Top 100 JavaScript Development Companies in London

Need Help Selecting a Company?
Directory image
Home
Web Developers
JavaScript
England
London

Top 100 JavaScript Development Companies in London

The Best of September 2026

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

  • 1

    (120 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.8

    Value

    4.7

    Would Recommend

    4.9
    $10,000+
    250 - 999 employees
    London, England
    GeekyAnts is an application development firm established in 2006. The firm provides Mobile App Development, Custom Software Development, Artificial Intelligence, Web Development, and more and has a midsize team.
    Read More

    Clients

    Siveco Romania Olive Garden Darden KhataBook

    Industries

    View Profile Visit Site

    • Get connected with a company for free

    Tell us about your project, and we'll match you with vetted companies that meet your requirements.

    Get Started
  • 2

    (62 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    4.9

    Would Recommend

    5.0
    $25,000+
    50 - 249 employees
    London, England
    Launched in 2012, unicrew is a custom software development firm. The midsize team offers Custom Software Development, Web Development, AI Agents, AI Consulting, and more. The agency is in London, England; Ormond Beach, Florida; Kraków, Poland and Tallinn, Estonia.
    Read More

    Clients

    Jack Cooper Transport Bigfood Group Booked It Open Room Inc.

    Industries

    View Profile Visit Site
  • 3

    (102 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.8

    Value

    4.7

    Would Recommend

    4.9
    $50,000+
    1,000 - 9,999 employees
    London, England
    Vention is an artificial intelligence firm. Founded in 2002, the company is based in New York, New York; London, England; Marietta, Georgia and San Francisco, California. The large team focuses on Artificial Intelligence, Custom Software Development, Enterprise App Modernization, cloud consulting & SI, and more.
    Read More

    Clients

    IBM PayPal pwc IC Markets

    Industries

    View Profile Visit Site
  • 4

    (28 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $10,000+
    50 - 249 employees
    London, England
    FocusReactive, a midsize web development firm, is located in Amsterdam, Netherlands; London, England; Warszawa, Poland and New York, New York. They provide Web Development, Custom Software Development, Web Design, and E-Commerce Development and were founded in 2019.
    Read More

    Clients

    EasyPark Arrive RealThread

    Industries

    View Profile Visit Site
  • 5

    (58 Reviews) 4.8

    Timeliness

    4.6

    Service Excellence

    4.8

    Value

    4.5

    Would Recommend

    4.9
    $50,000+
    250 - 999 employees
    London, England
    Infinum, 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

    Philips

    Industries

    View Profile Visit Site
  • 6

    (20 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $10,000+
    50 - 249 employees
    London, England
    Valor 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

    Breethe

    Industries

    View Profile Visit Site
  • 7

    (103 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $10,000+
    250 - 999 employees
    London, England
    Webskitters 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-AMG

    Industries

    View Profile Visit Site
  • 8

    (34 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $25,000+
    50 - 249 employees
    London, England

    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.

    Read More

    Clients

    Ply LCM Digital Fly Jets Thrive

    Industries

    View Profile Visit Site
  • 9

    (33 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    4.9

    Would Recommend

    5.0
    $25,000+
    50 - 249 employees
    London, England

    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

    Read More

    Clients

    Ocean Bottle

    Industries

    View Profile Visit Site
  • 10

    (9 Reviews) 4.3

    Timeliness

    4.2

    Service Excellence

    4.2

    Value

    4.5

    Would Recommend

    4.4
    $10,000+
    50 - 249 employees
    London, England
    Headquartered 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

    Discovery

    Industries

    View Profile Visit Site
  • 11

    (54 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $25,000+
    50 - 249 employees
    Rickmansworth, England
    Light IT Global, a web development firm, was launched in 2006. They are headquartered in Rickmansworth, England; Kyiv, Ukraine; Odesa, Ukraine and San Jose, California and have a midsize team. Their services include Web Development, IT staff augmentation, AI Agents, Custom Software Development, and more.
    Read More

    Clients

    Pfizer Philips Healthcare Synthesis Health ABB

    Industries

    View Profile Visit Site
  • 12

    (39 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.7

    Would Recommend

    5.0
    $10,000+
    50 - 249 employees
    London, England
    Thoughtbot, 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 360

    Industries

    View Profile Visit Site
  • 13

    (51 Reviews) 4.7

    Timeliness

    4.6

    Service Excellence

    4.7

    Value

    4.4

    Would Recommend

    4.9
    $25,000+
    250 - 999 employees
    London, England
    Established in 2000, Future Processing is a custom software development company. The midsize team provides Custom Software Development, cloud consulting & SI, AI Consulting, Artificial Intelligence, and more. The agency is based in Gliwice, Poland; Ternopil, Ukraine; London, England and Düsseldorf, Germany.
    Read More

    Clients

    Allocate

    Industries

    View Profile Visit Site
  • 14

    (22 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $10,000+
    50 - 249 employees
    London, England
    Founded 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 Care

    Industries

    View Profile Visit Site
  • 15

    (46 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    5.0
    $5,000+
    10 - 49 employees
    London, England

    Based in London, United Kingdom, Goodspeed is a website development firm. The small firm was founded in 2022. Their services include web development, custom software development, and mobile app development.

    Read More

    Industries

    View Profile Visit Site
  • 16

    (54 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $10,000+
    10 - 49 employees
    Bromley, England
    Custom software development firm Goodface agency was established in 2016. The firm offers Custom Software Development, UX/UI Design, Web Design, Web Development, and more and has a small team. The firm is based in Bromley, England; Kyiv, Ukraine; Tallinn, Estonia and New York, New York.
    Read More

    Clients

    Magnetiq Bank 365 Games Corefy KARL STORTZ

    Industries

    View Profile Visit Site
  • 17

    (83 Reviews) 4.8

    Timeliness

    4.7

    Service Excellence

    4.7

    Value

    4.6

    Would Recommend

    4.8
    $25,000+
    250 - 999 employees
    London, England
    TekRevol 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

    Industries

    View Profile Visit Site
  • 18

    (34 Reviews) 4.9

    Timeliness

    4.7

    Service Excellence

    4.9

    Value

    4.8

    Would Recommend

    4.9
    $50,000+
    10 - 49 employees
    London, England
    Together is a branding company launched in 2018. The small team specializes in Branding, UX/UI Design, Product Design, Web Development, and more. The agency is located in London, England; New York, New York and San Francisco, California.
    Read More

    Clients

    Unit

    Industries

    View Profile Visit Site
  • 19

    (19 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.8

    Value

    4.8

    Would Recommend

    4.9
    $10,000+
    250 - 999 employees
    London, England
    SENLA 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 Union

    Industries

    View Profile Visit Site
  • 20

    (97 Reviews) 5.0

    Timeliness

    4.9

    Service Excellence

    5.0

    Value

    4.9

    Would Recommend

    5.0
    $10,000+
    10 - 49 employees
    London, England
    Founded in 2016, Solar Digital is a website development company. The company specializes in Web Development, AI Agents, Custom Software Development, UX/UI Design, and more and has a small team. The company is headquartered in London, England and Odesa, Ukraine.
    Read More

    Clients

    Stark Shipping (analytical portal of marine industry

    Industries

    View Profile Visit Site
  • 21

    (31 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    5.0

    Value

    5.0

    Would Recommend

    5.0
    $25,000+
    50 - 249 employees
    London, England
    Midsize software development firm GoodCore Software, is headquartered in London, England; Karachi, Pakistan and Cyberjaya, Malaysia. Founded in 2005, the team specializes in Custom Software Development, Artificial Intelligence, Web Development, IT strategy consulting, and more.
    Read More

    Clients

    PMLL GCBF Hirevine London Women's Clinic

    Industries

    View Profile Visit Site
  • 22

    (36 Reviews) 4.7

    Timeliness

    4.6

    Service Excellence

    4.7

    Value

    4.6

    Would Recommend

    4.7
    $10,000+
    250 - 999 employees
    London, England
    Instinctools is a midsize software development company established in 2000. Their team provides Custom Software Development, Artificial Intelligence, BI & big data consulting & SI, Mobile App Development, and more. The company is headquartered in Stuttgart, Germany; Warszawa, Poland; Mississauga, Canada and Wilmington, Delaware.
    Read More

    Clients

    Daimler Fujitsu Nostrum SpexAI

    Industries

    View Profile Visit Site
  • 23

    (70 Reviews) 4.9

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $10,000+
    10 - 49 employees
    London, England
    CreativeWeb 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 Fund

    Industries

    View Profile Visit Site
  • 24

    (35 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.8

    Value

    4.6

    Would Recommend

    4.9
    $25,000+
    50 - 249 employees
    London, England
    Imaginary Cloud, a software development company, is located in London, England; Lisboa, Portugal; Coimbra, Portugal and San Francisco, California. The midsize team provides Custom Software Development, Artificial Intelligence, Mobile App Development, Web Development, and more and was founded in 2010.
    Read More

    Clients

    Nokia

    Industries

    View Profile Visit Site
  • 25

    (33 Reviews) 5.0

    Timeliness

    5.0

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    5.0
    $10,000+
    50 - 249 employees
    Kingston upon Thames, England

    Founded in 2019, Uinno is an artificial intelligence firm. The midsize team specializes in Artificial Intelligence, Custom Software Development, Low/No Code Development, UX/UI Design, and more. The company is based in L'viv, Ukraine; Tallinn, Estonia; Kingston upon Thames, England and Zaporizhzhia, Ukraine.

    Read More

    Clients

    OnlyFans

    Industries

    View Profile Visit Site
  • 26

    (26 Reviews) 4.9

    Timeliness

    4.9

    Service Excellence

    4.9

    Value

    4.9

    Would Recommend

    4.9
    $5,000+
    10 - 49 employees
    London, England
    Burst Digital is a web design company. Established in 2018, the company is located in London, England; New York, New York and San Francisco, California. The small team offers Web Design, Web Development, Search Engine Optimization, Branding, and more.
    Read More

    Clients

    Vivienne Westwood - The Vivienne Foundation Artisan AI Cogency Global Moonbeam Car Wash

    Industries

    View Profile Visit Site
  • 27

    (20 Reviews) 4.8

    Timeliness

    4.8

    Service Excellence

    4.8

    Value

    4.4

    Would Recommend

    4.9
    $50,000+
    10 - 49 employees
    London, England
    Custom software development firm Clock Limited was established in 1997. The agency offers Custom Software Development, Mobile App Development, UX/UI Design, and Web Development and has a small team. The agency is headquartered in Sarratt, England and London, England.
    Read More

    Clients

    Riot Games Mythical Society Hearst International Tennis Federation

    Industries

    View Profile Visit Site
  • 28

    (71 Reviews) 4.7

    Timeliness

    4.6

    Service Excellence

    4.7

    Value

    4.5

    Would Recommend

    4.7
    $25,000+
    50 - 249 employees
    London, England
    Software development company Magora was founded in 2010. In London, England; Sydney, Australia and Sunny Isles Beach, Florida, their midsize team provides Custom Software Development, Mobile App Development, Artificial Intelligence, Web Development, and more.
    Read More

    Clients

    Danone

    Industries

    View Profile Visit Site
  • 29

    (26 Reviews) 4.7

    Timeliness

    4.5

    Service Excellence

    4.7

    Value

    4.5

    Would Recommend

    4.8
    $25,000+
    250 - 999 employees
    London, England
    Robosoft Technologies Inc. Is a San Francisco, California-based app development company. They offer Mobile App Development, UX/UI Design, Web Development, Custom Software Development, and more and were launched in 1996.
    Read More

    Clients

    Warner Bros. Discovery HSBC McDonalds Mercury Finance

    Industries

    View Profile Visit Site
  • 30

    (14 Reviews) 5.0

    Timeliness

    4.8

    Service Excellence

    4.9

    Value

    4.8

    Would Recommend

    5.0
    $10,000+
    10 - 49 employees
    London, England
    Founded in 2018, Hiyield is a web design agency. Their small team is headquartered in London, England; Truro, England and Bristol, England. Their team offers Web Design, UX/UI Design, Custom Software Development, Web Development, and more.
    Read More

    Industries

    View Profile Visit Site
    • tracking image

Get connected with the right company for you

We'll do the work for you – finding and connecting you with service providers that meet your exact requirements.

Schedule Consultation

Most Reviewed JavaScript Developers in London

Check out a JavaScript Developers in London with the most new reviews in the past 12 months.

Most Reviewed

JavaScript Developers

London

More on methodology

Related content