Top 100 JavaScript Development Companies in the United Kingdom
The Best of December 2025Looking 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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91$5,000+10 - 49 employeesWarrington, EnglandRead More
Atomic Digital Marketing / Atomic Digital Labs, a SEO company, is headquartered in Warrington, England; Southampton, England; Edinburgh, Scotland and Cardiff, Wales. Launched in 2018, the small team focuses on Search Engine Optimization, Pay Per Click, UX/UI Design, Web Development, and more.
Clients
RocambolesqueIndustries
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92$10,000+2 - 9 employeesLondon, EnglandWebpop Design is a web design company. Their small team is located in London, England. The firm focuses on Web Design, Web Development, and UX/UI Design.Read More
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DatameerIndustries
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93$25,000+250 - 999 employeesLondon , EnglandRead More
RNDpoint (former PST Labs) is a London-based development firm. The team of over 50 provides mobile app, custom software and web development services. Founded in 2014, they primarily serve enterprise businesses in the financial services industry.
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First Abu Dhabi Bank Basis Bank FICO TeraDataIndustries
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94$50,000+50 - 249 employeesLurgan, Northern IrelandGCD, a software development company, was launched in 1999. The midsize team offers Custom Software Development, Mobile App Development, Web Development, UX/UI Design, and more. The company is headquartered in Lurgan, Northern Ireland and Dublin 2, Ireland.Read More
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95$25,000+50 - 249 employeesCardiff, WalesRead 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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96$25,000+10 - 49 employeesLondon, EnglandHex Digital, an advertising company, is headquartered in London, United Kingdom. The small company was launched in 2008. Their services include advertising, custom software development, ux/ui design, branding, and more.Read More
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97$100,000+50 - 249 employeesEdinburgh, ScotlandRead More
xDesign is a design and development company in Edinburgh, U.K. Founded in 2010, their team of 50+ provides web development and mobile app development services to small business, midmarket, and enterprise clients across various industries.
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PayPalIndustries
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98$10,000+10 - 49 employeesEdinburgh, ScotlandGearedApp is a website development company. Launched in 2013, the team provides Web Development, Custom Software Development, Mobile App Development, and Artificial Intelligence. Their small firm is headquartered in Edinburgh, Scotland.Read More
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NHSIndustries
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99$25,000+10 - 49 employeesLondon, EnglandTotally.Tech is a custom software development company founded in 2000. The agency offers custom software development, enterprise app modernization, mobile app development, and application management & support and has a small team. The agency is headquartered in London, United Kingdom.Read More
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Start Up Loans (British Business Bank)Industries
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100$5,000+2 - 9 employeesBrighton, EnglandRead More
MAJOR is a small web development firm. Headquartered in Brighton, United Kingdom, the agency was founded in 2007. Their team focuses on web development, branding, web design, and custom software development.
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101$10,000+10 - 49 employeesCoventry , EnglandImobisoft is an artificial intelligence company. The small team is in Coventry , England and London, England. Their services include Artificial Intelligence, Custom Software Development, Generative AI, Web Development, and more.Read More
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NHS (Multiple divisions)Industries
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102$10,000+10 - 49 employeesLondon, EnglandRead More
Cloudflex, a custom software development firm, is in Kyiv, Ukraine. The small team specializes in custom software development, mobile app development, web development, Artificial Intelligence, and more. The firm was founded in 2018.
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YazaIndustries
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103$10,000+50 - 249 employeesExeter, EnglandFounded in 2017, EVOQINS is an app development company. The company offers Mobile App Development, Custom Software Development, and Web Development and has a midsize team. The company is in Bengaluru, India; Muscat, Oman and Exeter, England.Read More
Clients
Qatar FoundationIndustries
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104$5,000+50 - 249 employeesLondon, EnglandIConnect Digital Solutions Ltd is a London, England-based application development firm. They specialize in Mobile App Development, UX/UI Design, and Web Development and were launched in 2011.Read More
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105$25,000+10 - 49 employeesLondon, EnglandIn London, England and New York, New York, KOTA is a branding firm. The agency focuses on Branding, Web Design, Web Development, and AR/VR development and is small.The agency was established in 2013.Read More
Clients
Penguin Books & Jamie Oliver UPP DK&A WoganIndustries
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106$10,000+50 - 249 employeesLondon, EnglandRead More
Founded in 2010, PioGroup Software is a development company based in Kharkiv, Ukraine. They have a small team of fewer than 50 people, and they primarily work with small businesses.
Clients
Moving PipeIndustries
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107$25,000+2 - 9 employeesSalisbury, EnglandHeadquartered in Salisbury, England, Headscape is a small web design company. They specialize in Web Design, Web Development, UX/UI Design, Business Consulting, and more and were founded in 2002.Read More
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108$10,000+10 - 49 employeesLondon, EnglandEqual is a São Domingos de Rana, Portugal-based UX agency. The small team focuses on UX/UI Design, Product Design, Custom Software Development, Web Design, and more and was established in 2019.Read More
Clients
Management systems for Hospitality Management systems for Construction Management systems for Logistics Management systems for Energy & UtilityIndustries
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109$25,000+10 - 49 employeesLondon, EnglandRead More
Steadfast Collective is a custom software development company established in 2014. The small team focuses on custom software development, web development, and e-commerce development. The agency is located in London, United Kingdom.
Clients
National Caravan CouncilIndustries
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110$10,000+50 - 249 employeesLondon, EnglandThe Codest is a midsize IT staff augmentation company launched in 2009. Their team provides IT staff augmentation, Custom Software Development, Web Development, and DevOps Managed Services. The firm is in London, England; Cracow, England; Warszawa, Poland and Berlin, Germany.Read More
Clients
Mixfit Inc. (CH)Industries
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111$1,000+250 - 999 employeesDubai, United Arab EmiratesAppsNation, a mobile app development firm, is in Los Angeles, California; Los Angeles, California; Dubai, United Arab Emirates and Dallas, Texas. The midsize team provides Mobile App Development, AR/VR development, Low/No Code Development, Custom Software Development, and more and was founded in 2016.Read More
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112$5,000+250 - 999 employeesLondon, EnglandRead More
Coders Dev is a web design and mobile app development company based in London with offices in Singapore and Abu Dhabi, U.A.E. The company, founded in 2010, has more than 500 employees and provides web development and AI services. Coders Dev serves small and larger-sized companies in the health care & medical, hospitality & leisure, consumer products & services, financial services, gaming, telecommunications, automotive, manufacturing, and e-commerce industries.
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British TelecomIndustries
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113$25,000+10 - 49 employeesLondon, EnglandWe Are Kitty is a web design agency. Launched in 2017, the company is in London, England and Cape Town, South Africa. The small team provides Web Design, UX/UI Design, Web Development, E-Commerce Development, and more.Read More
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114$1,000+10 - 49 employeesFleet, EnglandRead More
Flow Guys, a website development company, was launched in 2022. The small Fleet, United Kingdom-based team focuses on web development.
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115Undisclosed10 - 49 employeesLondon, EnglandDigivate is a small artificial intelligence company launched in 1998. Their team specializes in Artificial Intelligence, AI Consulting, Web Development, Social Media Marketing, and more. The firm is located in London, England.Read More
Clients
WhistlIndustries
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116$25,000+50 - 249 employeesLondon, EnglandSoftware development company The Lightning Group was established in 2015. Their midsize team is in London, England. The Lightning Group focuses on Custom Software Development, Web Development, UX/UI Design, Mobile App Development, and more.Read More
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117$5,000+10 - 49 employeesLondon, EnglandRead More
In London, England and Birmingham, England, Pixated is a social media marketing firm. They specialize in Social Media Marketing, Pay Per Click, Branding, Email Marketing, and more and were established in 2018.
Clients
Tesco Heinz BooHoo Naked WolfeIndustries
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118$25,000+10 - 49 employeesLondon, EnglandRead More
Founded in 2014, SoBold is a design and development agency headquartered in London. Their team of 10 specialize in web development, web design, print design, and social media marketing services for clients. Their clients primarily work with with small and mid market companies in the education, health care, hospitality, energy, and consumer product industries.
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119$10,000+50 - 249 employeesLondon , EnglandRead More
Web development firm Wise Vision was founded in 2018. The agency provides web development, e-commerce development, accounting, enterprise app modernization, and more and has a small team. The agency is in L'viv, Ukraine.
Clients
Beep AutoIndustries
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120$5,000+10 - 49 employeesSintra, PortugalLAB325 is a web development company. The small Sintra, Portugal-based agency was established in 2016. Their team offers Web Development, Mobile App Development, Artificial Intelligence, Generative AI, and more.Read More
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