software Development, Web Development, and Mobile App Development. The firm is based in London, England.Read More
Clients
Mariana UFP The Military App Allegr East CareIndustries
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11$75,000+50 - 249 employeesLondon, EnglandRead More
Web development company 10up is headquartered in Sacramento, California; Boston, Massachusetts; New York, New York and London, United Kingdom. The agency provides web development, ux/ui design, web design, digital strategy, and more and is midsize.The agency was established in 2011.
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12$10,000+10 - 49 employeesWarrington, EnglandVisions Design is a branding agency based in Warrington, England and Fort Worth, Texas. The firm provides Branding, Web Design, Web Development, and Search Engine Optimization and has a small team.The firm was launched in 2010.Read More
Clients
cocreatd Unreasonable Black X System 7Industries
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13$50,000+50 - 249 employeesMatlock, EnglandWebsite development company Human Made was launched in 2010. The midsize New York, New York-based team focuses on Web Development.Read More
Clients
Sony Playstation Disney Standard Chartered HarvardIndustries
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14$5,000+10 - 49 employeesLondon, EnglandRead More
Based in London, United Kingdom, Goodspeed is a website development firm. The small firm was founded in 2022. Their services include web development, custom software development, and mobile app development.
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15$10,000+10 - 49 employeesLondon, EnglandCreativeWeb is a London, England-based web design company. The firm provides Web Design, Web Development, Search Engine Optimization, and E-Commerce Development and is small.The firm was founded in 2013.Read More
Clients
Gorilla Science The Tunnels - Gibraltar's WWII Experience Soapbox NATO Innovation FundIndustries
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16$25,000+250 - 999 employeesLondon, EnglandTekRevol is an application development firm launched in 2018. The firm offers Mobile App Development, IT staff augmentation, Custom Software Development, Web Development, and more and has a midsize team. The firm is based in Houston, Texas; Red Deer, Canada; Newark, California and New York, New York.Read More
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17$50,000+10 - 49 employeesLondon, EnglandTogether is a branding company launched in 2018. The small team specializes in Branding, UX/UI Design, Product Design, Web Development, and more. The agency is located in London, England; New York, New York and San Francisco, California.Read More
Clients
UnitIndustries
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18$25,000+50 - 249 employeesRickmansworth, EnglandLight IT Global is a web development company headquartered in Rickmansworth, England; Kyiv, Ukraine; Odesa, Ukraine and San Jose, California. The agency focuses on Web Development, Custom Software Development, IT staff augmentation, AI Agents, and more and has a midsize team.The agency was established in 2006.Read More
Clients
Pfizer Philips Healthcare Synthesis Health ABBIndustries
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19$25,000+50 - 249 employeesLondon, EnglandMidsize software development firm GoodCore Software, is headquartered in London, England; Karachi, Pakistan and Cyberjaya, Malaysia. Founded in 2005, the team specializes in Custom Software Development, Artificial Intelligence, Web Development, IT strategy consulting, and more.Read More
Clients
PMLL GCBF Hirevine London Women's ClinicIndustries
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20$25,000+50 - 249 employeesLondon, EnglandImaginary Cloud, a software development company, is located in London, England; Lisboa, Portugal; Coimbra, Portugal and San Francisco, California. The midsize team provides Custom Software Development, Artificial Intelligence, Mobile App Development, Web Development, and more and was founded in 2010.Read More
Clients
NokiaIndustries
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21$10,000+50 - 249 employeesLondon, EnglandRead More
Artificial intelligence company TechnoYuga was launched in 2020. Located in New Delhi, India; Surat, India; Toronto, Canada and Orland Park, Illinois, their midsize team focuses on Artificial Intelligence, Custom Software Development, Mobile App Development, and Web Development.
Clients
Gfacility Akasha Air mfine DecathlonIndustries
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22$5,000+10 - 49 employeesLondon, EnglandBurst Digital is a web design company. Established in 2018, the company is located in London, England; New York, New York and San Francisco, California. The small team offers Web Design, Web Development, Search Engine Optimization, Branding, and more.Read More
Clients
Vivienne Westwood - The Vivienne Foundation Artisan AI Cogency Global Moonbeam Car WashIndustries
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23$10,000+50 - 249 employeesLondon, EnglandIn London, United Kingdom, MOHARA is a business consulting company. The agency provides business consulting and is midsize.The agency was established in 2016.Read More
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24$10,000+10 - 49 employeesLondon, EnglandFounded in 2018, Hiyield is a web design agency. Their small team is headquartered in London, England; Truro, England and Bristol, England. Their team offers Web Design, UX/UI Design, Custom Software Development, Web Development, and more.Read More
Industries
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25$10,000+10 - 49 employeesLondon, EnglandAgile Digital Agency is a SEO agency located in London, England. Founded in 2018, the small team provides Search Engine Optimization, Web Design, and Web Development.Read More
Clients
Singleton Law Firm (USA)Industries
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26$10,000+50 - 249 employeesLondon, EnglandInfluential Software is a London, England-based software development firm. The midsize team focuses on Custom Software Development, Web Development, BI & big data consulting & SI, IT managed services, and more and was founded in 1993.Read More
Clients
DeloitteIndustries
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27$25,000+10 - 49 employeesBerkshire, EnglandLaunched in 2003, Rouge Media is a small web design agency located in Berkshire, England. Their services include Web Design, Web Development, and Branding.Read More
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28$5,000+10 - 49 employeesEdinburgh, ScotlandUX agency Lumi Studio was founded in 2020. They are in Edinburgh, Scotland and have a small team. Their services include UX/UI Design, Mobile App Development, Custom Software Development, IT strategy consulting, and more.Read More
Clients
OpenAI Anthemis YouMail JammJarIndustries
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29$10,000+50 - 249 employeesLondon, EnglandValor Software is a midsize website development firm headquartered in Lakewood, Colorado; Dover, Delaware; Praha, Czech Republic and London, England. Established in 2013, the team offers Web Development, IT staff augmentation, IT strategy consulting, Enterprise App Modernization, and more.Read More
Clients
BreetheIndustries
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30$10,000+2 - 9 employeesBath, EnglandRead More
Skyward Digital is a Bath, United Kingdom-based user experience design agency and website development company. They offer ux/ui design and web development and were founded in 2021.
Industries
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