Top 100 JavaScript Development Companies in the United Kingdom
The Best of November 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$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
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IBM PayPal pwc IC MarketsIndustries
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2$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
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Sony Playstation Disney Standard Chartered HarvardIndustries
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3$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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4$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
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Gorilla Science The Tunnels - Gibraltar's WWII Experience Soapbox NATO Innovation FundIndustries
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5$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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6$10,000+50 - 249 employeesLondon, EnglandWebsite development firm FocusReactive was launched in 2019. Located in Amsterdam, Netherlands; London, England; Warszawa, Poland and New York, New York, their midsize team provides Web Development, Custom Software Development, Web Design, and E-Commerce Development.Read More
Clients
EasyPark Arrive RealThreadIndustries
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7$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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8$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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9$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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10$10,000+250 - 999 employeesLondon, EnglandWebskitters is a mobile app development company. Their midsize team is based in Kolkata, India; London, England; Miami, Florida and Claymont, Delaware and focuses on Mobile App Development, Web Development, E-Commerce Development, IoT development, and more. The agency was founded in 2010.Read More
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Mercedes-AMGIndustries
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11$5,000+50 - 249 employeesLondon, EnglandUPQODE is a web design agency. The midsize Nashville, Tennessee-based team focuses on Web Design, UX/UI Design, and Web Development. The agency was founded in 2015.Read More
Clients
Gracenote - Entertainment ProvidersIndustries
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12$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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13$10,000+10 - 49 employeesLondon, EnglandRead More
Marzee Labs is a web development company that has been offering web design, web development, ad e-commerce development services to their clients since 2013. Their 10 employees are based out of their Porto, Barcelona, London, and Setúbal, Portugal offices.
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ARTEIndustries
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14$5,000+250 - 999 employeesLondon, EnglandKonstant Infosolutions is a Jaipur, India-based mobile application development firm. The midsize company was established in 2003. Their team focuses on Mobile App Development, Artificial Intelligence, and Web Development.Read More
Clients
United Nations - Global communication & socio-economic cooperation platform. Volkswagen - Corporate workforce & employee management app. Delmonte - Enterprise food distribution optimization platform. Thomasville - Government utility department managing public infrastructure.Industries
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15$25,000+50 - 249 employeesLondon, EnglandUnicrew, a custom software development company, was founded in 2012. Their midsize team is located in London, England; Ormond Beach, Florida; Kraków, Poland and Tallinn, Estonia and provides Custom Software Development, Web Development, Enterprise App Modernization, Artificial Intelligence, and more.Read More
Clients
Jack Cooper Transport Bigfood Group Booked It Open Room Inc.Industries
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16$25,000+250 - 999 employeesLondon, EnglandEstablished in 2000, Future Processing is a custom software development company. The midsize team provides Custom Software Development, cloud consulting & SI, AI Consulting, Artificial Intelligence, and more. The agency is based in Gliwice, Poland; Ternopil, Ukraine; London, England and Düsseldorf, Germany.Read More
Clients
AllocateIndustries
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17$50,000+50 - 249 employeesEdinburgh, ScotlandClockwise Software, a software development firm, was founded in 2014. Located in Edinburgh, Scotland, their midsize team specializes in Custom Software Development, Artificial Intelligence, Mobile App Development, Web Development, and more.Read More
Clients
Johnson & JohnsonIndustries
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18$10,000+50 - 249 employeesLondon, EnglandHeadquartered in London, England; Cape Town, South Africa; Bangkok, Thailand and Guadalajara, Mexico, MOHARA is a web development company. Launched in 2011, the midsize team focuses on Web Development, Mobile App Development, Product Design, and Application Testing.Read More
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19$10,000+1,000 - 9,999 employeesCoventry, EnglandSDLC Corp is an AI company. The large Dubai, United Arab Emirates-based agency was launched in 2015. Their team focuses on Artificial Intelligence, Custom Software Development, ERP consulting and SI, Web Development, and more.Read More
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20$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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21$5,000+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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22$10,000+10 - 49 employeesLondon, EnglandFounded in 2016, Solar Digital is a website development company. The company specializes in Web Development, AI Agents, Custom Software Development, UX/UI Design, and more and has a small team. The company is headquartered in London, England and Odesa, Ukraine.Read More
Clients
Stark Shipping (analytical portal of marine industryIndustries
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23$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.
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Ply LCM Digital Fly Jets ThriveIndustries
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24$75,000+250 - 999 employeesLincoln, EnglandCodal is a website development company. The midsize Chicago, Illinois-based team provides Web Development, UX/UI Design, and E-Commerce Development. The company was founded in 2009.Read More
Clients
Baxter Charles Schwab ExpressMed Cocktail CourierIndustries
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25$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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26$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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27$10,000+50 - 249 employeesLondon, EnglandThoughtbot, a web development firm, is located in New York, New York and London, England. They focus on Web Development, Mobile App Development, UX/UI Design, cloud consulting & SI, and more and were launched in 2003.Read More
Clients
Health Match 360Industries
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28$10,000+50 - 249 employeesLondon, EnglandHeadquartered in London, England; Randburg, South Africa; Cape Town, South Africa and Nairobi, Kenya, Scrums.com is a website development company. The midsize team offers Web Development, Mobile App Development, Custom Software Development, and cloud consulting & SI. The firm was established in 2012.Read More
Clients
DiscoveryIndustries
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29$5,000+50 - 249 employeesWinchester, EnglandLaunched in 2017, NERDZ LAB is an application development firm. In L'viv, Ukraine; Tallinn, Estonia and Winchester, England, their midsize team specializes in Mobile App Development, Web Development, Artificial Intelligence, and UX/UI Design.Read More
Clients
Reebok Fitness Patient Perfect Rosecut TriCanIndustries
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30$10,000+50 - 249 employeesLondon, EnglandCustom software development firm Brocoders was founded in 2014. The company provides Custom Software Development, Artificial Intelligence, cloud consulting & SI, Web Development, and more and has a midsize team.Read More
Clients
iFit - Interactive Fitness & Workout App HeyPractice, an AI-based Learning Platform MoolaX, Smart Cashflow Management Solution Every Pig, Online Logistics Platform for Swine Production IndustryIndustries
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