Top 100 JavaScript Development Companies in London
The Best of December 2025Looking for a top JavaScript developer in London?
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 London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London JavaScript Developers
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61$5,000+50 - 249 employeesLondon, EnglandRead More
Default-Value Software Developers is an e-commerce development company. They specialize in e-commerce development, custom software development, and web development and were founded in 2010. Their small team is Chercassy, Ukraine-based.
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Quad NovaIndustries
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62$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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63$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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64$1,000+10 - 49 employeesLondon, EnglandAR/VR development company Takeaway Reality was launched in 2020. The small London, England-based team specializes in AR/VR development, Custom Software Development, Business Consulting, Web Development, and more.Read More
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Microsoft FordIndustries
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65$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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66$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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67$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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68$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
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Penguin Books & Jamie Oliver UPP DK&A WoganIndustries
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69$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
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Mixfit Inc. (CH)Industries
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70$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
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Management systems for Hospitality Management systems for Construction Management systems for Logistics Management systems for Energy & UtilityIndustries
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71$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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72$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.
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National Caravan CouncilIndustries
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73$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.
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Moving PipeIndustries
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74$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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75$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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76Undisclosed10 - 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
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WhistlIndustries
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77$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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78$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.
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Tesco Heinz BooHoo Naked WolfeIndustries
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79$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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80$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.
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Beep AutoIndustries
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81$5,000+10 - 49 employeesLondon, EnglandRead More
Mifort is a web development firm. Founded in 2015, the team focuses on web development and mobile app development. Their small company is Tallinn, Estonia-based.
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82$5,000+50 - 249 employeesLondon, EnglandRead More
Web development firm Rafiki was established in 2023. The company provides web development, product design, IT managed services, and Artificial Intelligence and has a midsize team. The company is based in London, United Kingdom.
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83$10,000+10 - 49 employeesLondon, EnglandRead More
Located in London, England and Madrid, Spain, Catch is a small Digital Strategy company. They focus on Digital Strategy, UX/UI Design, Web Development, Web Design, and more and were founded in 2007.
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SharpIndustries
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84$50,000+50 - 249 employeesLondon, EnglandThinslices Development, a website development company, is located in Iași, Romania and London, England. The midsize firm was established in 2010. Their team focuses on Web Development, Mobile App Development, and UX/UI Design.Read More
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85$10,000+10 - 49 employeesLondon, EnglandHarrison Carloss, a website development firm, was launched in 1972. Their small team is based in Stoke-On-Trent, England; Manchester, England and London, England and specializes in Web Development, Branding, Marketing Strategy, Web Design, and more.Read More
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West Midlands Safari Park YMCA UCFB Northwood Estate AgentsIndustries
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86$10,000+10 - 49 employeesLondon, EnglandRead More
5StarDesigners is a design agency founded in London in 2013 with more than 10 members. They are experts in UX/UI design, mobile app development, and custom software development solutions for small and medium-sized companies.
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SwikeIndustries
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87$10,000+50 - 249 employeesLondon, EnglandRead More
Kernelics is a software development company founded in 2020 with over 50 employees. They provide web development, mobile app development, and AI solutions from their office in Minsk, Belarus. They work with small businesses across various industries.
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88$10,000+50 - 249 employeesLondon, EnglandAngry Nerds is a custom software development firm launched in 2015. The agency provides Custom Software Development, UX/UI Design, Web Development, and Mobile App Development and has a midsize team.Read More
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89$5,000+10 - 49 employeesLondon, EnglandRead More
RCCO - Creative Sales & Marketing, an user experience design agency, is located in London, United Kingdom. Launched in 2018, the small team specializes in ux/ui design, branding, digital strategy, and web design.
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90$50,000+50 - 249 employeesLondon, EnglandIntellectsoft is a software development company founded in 2007. The agency provides Custom Software Development, Mobile App Development, IT staff augmentation, Web Development, and more and has a midsize team. The agency is based in Miami, Florida; London, England; Oslo, Norway and Kyiv, Ukraine.Read More
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MitsubishiIndustries
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