Top 100 JavaScript Development Companies in the United Kingdom
The Best of June 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+50 - 249 employeesLondon, EnglandEstablished in 2012, unicrew is a midsize custom software development firm. Their team focuses on Custom Software Development, Web Development, and Mobile App Development. The agency is based in Kraków, Poland; Ormond Beach, Florida; London, England and Tallinn, Estonia.Read More
Clients
Jack Cooper Transport Bigfood Group Booked It Open Room Inc.Industries
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2$10,000+250 - 999 employeesLondon, EnglandLocated in San Francisco, California; Bengaluru, India and London, England, GeekyAnts is a mobile application development firm. They focus on Mobile App Development, Custom Software Development, Web Development, Artificial Intelligence, and more and were established in 2006.Read More
Clients
Siveco Romania Olive Garden Darden KhataBookIndustries
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3$10,000+10 - 49 employeesLondon, EnglandEstablished in 2019, FocusReactive is a small website development firm based in Amsterdam, Netherlands; London, England; Warszawa, Poland and New York, New York. Their services include Web Development, Custom Software Development, E-Commerce Development, and Web Design.Read More
Clients
EasyPark Arrive RealThreadIndustries
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4$50,000+1,000 - 9,999 employeesLondon, EnglandVention is an IT staff augmentation company. Their large team is in New York, New York; London, England; Marietta, Georgia and San Francisco, California. The company focuses on IT staff augmentation, Custom Software Development, Web Development, Mobile App Development, and more. The company was launched in 2002.Read More
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IBM PayPal pwc IC MarketsIndustries
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5$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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6$25,000+50 - 249 employeesRickmansworth, EnglandLight IT Global is a web development firm. Their midsize team is based in Rickmansworth, England; Kyiv, Ukraine; Odesa, Ukraine and San Jose, California and provides Web Development, Custom Software Development, Mobile App Development, Artificial Intelligence, and more. The firm was founded in 2006.Read More
Clients
Pfizer Philips Healthcare Synthesis Health ABBIndustries
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7$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.
Clients
ARTEIndustries
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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$25,000+50 - 249 employeesLondon, EnglandRead More
Imaginary Cloud is a Web, Mobile and AI Software Development and UX/UI Design Company with offices in the UK, US and Portugal. In the last 11 years they have helped build and scale more than 300 applications, from Start-ups, Scale-ups to Enterprises, winning several global awards. They offer a comprehensive skill set of developers, data scientists and designers coupled with a streamlined agile process.
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NokiaIndustries
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10$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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11$5,000+250 - 999 employeesLondon, EnglandFounded in 2003, Konstant Infosolutions is a mobile app development company. They are in Jaipur, India; New York, New York; London, England and Dubai, United Arab Emirates and have a midsize team. Their services include Mobile App Development, Artificial Intelligence, UX/UI Design, and Web Development.Read More
Clients
United Nations - Global intergovernmental organization fostering peace and human rights. Our Work: Developed an International Affairs Platform to enhance global communication and socio-economic cooperation. Volkswagen - Leading German luxury automotive group, including Audi, Porsche, and Skoda. Our Work: Engineered an advanced corporate employee management system app to streamline workforce operations. Stanley Connect - Pioneer French IoT ecosystem partnered with Microsoft Azure and Cybeel. Our Work: Built an intelligent employee management app integrated with cutting-edge connected technology. Delmonte - A major US-market food manufacturer generating $1.8B in annual sales. Our Work: Developed a robust enterprise web platform to optimize branded processed food distribution.Industries
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12$10,000+50 - 249 employeesLondon, EnglandValor Software is a Lakewood, Colorado-based web design company. The midsize company was established in 2013. Their services include Web Design, UX/UI Design, IT strategy consulting, IT staff augmentation, and more.Read More
Clients
BreetheIndustries
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13$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
Clients
Mercedes-AMGIndustries
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14$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
Clients
Ocean BottleIndustries
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15$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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16$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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17$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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18$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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19$25,000+10 - 49 employeesBromley, EnglandGoodface agency is an user experience design agency founded in 2016. The company specializes in UX/UI Design, Custom Software Development, Web Development, Web Design, and more and has a small team.Read More
Clients
Magnetiq Bank 365 Games Corefy KARL STORTZIndustries
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20$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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21$25,000+250 - 999 employeesLondon, EnglandLaunched in 2000, Future Processing is a software development company. In Gliwice, Poland; Ternopil, Ukraine; London, England and Düsseldorf, Germany, their midsize team specializes in Custom Software Development, cloud consulting & SI, BI & big data consulting & SI, Web Development, and more.Read More
Clients
AllocateIndustries
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22$10,000+10 - 49 employeesLymm , EnglandVisions Design, a branding company, is in Lymm , England and Fort Worth, Texas. Launched in 2010, the small team offers Branding, Web Design, Web Development, and Search Engine Optimization.Read More
Clients
cocreatd Unreasonable Black X System 7Industries
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23$5,000+50 - 249 employeesStamford, EnglandRead More
Offshorly, a custom software development firm, was launched in 2014. Their midsize team is based in Stamford, England and Quezon City, Philippines and provides Custom Software Development, Artificial Intelligence, Web Design, Web Development, and more.
Clients
7-11 (Philippines) Dribble Portfolio: https://dribbble.com/offshorlyIndustries
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24$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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25$10,000+250 - 999 employeesLondon, EnglandSENLA is a midsize software development company. Located in Warszawa, Poland; London, England and Zagreb, Croatia, the agency was established in 2012. Their team focuses on Custom Software Development, Web Development, Mobile App Development, Blockchain, and more.Read More
Clients
Abbott BOSCH KPMG Western UnionIndustries
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26$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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27$1,000+2 - 9 employeesLondon, EnglandSmall SEO company Agile Digital Agency, is headquartered in London, England. They provide Search Engine Optimization, Web Design, and Web Development and were launched in 2018.Read More
Clients
Singleton Law Firm (USA)Industries
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28$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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29$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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30$10,000+250 - 999 employeesLondon, EnglandFounded in 2000, Instinctools is a midsize big data analytics company based in Stuttgart, Germany; Warszawa, Poland; Mississauga, Canada and Wilmington, Delaware. Their services include BI & big data consulting & SI, IT staff augmentation, Custom Software Development, Web Development, and more.Read More
Clients
Daimler Fujitsu Nostrum SpexAIIndustries
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Check out a JavaScript Developers in United Kingdom with the most new reviews in the past 12 months.
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