Top 100 JavaScript Development Companies in London

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Top 100 JavaScript Development Companies in London

February 2023

Looking 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. 

Jump to Most Reviewed Companies

List of the Best London JavaScript Developers

  • 181
    • $1,000+
    • 250 - 999 employees
    • London, United Kingdom
    Xtroniq Technologies is an app development firm launched in 2011. The small Kolkata, India-based team specializes in mobile app development, web development, branding, direct marketing, and more.

    Industries

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  • 182
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    VisEngine Digital Solutions is an AR/VR development company. They are in London, United Kingdom and North Arlington, New Jersey and have a small team. Their services include AR/VR development, interior design, mobile app development, video production, and more. The company was launched in 2009.

    Industries

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  • 183
    • $25,000+
    • 50 - 249 employees
    • London, United Kingdom
    DevGrid is a software development firm founded in 2015. Their midsize team is headquartered in London, United Kingdom and Caxias do Sul, Brazil and focuses on custom software development, IoT development, mobile app development, IT staff augmentation, and more.

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  • 184
    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom
    Established in 2006, Webdigi is a web development company. The small team provides web development, ux/ui design, mobile app development, and social media marketing. The company is in London, United Kingdom.

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  • 185
    • $10,000+
    • 2 - 9 employees
    • London, United Kingdom
    WeAgile Limited is a web development company. The small London, United Kingdom-based company was founded in 2015. Their services include web development, web design, and mobile app development.

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  • 186
    • $10,000+
    • 2 - 9 employees
    • London, United Kingdom
    Based in London, United Kingdom, Pixelter is a web development company. Established in 2012, the small team focuses on web development and custom software development.

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  • 187
    • $10,000+
    • 10 - 49 employees
    • Westminster , United Kingdom

    Small digital strategy company Vitamin London, is based in Westminster , United Kingdom. Established in 2011, the team offers digital strategy, custom software development, branding, e-commerce development, and more.

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  • 188
    • $1,000+
    • 2 - 9 employees
    • London, United Kingdom
    BitSmiths, a web development company, is headquartered in London, United Kingdom. Established in 2018, the small team offers web development and mobile app development.
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  • 189
    • Scheduling

      4.9
    • Quality

      4.9
    • Cost

      4.8
    • NPS

      4.9
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    • $25,000+
    • 50 - 249 employees
    • London, United Kingdom

    NaNLABS is a digital agency based in La Plata, Argentina with another office in Neuquén. Established in 2013, the company consists of around 25 employees who specialize in custom software development, mobile app development, and UX/UI design.

    Clients

    • Symantec
    • Flight Club
    • Fifth Wall
    • Cyber Cube

    Industries

    Notable Project

    A product management and design consultancy business has hired NaNLABS for software development on an internal sales application. Key technologies include React, Java, Neo4j, Google Cloud, Docker, and MongoDB.

    “Trust them and take advantage of their process because it’s successful.”

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  • 190
    • Scheduling

      4.7
    • Quality

      4.8
    • Cost

      4.8
    • NPS

      5.0
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    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom

    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

    • ARTE
    • BEN Group
    • Impulso

    Industries

    Notable Project

    Marzee Labs designed and developed a the UX for a media platform. 

    "Marzee Labs uses a dedicated project manager who was exceptional."

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  • 191
    • Scheduling

      4.5
    • Quality

      4.9
    • Cost

      4.3
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 50 - 249 employees
    • London, United Kingdom

    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. 

    Clients

    • OKdo.com
    • Investec Asset Management
    • ateb
    • Welsh Government

    Industries

    Notable Project

    To revamp a gaming publisher’s website, Box UK audited the site to analyze its traffic, user needs, and functions. They then identified a new tech stack and rebuilt the site on WordPress.

    “They make sure that they’re delivering the best that they possibly can.”

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  • 192
    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom
    DBETA LIMITED is a website development company. Founded in 2019, the team specializes in web development, other digital marketing, and web design. Their small firm is London, United Kingdom-based.

    Clients

    • https://www.strongholdsecuritydoors.co.uk/
    • https://www.securitydoorsfactory.co.uk/

    Industries

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  • 193
    • $1,000+
    • 2 - 9 employees
    • London, United Kingdom

    Pixable is a small CRM consulting and SI company. They provide CRM consulting and SI, custom software development, web development, mobile app development, and more and were founded in 2013. The agency is based in London, United Kingdom.

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  • 194
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    EastSons' Technologies is a software development firm. They are located in Noida, India; London, United Kingdom and Burnaby, Canada and have a small team that focuses on custom software development, branding, e-commerce development, mobile app development, and more. The firm was launched in 2014.

    Industries

    Notable Project

    EastSons' Technologies developed a website for an online business. After a discovery phase, they used PHP for the website development.

    "Everyone liked the look and feel of the website. So, in total the experience was good."

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  • 195
    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom
    Diffusion Digital is an e-commerce development company. The small London, United Kingdom-based firm was launched in 2014. Their services include e-commerce development, marketing strategy, web design, web development, and more.
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  • 196
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom
    Roar Digital is a small pay per click agency. Launched in 2016, the team specializes in pay per click, web design, web development, search engine optimization, and more. The firm is in London, United Kingdom.

    Industries

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  • 197
    • Scheduling

      4.7
    • Quality

      4.7
    • Cost

      4.2
    • NPS

      4.7
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    • $25,000+
    • 2 - 9 employees
    • London, United Kingdom

    ARCH is a digital solutions firm specializing in the design, development, and hosting of websites, mobile apps, and business systems. They also have extensive experience in e-commerce, intranet, e-learning, CMS and CRM systems. Founded in 2005 and headquartered in London, with an office in Gateshead, U.K., their team consists fo fewer than 10 employees. 
     

    Clients

    • Nestle
    • So Vegan
    • NHS Engalnd
    • SKIN

    Industries

    Notable Project

    ARCH has developed a mobile app for a social and cultural experience platform. Following discovery meetings, they laid out the development process and produced the scope of work.

    "Everyone in the team were approachable and professional."

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  • 198
    • $25,000+
    • 10 - 49 employees
    • London, United Kingdom
    UX design agency 100 Shapes was established in 2011. Their small team is based in London, United Kingdom and provides ux/ui design, custom software development, digital strategy, and web development.

    Industries

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  • 199
    • $1,000+
    • 2 - 9 employees
    • London, United Kingdom

    KC Services, a web development firm, was launched in 2020. Their small team is in London, United Kingdom and focuses on web development, web design, and search engine optimization.

    Notable Project

    The Pixxel Agency developed and designed a brand new website for an HR services company. They provided three design templates for the client to choose from.

    "Not only were they quick, but they also did a fantastic job."

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  • 200
    • $1,000+
    • 10 - 49 employees
    • London, United Kingdom

    Founded in 2006, Design Direct UK is a software development firm. Their small team is based in London, United Kingdom. Their team offers custom software development, ux/ui design, mobile app development, web design, and more.

    Industries

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  • 201
    • $1,000+
    • 2 - 9 employees
    • London, United Kingdom
    StressFree Sites, an application development company, is located in London, United Kingdom. The small team provides mobile app development, web development, and custom software development. The firm was launched in 2011.
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  • 202
    • $1,000+
    • 10 - 49 employees
    • LONDON, United Kingdom
    SEOviser is a small SEO agency. Based in Dhaka, Bangladesh and LONDON, United Kingdom, the firm was launched in 2010. Their services include search engine optimization, web development, other digital marketing, and content marketing.

    Industries

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  • 203
    • $1,000+
    • 2 - 9 employees
    • London, United Kingdom
    MLC, a small graphic design company, is located in London, United Kingdom. Founded in 2017, the team focuses on graphic design, ux/ui design, video production, web design, and more.

    Industries

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  • 204
    • $5,000+
    • 50 - 249 employees
    • London, United Kingdom

    Software development company Zonalgo is in Karachi, Pakistan. The agency provides custom software development, web development, mobile app development, and e-commerce development and is midsize.The agency was launched in 2010.

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  • 205
    • $5,000+
    • 50 - 249 employees
    • London, United Kingdom
    Hallam is a digital strategy company. They are based in London, United Kingdom and Nottingham, United Kingdom and have a midsize team. Their services include digital strategy, web design, web development, conversion optimization, and more.

    Industries

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  • 206
    • $25,000+
    • 10 - 49 employees
    • London, United Kingdom

    Apexdv, a blockchain company, was founded in 2017. Their small team is located in Shelton, Connecticut and London, United Kingdom and focuses on blockchain, web design, and web development.

    Clients

    • Blockchain development

    Industries

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  • 207
    • $5,000+
    • 10 - 49 employees
    • London, United Kingdom
    QTech Networks, an application development company and web development firm, was founded in 1999. The agency provides mobile app development and web development and has a small team. The agency is located in Amman, Jordan and Dubai, United Arab Emirates.

    Industries

    Notable Project

    A civil society organization hired QTech Networks to develop a web and mobile app and provide video production services. The team created a platform with multiple features and video animation for promotion.

    "The team's quality of the work was excellent."

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  • 208
    • $25,000+
    • 2 - 9 employees
    • London, United Kingdom
    Pixie Labs is a London, United Kingdom-based custom software development firm. The small company was launched in 2013. Their services include custom software development, Artificial Intelligence, e-commerce development, ux/ui design, and more.

    Industries

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  • 209
    • $25,000+
    • 2 - 9 employees
    • London, United Kingdom
    Moodio is a small web development company launched in 2015. Their team specializes in web development, mobile app development, custom software development, and other application development. The firm is in London, United Kingdom.

    Industries

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  • 210
    • $10,000+
    • 10 - 49 employees
    • Dartford, United Kingdom
    Founded in 1997, mso web agency is a web design company and website development company. The small Dartford, United Kingdom-based team focuses on web design and web development.

    Industries

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