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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151$5,000+2 - 9 employeesLeeds, EnglandRead More
Erised, a web development firm, was launched in 2021. The small team focuses on web development, custom software development, mobile app development, and e-commerce development. The firm is based in Leeds, United Kingdom.
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152$25,000+10 - 49 employeesLondon, EnglandRead More
Theodo UK, founded in 2015, is a consultancy and digital development agency headquartered in London with an additional location in Paris. With a team of over 30 employees, they mainly provide mobile app development, web development, and custom software development services.
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AdmiralIndustries
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153$5,000+10 - 49 employeesLondon, EnglandRead More
NU Creative is a London, United Kingdom-based branding company. They offer branding, email marketing, advertising, graphic design, and more and were launched in 2004.
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154$50,000+2 - 9 employeesGateshead, EnglandRead More
Arch is an application development company. The small Gateshead, England-based firm was founded in 2005. Their services include Mobile App Development, Web Development, Web Design, UX/UI Design, and more.
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Nestle NHS England Dreamworks FindrIndustries
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155$25,000+10 - 49 employeesWatford, EnglandRead More
AppDrawn is a software solutions company founded in 1999. Their headquarters are in London and they have a second office in Barcelona. Across these 2 locations, they have a team of a dozen staff that do custom software development, web development, and mobile app development for small and medium-size businesses.
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AspireIndustries
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156$1,000+50 - 249 employeesLondon, EnglandLogicspice Consultancy Pvt Ltd., an application development firm, was founded in 2006. The midsize Jaipur, India-based team focuses on Mobile App Development, Web Development, Artificial Intelligence, Blockchain, and more.Read More
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157$10,000+10 - 49 employeesLondon, EnglandRead More
Founded in 2009, Trembit is a full-service software development company based in Kiev. The team of 35+ provides custom software development, e-commerce development, web development, and mobile app development for mainly small businesses.
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Red5Pro.comIndustries
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158$50,000+50 - 249 employeesLondon, EnglandSigli is a software development company. Their midsize team is in Antwerpen, Belgium; Vilnius, Lithuania; London, England and Amsterdam, Netherlands. The agency offers Custom Software Development, Artificial Intelligence, BI & big data consulting & SI, AI Consulting, and more. The agency was established in 2015.Read More
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Sensotec NVIndustries
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159$1,000+10 - 49 employeesLondon, EnglandRead More
Looming Tech, an app development company, is located in Sofia, Bulgaria and London, United Kingdom. The agency offers mobile app development, web development, custom software development, e-commerce development, and more and has a small team.The agency was founded in 2020.
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Lyst (http://lyst.co.uk/) Which (http://which.co.uk/) Imray Laurie Norie & Wilson (http://imray.com/) Hintsa (https://www.hintsa.com/)Industries
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160$5,000+10 - 49 employeesWangford, EnglandJetBase.IO, a cloud consulting & SI company, is based in Sheridan, Wyoming and Wangford, England. The small team provides cloud consulting & SI, IT staff augmentation, Custom Software Development, Web Development, and more. The firm was founded in 2014.Read More
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161$25,000+50 - 249 employeesLondon, EnglandWaracle, a software development firm, was established in 2004. Their midsize team is based in London, England; Dundee, Scotland; Edinburgh, Scotland and Glasgow, Scotland and provides Custom Software Development, Mobile App Development, Artificial Intelligence, Web Development, and more.Read More
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Virgin MoneyIndustries
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162$5,000+2 - 9 employeesColchester, EnglandRead More
Chick Digital, a website development firm, was established in 2015. The small team offers web development, BI & big data consulting & SI, custom software development, and Artificial Intelligence. The company is in Colchester, United Kingdom.
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Gay TimesIndustries
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163$1,000+10 - 49 employeesSwansea, WalesLaunched in 2010, The Constant Media is a web design agency. The small team specializes in Web Design, UX/UI Design, Web Development, and E-Commerce Development. The agency is based in Swansea, Wales.Read More
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William Grants & Sons Van Cleef & Arpels Glenfiddich Whisky Asahi -
164$5,000+10 - 49 employeesLondon, EnglandEstablished in 2013, Diversido is an app development company. Their small team is in Claymont, Delaware and London, England and focuses on Mobile App Development, Web Development, and IoT development.Read More
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eTutorCloudIndustries
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165$10,000+50 - 249 employeesSahibzada Ajit Singh Nagar, IndiaDebut Infotech is an AI company. They are based in Sahibzada Ajit Singh Nagar, India; Palatine, Illinois; Kitchener, Canada and Yarnton, England and have a midsize team that focuses on Artificial Intelligence, Mobile App Development, Blockchain, IT managed services, and more. The firm was founded in 2011.Read More
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EverledgerIndustries
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166$1,000+2 - 9 employeesNewcastle, Northern IrelandRead More
Fat Fish Marketing is a SEO services firm based in Banbridge, United Kingdom. The small team offers search engine optimization, web development, and pay per click and was launched in 2016.
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PlantXIndustries
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167$10,000+10 - 49 employeesLondon, EnglandSOTechnology is a small AI Agents company. Founded in 2007, the company is in London, England and Lafayette Hill, Pennsylvania. Their team provides AI Agents, Artificial Intelligence, Custom Software Development, Digital Strategy, and more.Read More
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bakerdaysIndustries
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168$100,000+10 - 49 employeesLondon, EnglandRead More
Future Platforms is a London based digital agency. Founded in 2000, Future Platforms employs a team of 39 specialists that provide e-commerce, mobile app, and wearable app development.
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Domino’s PizzaIndustries
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169$5,000+10 - 49 employeesLondon, EnglandEpigra is a website development company. They are based in London, England and Istanbul, Türkiye and have a small team that offers Web Development, Web Design, UX/UI Design, Custom Software Development, and more. The agency was established in 2009.Read More
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Gulf InsuranceIndustries
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170$25,000+10 - 49 employeesLondon, EnglandFounded in 2019, Drewl is a small UX design company. Their team specializes in UX/UI Design, Web Development, and Web Design. The firm is in London, England.Read More
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171$25,000+10,000+ employeesMumbai, IndiaRead More
Datamatics (formerly TechJini, Inc) is a mobile app development company based in Bangalore, India with an additional office in Princeton, N.J. The company was founded in 2005 and has grown since then to a team of about 300. They provide mobile app and web development, UX/UI design, and IT strategy consulting.
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HoneywellIndustries
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172$100,000+50 - 249 employeesEdinburgh, ScotlandRead More
ClearSky Logic, a custom software development firm, was founded in 2018. The firm offers custom software development, BI & big data consulting & SI, cybersecurity, and IT staff augmentation and has a small team.
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173$10,000+10 - 49 employeesLondon, EnglandApplication development firm Redbee Software was founded in 2018. Their small team is located in Cluj-Napoca, Romania; New York, New York and London, England and specializes in Mobile App Development, Web Development, and UX/UI Design.Read More
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174$10,000+50 - 249 employeesPotters Bar, EnglandAcademy Smart is an IT staff augmentation company located in Kharkiv, Ukraine and Potters Bar, England. The midsize team specializes in IT staff augmentation, Custom Software Development, Web Development, Mobile App Development, and more. The firm was founded in 2009.Read More
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CloudynIndustries
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175Undisclosed250 - 999 employeesLondon, EnglandApp development firm Holycode was launched in 2014. Located in Beograd, Serbia; Novi Sad, Serbia; Niš, Serbia and Binningen, Switzerland, their midsize team provides Mobile App Development, Application Management & Support, ERP consulting and SI, Custom Software Development, and more.Read More
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176$25,000+10 - 49 employeesManchester, EnglandRead More
VTS Software is software development company located in Manchester, U.K. Since 2007, their small team of around 5 has been specializing in custom software, web, and mobile app development for small and mid-sized businesses alike. They have experience in a variety of industries such as advertising, healthcare, manufacturing, and business services.
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Whispering SmithIndustries
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177$1,000+10 - 49 employeesHednesford, EnglandRead More
Brave Bear Marketing Ltd is a web design firm based in Hednesford, United Kingdom. Founded in 2019, their team of 30 serves clients in the advertising, and consumer services sectors. Services include web development and social media marketing.
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BASFIndustries
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178$10,000+10 - 49 employeesLondon, EnglandRead More
ICustomWeb is a website development firm founded in 2018. The company offers web development, web design, and ux/ui design and has a small team. The company is located in Bournemouth, United Kingdom.
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179Undisclosed10 - 49 employeesStoke Prior, EnglandRead More
SEO services firm Sherbet Donkey Media was launched in 2019. The small Stoke Prior, United Kingdom-based team provides search engine optimization, pay per click, web design, graphic design, and more.
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Kingfisher Care ServicesIndustries
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180$25,000+10 - 49 employeesBirmingham, EnglandEconify is a cloud consulting & SI company. Established in 2001, the agency is in New York, New York and Birmingham, England. The small team focuses on cloud consulting & SI, Web Development, Mobile App Development, E-Commerce Development, and more.Read More
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