Top 100 JavaScript Development Companies in the United Kingdom

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Top 100 JavaScript Development Companies in the United Kingdom

January 2023

Looking 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. 

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List of the Best United Kingdom JavaScript Developers

  • 1
    • Scheduling

      4.7
    • Quality

      4.8
    • Cost

      4.7
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $50,000+
    • 250 - 999 employees
    • London, United Kingdom

    One Beyond is a bespoke software development and digital transformation company headquartered in London with additional engineering centers in Madrid (Spain), Budapest & Szeged (Hungary) and Bucharest (Romania). Across international locations, they have a team of more than 350 individuals providing custom software, web and mobile application development and large- scale digital transformation to a diverse clientele.They support large established businesses, nonprofits, government organizations, and VC-funded startups

    Clients

    • Smith & Nephew
    • GAIL's Bakery
    • Costa Express
    • Pearson

    Industries

    Notable Project

    One Beyond (formerly DCSL GuideSmiths) developed a cloud-based web app for a contract company. The digital tool lets users define large construction projects and streamlines the procurement process for contractors.

    “Whenever there was a problem, they helped us come up with a solution.”

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  • 2
    • Scheduling

      4.7
    • Quality

      4.9
    • Cost

      4.8
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 10 - 49 employees
    • London, United Kingdom

    Founded in 2018, Together is a creative agency. Their team of around 10 employees is based in London. They focus on web development and design and branding.

    Clients

    • Mosaic
    • SeedLegals
    • Amazon
    • Coast

    Industries

    Notable Project

    A financial services company hired Together to provide web development. Their efforts have also included branding tasks, like marketing strategy, color schemes, and copywriting.

    "I genuinely think they're the only design brand I'd recommend."

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  • 3
    • $25,000+
    • 50 - 249 employees
    • Croydon, United Kingdom

    Founded in 2005 and headquartered in Croydon, UK, GoodCore Software specializes in bespoke software development. WIth a team of about 50 employees, the company offers web and mobile app development to startups and established businesses alike. Engagement options include fixed- cost and dedicated development teams.

    Clients

    • Printed Music Licensing
    • Weight Loss Resources
    • GC Business Finance
    • XTracked Deliveries

    Industries

    Notable Project

    GoodCore developed a SaaS application for managing briefing programs and events for Fortune 100 companies. The team coded in React and Laravel for creating a web-based application. The application helped automate and streamline the management of corporate events, briefing programs and meetings.

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  • 4
    • Scheduling

      4.5
    • Quality

      4.7
    • Cost

      4.4
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $100,000+
    • 50 - 249 employees
    • Newcastle upon Tyne, United Kingdom

    Founded in 2007, hedgehog lab is a global software consultancy of 200+ that specializes in multi-platform software and device innovation. Headquartered in London with six offices across three continents, their team architects, designs, and develops app solutions that prepare brands for the future of post-PC devices.

    Clients

    • Aviva
    • AJ Bell
    • LaserShip
    • Santander

    Industries

    Notable Project

    hedgehog lab works on app development for Android and iOS for an InsurTech company. They’ve built a software development kit for the client’s mobile technology using JavaScript, Kotlin, Swift, and Objective-C.

    “hedgehog lab invests time and effort into our products and creates greater opportunities for us to explore together.”

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  • 5
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      4.9
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 50 - 249 employees
    • London, United Kingdom

    Tech Alchemy was founded in 2016 and has two locations in London. Their team of nearly ten employees provides web development, mobile app development, and UX/UI design services for small businesses.

    Clients

    • Ocean Bottle
    • TOAD
    • MyBricks
    • Moviecoin

    Industries

    Notable Project

    Tech Alchemy provided fullscale design and development support to create a platform. They built the screens and UI, and compiled relevant data to form the final product.

    "Their adaptability and ability to respond to technical challenges were impressive."

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  • 6
    • Scheduling

      4.8
    • Quality

      4.9
    • Cost

      4.7
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom

    Hiyield is a small website development firm located in St. Austell, United Kingdom. Launched in 2018, the team focuses on web development, custom software development, ux/ui design, application management & support, and more.

    Industries

    Notable Project

    A marketing agency partnered with hiyield to develop a site that would better represent their brand. The team was in charge of creating mood boards and wireframes, fixing bugs, and conducting final reviews.

    "They're freaking awesome. They do great work and are a pleasure to work with."

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  • 7
    • $10,000+
    • 10 - 49 employees
    • Farnham, United Kingdom

    Valiant Design is a strategic creative agency located in Farnham, England. They have about 13 teammates. Since 2010, they have provided branding, web design, and packaging design services to primarily midmarket agencies in the health care and medical, business services, and manufacturing industries.

    Clients

    • Contec Inc
    • WFS Global
    • Alrec
    • Sony

    Industries

    Notable Project

    Starting from scratch, Valiant Design redesigned the WordPress website of a protection material manufacturer. The team took the client’s goals and visual requirements to deliver an SEO-sensitive platform.

    “They’re very good at turning your ideas into reality.”

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  • 8
    • $25,000+
    • 10 - 49 employees
    • Manchester, United Kingdom

    Based in Manchester, UK, Corporation Pop has been around for over a decade and is now an established part of the mobile and web development industry. The small team delivers powerful results to clients across several industries.

    Clients

    • NHS
    • The Cream Group
    • Live Nation
    • BBC

    Industries

    Notable Project

    Corporation Pop was employed to deliver four HTML5 web tools that are used to create games and challenges for education purposes. 

    "They've gone the extra mile in obtaining resolutions to our problems, and have been very honest."

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  • 9
    • Scheduling

      4.4
    • Quality

      4.7
    • Cost

      4.3
    • NPS

      4.7
    Read Full Reviews on Clutch Visit Site
    • $50,000+
    • 10 - 49 employees
    • London, United Kingdom

    NEVERBLAND is a web development firm. They provide web development, web design, ux/ui design, custom software development, and more and were launched in 2010. Their small team is London, United Kingdom-based.

    Clients

    • Togetherall
    • Lick
    • MyTrees
    • Bulb

    Industries

    Notable Project

    NEVERBLAND has helped a cocktail business completely redesign their Shopify website. They’ve incorporated new features, applied optimizations, and made the site’s backend more user-friendly.

    "They’re very good at meeting our deadlines."

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  • 10
    • $10,000+
    • 50 - 249 employees
    • London, United Kingdom

    Influential Software is a software development firm in London, United Kingdom; Maidstone, United Kingdom and Glasgow, United Kingdom. The firm focuses on custom software development, web development, BI & big data consulting & SI, IT managed services, and more and has a midsize team.The firm was launched in 1993.

    Clients

    • Deloitte
    • American Express
    • London Stock Exchange
    • Pret a Manger

    Industries

    Notable Project

    Influential Software developed a Sharepoint solution to improve a children's charity organization's data management and delivered an interactive wiki. 

    "We were very impressed with Influential for the positive meetings and collaboration between our two companies."

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  • 11
    • $10,000+
    • 50 - 249 employees
    • London, United Kingdom

    Founded in 2010, Magora is a 50+ team of web and mobile app designers and developers based in London. Whether it’s B2B or B2C, the firm creates bespoke software that integrates with existing business solutions to enable user-centered interaction and scalable software architecture.

    Clients

    • Danone
    • Unilever
    • Toyota
    • Royal College of Art

    Industries

    Notable Project

    Magora Systems has helped with DevOps and worked on the main core system for a mobility solutions company. They’ve also built systems from scratch using PHP, JavaScript, and relational databases hosted on AWS.

    “They’re a stable and reliable team.”

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  • 12
    • Scheduling

      4.8
    • Quality

      4.8
    • Cost

      4.8
    • NPS

      4.8
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 50 - 249 employees
    • London, United Kingdom

    Powercode is a web development agency based in Kyiv, Ukraine founded in 2015. They are operated by a team of 66 who are experts in web, mobile app, and custom software development for clients ranging from startups to enterprises. They have experience working in industries such as financial services, business services, and IT. They are also familiar with working with platforms like Amazon, Linux servers, and Azure, among others.

    Industries

    Notable Project

    A digital marketing agency hired Powercode to update the UX/UI designs of their website and improve visual elements. They ensured that the UX/UI designs would be suitable for smartphones and tablets

    "The Powercode experts are highly qualified, and they have vast experience and creativity."

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  • 13
    • $5,000+
    • 2 - 9 employees
    • London, United Kingdom

    Burst Digital is a web design company in London, United Kingdom. They offer web design, graphic design, web development, digital strategy, and more and were launched in 2018.

    Clients

    • Vivienne Westwood - The Vivienne Foundation
    • Lucinda Green
    • Clean Kitchen
    • Verity Bowditch

    Industries

    Notable Project

    Burst Digital was hired by a nonprofit organization to design and develop a WordPress website. They're also tasked with designing a logo, typography, color scheme, brand book, and social media templates.

    “We’re most impressed with Burst Digital’s flexibility and willingness to go the extra mile to cater to our needs."

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  • 14
    • $5,000+
    • 10 - 49 employees
    • Lymm , United Kingdom

    Visions Design Lymm is a design studio based in Lymm, UK. Their team of over 10 was founded in 2010 and serves small and midmarket businesses. Services include web and graphic design as well as branding.

    Clients

    • Horizon Care & Education
    • Scout Financial Services
    • Rockwash
    • GAC

    Industries

    Notable Project

    Visions Design was hired by a refrigeration and air conditioning company to build their website. They presented ideas to the client, designed the platform, and developed the outdated website.

    "We found them easy to work with, professional, and creative."

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  • 15
    • $25,000+
    • 10 - 49 employees
    • london, United Kingdom

    Thought&Function is a digital agency founded in London in 2017 with no more than 10 members. They are experts in web development, mobile app development, and UX/UI design solutions for clients in the industries of financial services, education, and health care.

    Clients

    • DoctorLink
    • AllPlants
    • ProperCorn
    • Kano

    Industries

    Notable Project

    Thought&Function supported various stages of growth for a fintech company. They built websites, incorporated SMS and open banking features into an app, and helped evaluate CTO candidates.

    “The work they do is instrumental to our process, and they really help us with our exploration.”

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  • 16
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom

    Old.St Labs is a software development business based in London. The business, founded in 2020, has a team of more than ten that provides custom software development, mobile app development, UX/UI design, web design & development, and AI services. Old.St Labs serves small and mid-market companies in the advertising & marketing, education, financial services, health care & medical, and legal industries.

    Clients

    • Kopona
    • Brain.Health
    • CityMunch
    • Altus Investment Management Ltd

    Industries

    Notable Project

    Old.St Labs provided mobile app prototyping for a community-building platform. They were tasked with visualizing the client's concept from a design standpoint. They developed the prototype using InVision.

    "They were just highly focused on delivering the results rather than the process."

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  • 17
    • Scheduling

      4.8
    • Quality

      5.0
    • Cost

      4.8
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 10 - 49 employees
    • Edinburgh, United Kingdom

    GearedApp is a software development firm based in Edinburgh, Scotland. They were founded in 2013 and have a team of 11 employees who specialize in mobile development, web development, and UX/UI design. They work mostly with small business clients in the healthcare, business services, and education industries.

    Clients

    • NHS
    • Edinburgh University
    • AWDis
    • Raven Controls

    Industries

    Notable Project

    GearedApp built a website that details the objectives and activities of a biotechnology company. The team worked with a branding and design agency on the site. They used provided wireframes for the project.

    "I was impressed with GearedApp’s attentiveness and responsiveness."

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  • 18
    • $50,000+
    • 50 - 249 employees
    • York, United Kingdom

    Netsells is an app development agency based in York, UK. The agency was founded in 2009 and now employs a team of about 30. Netsells specializes in mobile app development, but also provides web development and UX/UI design services. Most of Netsell's clients are small to midmarket businesses.

    Clients

    • Hiscox
    • Uber
    • Trainline
    • Warburtons

    Industries

    Notable Project

    Netsells designed and developed the client’s website and integrated their existing booking management system. The agency also provides SEO marketing services.

    "With Netsells, you get a lot of added value you get beyond what you pay for.. Netsells is very collaborative."

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  • 19
    • $1,000+
    • 10 - 49 employees
    • Warrington, United Kingdom

    Atomic Digital Marketing is a digital marketing agency headquartered in Stretton Warrington, United Kingdom. Founded in 2016, their team of 4 provides SEO, web design, PPC management, and social media marketing. Their specialties are WordPress development and Facebook advertising. 

    Clients

    • Rocambolesque
    • Enbi Global Inc
    • Savants UK
    • The Student Lawyer

    Industries

    Notable Project

    Atomic Digital Marketing developed and designed a website for a dog walking and dog sitting company. The team optimized the site for SEO and provided social media management services.

    "Their affordability and lead time set them apart."

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  • 20
    • Scheduling

      4.5
    • Quality

      4.9
    • Cost

      4.2
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 50 - 249 employees
    • Cardiff, 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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  • 21
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 2 - 9 employees
    • Newcastle upon Tyne, United Kingdom

    Blueocto Ltd is a web agency founded in Newcastle upon Tyne, England in 2013 with fewer than 10 members. They are experts in web design, web development, and e-commerce development solutions for small businesses.

    Clients

    • Ginger Leadership Communications
    • Darlington College
    • Proquip Golf
    • Claire Giles Cards

    Notable Project

    Blueocto Ltd is helping a further education college update their existing website, make it user-friendly, and gradually add new features, like their new online enrollment system. They also provide web support.

    "The communication between the teams is excellent, and it feels like they are an extension of our in-house team."

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  • 22
    • Scheduling

      4.8
    • Quality

      4.9
    • Cost

      4.8
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 250 - 999 employees
    • London , United Kingdom

    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.

    Clients

    • First Abu Dhabi Bank
    • Eurasian Bank
    • Breaking Equity
    • Loop

    Industries

    Notable Project

    RNDpoint handles outsourced IT services for a software development company. In efforts to scale up the client's internal team, they provide development efforts on a wide range of projects.

    “They consistently provide quality resources that can accomplish any level of complexity that the project requires.”

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  • 23
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      4.8
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 10 - 49 employees
    • Dundee, United Kingdom

    Zudu is a digital agency founded in 2014. Based in Dundee, U.K., they have two other offices in Edinburgh, U.K. and London. The team of 9 specializes in web development and mobile app development. The firm usually services midmarket and enterprise clientele. 

    Clients

    • NHS
    • Scottish Government
    • SSSC
    • Trading Standards

    Industries

    Notable Project

    Zudu developed a bespoke e-commerce website for a skincare consultancy. The team handled the coding and page development for the website. Around 5–6 teammates worked directly with the client on the project.

    "ZUDU went above and beyond the scope of work."

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  • 24
    • $25,000+
    • 10 - 49 employees
    • Sarratt, United Kingdom

    Clock Limited is a digital design and build company. Founded in 1997, the company is headquartered in Kings Langley, United Kingdom. They have a team of around 35 employees who focus on custom software, web, and mobile app development.

    Clients

    • International Tennis Federation
    • Leicester Tigers
    • Northampton Saints
    • Wall Street Journal

    Industries

    Notable Project

    Clock Limited provided frontend design and development to enhance two companies’ websites. Along with infrastructure hosting and database management, they trained content teams to use the CMS.

    “Once I established a relationship with their helpful team, I hired them again without hesitation.”

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  • 25
    • Scheduling

      4.6
    • Quality

      4.6
    • Cost

      4.4
    • NPS

      4.8
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 10 - 49 employees
    • London, United Kingdom

    Bit Zesty is a custom software development firm. They provide custom software development, ux/ui design, web development, application management & support, and more and were launched in 2009. Their small team is London, United Kingdom-based.

    Clients

    • Oxford Medical Simulation
    • Trussell Trust (UK Foodbanks)
    • Queen's Awards for Enterprise
    • HMRC

    Industries

    Notable Project

    Bit Zesty was tasked with website maintenance and support for a human rights charity. They used Trello to manage the development process. They also completed a feature development sprint.

    "They didn't hesitate to challenge our thinking, deconstruct ideas, and propose solutions we may have overlooked."

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  • 26
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $100,000+
    • 50 - 249 employees
    • Edinburgh, United Kingdom

    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. 

    Clients

    • PayPal
    • Heineken
    • World Health Organization
    • William Grant & Sons

    Industries

    Notable Project

    xDesign developed a mobile app for a modular building manufacturer. The team built and designed the platform from wireframes through a prototype to the final product.

    "Everyone was very knowledgeable and skilled which put us at ease right away."

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  • 27
    • Scheduling

      4.6
    • Quality

      4.7
    • Cost

      4.6
    • NPS

      4.7
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 10 - 49 employees
    • Cambridge, United Kingdom

    Custom software development firm Studio 24 is located in Cambridge, United Kingdom. The small company was founded in 1999. Their team focuses on custom software development, digital strategy, marketing strategy, web design, and more.

    Industries

    Notable Project

    Studio 24 has developed a website that incorporated an interactive route map for a truck infrastructure development company. They've also maintained and updated the platform as needed through WordPress CMS.

    "Their regular contact on and offline occurs, and continuity has been excellent."

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  • 28
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      4.8
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $5,000+
    • 2 - 9 employees
    • Brighton, United Kingdom

    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.

    Industries

    Notable Project

    MAJOR built a website for a trade union. They initially conducted user research before designing and developing the site.

    "I found working with MAJOR very easy, and their responsiveness was at an utmost professional level."

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  • 29
    • $10,000+
    • 10 - 49 employees
    • London, United Kingdom

    Asper Brothers is a product design & development firm based in London, United Kindom, and offices in Warsaw, Poland. It was founded in 2007 and has more than 35 employees that specialize in providing web development, custom software development, and e-commerce development services to a wide range of clients, mainly focusing on business services, IT, real estate, marketing & advertising, automotive, education, non- profit, e-commerce, and other industries. 

    Clients

    • CaseMGR
    • XREF
    • Vaping360
    • Pallo

    Industries

    Notable Project

    ASPER’s team developed a website that provides information on the knowledge and work of real estate agents, where customers can find insights before starting a collaboration.​

    "ASPER is a professional group, and they've been able to give us good feedback and ideas."

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  • 30
    • Scheduling

      4.9
    • Quality

      4.9
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 2 - 9 employees
    • London, United Kingdom

    Pixated is a marketing agency in London, England. Founded in 2018, they have about 2 employees that serve small-business and midmarket clients in the gaming, e-commerce, and advertising industries. Services include social media marketing, mobile app marketing, and PPC.

    Clients

    • Tesco
    • Wicked Gummy Co
    • Millionaire Beauty
    • Vitamasques

    Industries

    Notable Project

    Pixated handles digital marketing services for a cosmetics company. In efforts to increase the brand's online presence, their team provides advertising and SEO efforts as well as makes website tweaks as needed.

    “They deliver on their promises.”

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