Looking for a top ReactJS development company in London?

Open source JavaScript library ReactJS is known as a simple and flexible way to build user interfaces. Facebook maintains ReactJS and was the impetus behind its creation. ReactJS helped Facebook create interactive and dynamic user interfaces while maintaining fast website performance. If this scenario matches your business's needs, consider hiring a ReactJS developer.

To assist you in your search for a partner, we’ve compiled this list of the top React developers in London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs. If you need more support, tell us about your project, and we'll match you with recommended companies.

List of the Best London React Development Services

  • 1
    $25,000+
    50 - 249 Employees
    London United Kingdom

    Thoughtbot is a web and mobile app development company based in Boston, MA with offices in Austin, San Francisco, New York, Raleigh, Washington D.C, and London. Since 2003, this 50+ team has delivered empowering digital solutions to enterprise-level and small companies alike.

    Clients
    LOLA
    LevelUp
    Tile
    Code Climate
    Industries
    Notable Project

    Thoughtbot’s team helped the client develop a custom software solution aimed at enhancing consumer advocacy. With deliverables mostly on the back-end, the client valued the estimable coding skills, rapid completion time, and commitment to quality.

    “They provide a consistent level of service that I haven’t seen from agencies or even our in-house team. Their engineering standards, development standards, and the way that they have that consistently through their team is very impressive.” – Head of Product, Consumer Interest Nonprofit

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  • 2
    $25,000+
    50 - 249 Employees
    London United Kingdom

    Infinum is a software development company in San Francisco, CA. The 50+ team has equal experience in mobile and web development. They work with clients from a variety of industries, including business and financial services and automotive.

    Clients
    Bayer
    Samsung
    Universal Music Group
    T-Mobile
    Industries
    Notable Project

    Infinum rebuilt a flight booking app for a startup. The original app was extremely buggy and the company needed further support. One feature Infinum developed allowed customers to sync their calendars to find flights that work around their schedule.

    “While many agencies limit your choices, it was quite different with Infinum. They were clear and upfront about what resources we were getting and why and offered us options, which was really nice.” – Senior Project Manager, App Startup

  • 3
    $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
    Wall Street Journal
    Leicester Tigers
    The Sun
    Industries
    Notable Project

    Clock Limited redesigned a website for a news and media outlet. The team also built a custom CMS for the client. The site forms the foundation of the internal team's business.

    "The CMS is fantastic and they have been very receptive to our ideas, no matter how big or small." – Site Editor, News Outlet

  • 4
    $10,000+
    250 - 999 Employees
    London United Kingdom

    TkXel is a mobile app and web development company founded in 2007. With its headquarters in Reston, Va., and an office in Lahore, Pakistan, they have a team of 318 employees. Their services include mobile app development, web development, and custom software development. They primarily serve small and midmarket clients. 

    Clients
    Verizon
    Toyota
    NBC Universal
    Groupon
    Industries
    Notable Project

    TkXel provided web development services for a marketing and advertising agency. They helped migrate a custom architecture that included e-commerce, search, browsing, and advertising functions. The project involved NodeJS, .NET, AngularJS, PHP, Java and Ruby. Efficiency of the company has increased because of the partnership with TkXel. 

    “I appreciate the fact that, even though they are an offshore company, in order to stimulate a project in its early stages, TkXel sent their developers and lead partners onsite to work with our team and gain a familiarity with what our needs are." – CTO, Marketing and Advertising Company 

  • 5
    $10,000+
    10 - 49 Employees
    London United Kingdom

    Ester Digital is a web design agency based in Tallinn, Estonia. Founded in 2015, the team of 7 specializes in web design, graphic design, and logos. They work mostly with small business clients, and primarily work within the advertising and marketing, information technology, and business services industries.

    Clients
    Tappi
    Adzoola
    Terve
    Clinic 77
    Industries
    Notable Project

    Ester Digital worked with a tech startup to redesign their logo and develop its company website. The client was amazed by the graphic design skills of Ester Digital’s team and started to use the new logo for all its marketing.

    “We are proud of how the new logo represents us. We currently use the logo and guidelines to create new marketing materials.” – Head of Marketing, Tech Startup

  • 6
    $25,000+
    50 - 249 Employees
    London United Kingdom

    Mobile app development company Tapptitude has offices in Romania, the US, and London. The team of 40+ employees specializes in iOS and Android app development and offers UX/UI design, IT strategy consulting, and web development. Founded in 2013, Tapptitude mainly works with small businesses and startups in the real estate, automotive, and arts and entertainment industries.

    Clients
    Honda
    Vias Wine
    SmartDreamers
    Dine Market
    Industries
    Notable Project

    Tapptitude developed an app prototype for a food ordering company. They executed the food ordering company’s vision perfectly and were retained to develop the full product. Some app features Tapptitude developed included platform signup, payment systems, and restaurant menu integration.

    “The proof that I’ve been happy with Tapptitude is that we’ve continued working long-term, even though I’ve had the option to use in-house developers. I felt that the communication was great and, most importantly, the quality Tapptitude provides is amazing, as is the communication.” – CEO, Food Ordering App

  • 7
    $25,000+
    10 - 49 Employees
    London United Kingdom

    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.
     

    Clients
    Admiral
    Cleo.
    BNP Paribas
    Voodoo
    Industries
    Notable Project

    Theodo UK developed the platform for an online marketplace after the previous developer proved unsatisfactory. The team took wire frames and a prototype provided by the client to build a minimum viable product, using AWS, React, Python, and Django for the framework. The client spoke highly of the engagement.

    “They’re extremely knowledgeable and work closely with us to make sure we know what’s going on. Their team is phenomenal and have both dev and interpersonal skills.” — Executive, Digital Office Marketplace

  • 8
    $25,000+
    10 - 49 Employees
    London United Kingdom

    Imaginary Cloud is an award winning Software Development and UX/UI Design company that follows a unique User-Centric Product Design Process. Founded in 2010, with offices in the UK and Portugal, it has helped build & launch more than 200 web/mobile applications worldwide together with industry leading clients.

     
    Clients
    Nokia
    Sage
    Ernst & Young
    BNP Paribas
    Industries
    Notable Project

    Imaginary Cloud worked on custom software development for an enterprise software platform. Using Angular and Node.js and working from designs, their team built the product with a configurable frontend. They continued to provide support and the client was very pleased with the team’s work.

    “Imaginary Cloud created the entire architecture for our app and designed it for large user populations. The platform helped us grow significantly, which led us to win millions of pounds worth of contracts. Their team is intrinsic to our success.” – Strategy Director, Enterprise Software Platform

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

    Appetite Creative Solutions is a creative digital marketing agency in London, England – with offices in Madrid and Dubai, too. Established in 2015, Appetite Creative Solutions has a team of 25 employees. They offer logo, web design, games development, and social media marketing services.

    Clients
    Starbucks
    Bacardi
    Coca Cola
    Tetra Pak
    Industries
    Notable Project

    Appetite Creative Solutions developed a marketing campaign for a digital sales company to increase exposure. They created mockups, high-impact ads, and eye-catching marketing games. The clients' were pleased with the innovative designs.

    "They’re hands-on, accommodating, and creative." – Marketing & Advertising Professional, Digital Sales Company

  • 10
    $10,000+
    2 - 9 Employees
    London United Kingdom

    Browser London is a digital product agency based in London, United Kingdom. This company has 11 employees and was founded in 2008. Services offered by Browser London include UI/UX design, web design, and custom software development for companies of all sizes.

    Clients
    Gov.uk
    Mayor of London
    Lightning API
    Industries
    Notable Project

    Browser London provides ongoing development work and UX design with a creative agency. Their work involves JavaScript coding, UI/UX design, and additional aspects of technical development.

    "They’re a knowledgeable team. Using their modern, forward-thinking outlook, they delivered a beautiful product. They’re experienced and dedicated, allowing them to ensure that the project is spot-on." Strategy Director, Creative Agency

  • 11
    $10,000+
    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
    Industries
    Notable Project

    Thought&Function developed an app for a personal finance company. The app was built entirely from scratch using React Native for both Android and iOS platforms. The app was released earlier than scheduled.

    “For me, what sets them apart is the relationship.” - Founder, Personal Finance Company

  • 12
    $100,000+
    50 - 249 Employees
    London United Kingdom

    Myplanet is a software studio headquartered in Toronto, Ontario, with additional offices in Vancouver, British Columbia, and Chicago, Ill. Founded in 2009, Myplanet's team of around 90 specializes in web development, web design, and e-commerce development, primarily for midmarket and enterprise clients in financial services and media.  

    Clients
    CenturyLink
    DigitalOcean
    Google
    Dow Jones
    Industries
    Notable Project

    A cloud platform developer hired Myplanet for assistance with digital strategy, information architecture, and user experience. The client's goal was to rebrand and reposition its digital presence as it moved away from providing hardware to providing cloud services. The client appreciated Myplanet's "customer-centric" approach to project management.

    "From day one to January 2015, we experienced a 300% increase in site traffic and 200% increase in leads coming from the web. Our bounce rate went down and our net promoter score went up." - Chief Marketing Officer & SVP of Business Operations, Cloud Platform Developer 

  • 13
    $10,000+
    50 - 249 Employees
    London United Kingdom

    Code&Care is a full-stack software development company based in Austin, Texas, and founded in 2015. With over 50 employees, they offer web development, IT staff augmentation, and mobile app development solutions to small and mid-market agencies alike.

    Clients
    Hubwise
    Viven Health
    Connect A Voice
    Industries
    Notable Project

    Code&Care provided IT maintenance services for a disability data provider. The provider needed a partner to work on their production system. Code&Care was able to provide sufficient solutions for the provider.

    “Good, they’re aware of what’s going on.” - CEO, Disability Data Provider

  • 14
    $5,000+
    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 GEIE
    Branded Entertainment - BEN Group
    , Portuguese Catholic University
    Industries
    Notable Project

    Marzee Labs recently worked on multiple web designs for a TV station. They provided Drupal development and worked on the main websites and the project was successful.

    “Their ability to always find new talents and recruit some good developers impressed me.” – Project Manager, TV Station

  • 15
    $10,000+
    50 - 249 Employees
    London United Kingdom

    AppSierra Solutions is a software testing company based in Noida, India, with an office in New Delhi. Founded in 2015, their team currently consists of less than 10 employees. They offer services in application testing, custom software development, and mobile app development. They primarily serve clients in the consumer products, e-commerce, and media industries.
     

    Clients
    Net Matrix Solutions
    Flight Level Media
    ShareDesk
    Pro-Posal
    Industries
    Notable Project

    AppSierra Solutions provided WordPress development and SEO for a web development company. They incorporated backend additions and plugins for a major improvement initiative to the online system. They continue to provide SEO and app builds. The client was impressed by their motivation.

    “They're organized, have a wide skill set, and guide clients in a way that promotes results. At the same time, they’re flexible enough to accommodate our idiosyncrasies. They delivered solid work and met our deadlines consistently.” – CEO & Project Manager, Web Development Company
     

  • 16
    $10,000+
    10 - 49 Employees
    London United Kingdom

    SO technology is a design & technology company based in Cranfield, U.K., with an office in London. The company, founded in 2007, has a team of around ten that provides e-commerce development, web development, custom software development, digital strategy, mobile app development, UX/UI design, and web design services. SO technology serves small and mid-market companies in the e-commerce, business services, energy & natural resources, retail, and education industries.

    Clients
    bakerdays
    House of Hackney
    Tom Dixon
    Bernhardt Furniture
    Industries
    Notable Project

    An education app provider hired SO technology to develop a math teaching app. As part of the engagement, SO technology designed the app's architecture, outlined rudimentary designs, developed the database and back end, built an admin site, and built a game for the platform. The platform was completed and became popular among children, parents, and teachers. SO technology continues to provide technical support.

    "They’re very versatile. I know that I can ask them to handle a bunch of different tasks, and they will be able to manage it." - Owner & Director, Education App Provider

  • 17
    $10,000+
    10 - 49 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
    TOAD
    Copofi
    Tona
    Triptalk
    Industries
    Notable Project

    Tech Alchemy developed a new UX for an existing cross-platform mobile app prototype for a health startup using Flutter. The team went through three sprints to deliver the product. Their work helped the client simplify a complex app.

    "We were able to drastically simplify a complex app and release it to our corporate clients." –CTO & CPO, Health Startup

  • 18
    $50,000+
    10 - 49 Employees
    London United Kingdom

    Chelsea Apps is a software company based in London, with offices in Chicago and Bournemouth, England. Since 2010, their team of less than 50 has provided mobile app development, UX/UI design, and web development assistance to mid-market firms as well as other clients such as startups and enterprises. They have experience working in industries such as consumer products, retail, and business services.

    Clients
    Transport for London
    Ladbrokes
    Vanquis
    Industries
    Notable Project

    Chelsea Apps built an SDK for a customer feedback corporation. The SDK was to be inserted in customers' own mobile applications for better testing. It needed to be easy-to-understand for development teams to work with easily. Chelsea Apps made an SDK that was compatible for both Android and iOS.

    "We're in the early days, but we've had 3 clients sign up to use the SDK and 2 of those clients are releasing updates to there own apps in the next month, so we're excited to see the user feedback, but the developer feedback so far has been great." - CTO, Customer Feedback Co.

  • 19
    $10,000+
    10 - 49 Employees
    London United Kingdom

    Indie Ridge Limited is a small web design company located in London, United Kingdom. Established in 2016, the team specializes in web design, web development, ux/ui design, e-commerce development, and more.

    Notable Project

    Indie Ridge provides web development services for the owner of a media consultancy firm. The team is responsible for building a website to improve the client's online presence and promote their services.

    "Their speed is excellent. They're always available and easy to work with."

  • 20
    $50,000+
    10 - 49 Employees
    London United Kingdom

    AVAMAE is a software solutions agency run by a team of fewer than 50 professionals founded in 2011. Based in London, the company offers custom software, web, and mobile app development services for small and medium-sized businesses from various industries, such as business services, financial services, and health care.

    Clients
    Imperial College London
    Asda
    Strengthscope
    Notable Project

    AVAMAE worked with a B2B auction platform by providing a technical solution to physical problem. An app was built as a result, and it featured a multi-level, B2B platform to conduct and participate auctions through. The Microsoft-based app allows for simultaneous listing and bidding at the same time across many devices.

    "Because of their work, we were able to launch the product and begin onboarding companies. We already have over 150 businesses signed up, and we’re beginning to see traction as well. At this point, we’re crowdfunding to expand our services. The site looks amazing, and their team continues to work very closely with it to ensure that it keeps improving over time. It’s been a great collaboration." - CEO, B2B Auction Platform

  • 21
    $10,000+
    10 - 49 Employees
    London United Kingdom

    Codest is a software development company that was founded in 2009 and has offices in Krakow and Warsaw, Poland. They have 40 employees specialized in the end-to-end building of custom products, primarily for companies in e-commerce, marketplace, adtech, fintech, proptech and SaaS. Services include backend, frontend and product design.

    Clients
    Gazeta Wyborcza
    Helpling
    Kesko Senukai Digital
    Yogobe
    Industries
    Notable Project

    Codest developed the frontend and backend of a web-based tool for booking targeted online ads for a media company. The client found value in their nuanced understanding of industry needs, fluid communication, and high reliability. They enhanced the product using Ruby on Rails and JavaScript, and it has dramatically increased revenue and contributed to business growth.

    “Codest’s work has had a positive effect on our income. The platform makes it easier for our team to sell ads, which has resulted in increased business. It’s also being used by external customers, making it one of our most important products.” – Head of Development, Media Company

  • 22
    $1,000+
    2 - 9 Employees
    London United Kingdom

    Mojo Digital is a web development company. Their small team is headquartered in Nicosia, Cyprus and London, United Kingdom. Their services include web development, web design, branding, and product design. The firm was founded in 2020.

    Industries
    Notable Project

    Mojo Digital was hired to develop a website for a financial literacy program. They were responsible for the front- and backend development, as well as managing the content and compliance certificates.

    "They worked hard on our project, and they were very understanding when we had some delays on our part."

  • 23
    $10,000+
    2 - 9 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
    SeedLegals
    Amazon
    Conductor
    We Group
    Industries
    Notable Project

    Together created a WordPress marketing website for a legal tech platform. The team built the site from scratch and provided UI/UX designs, ensuring a strong local presence.

    "I was impressed with their ability to understand the product that we sell. They also have a strong knowledge of selling products for startups." – Data & Growth Lead, Legal Tech Platform

  • 24
    $10,000+
    10 - 49 Employees
    London United Kingdom

    We Are Kitty is a small London, United Kingdom-based user experience design company. Founded in 2017, the team provides ux/ui design, e-commerce development, web design, web development, and more.

    Industries
    Notable Project

    A household staff recruitment agency hired Kitty to rebrand the company and develop their website from scratch. The goal was to improve customer and candidate conversions.

    "I couldn't be happier with the outcome."

  • 25
    $10,000+
    50 - 249 Employees
    London United Kingdom

    Located in Ahmedabad, India with additional offices in the US and UK, Innovify has been delivering high quality solutions since 2011. Although the team of nearly 130 specializes in mobile app development, they also engage in growth hacking, consulting, and UX design.

    Clients
    Microsoft
    BBC
    The Wall Street Journal
    HSBC
    Industries
    Notable Project

    One of Innovify’s clients, an on-demand delivery platform, wanted to streamline how merchants and businesses placed orders and how they assigned drivers. Innovify developed an Android app and website and helped with marketing and strategy.

    “I have worked with a couple of these companies before, but they haven’t been as process-oriented as Innovify. They have good processes in place and everything was good for me.” – Founder, Logistics Company

  • 26
    $5,000+
    2 - 9 Employees
    London United Kingdom

    Milo Creative is a digital studio located in London. Founded in 2002, it has a team of 17 that specializes in mobile app development, UX/UI design, and web development services. They work with companies in various industries including education, health care & medical, and advertising & marketing.

    Clients
    Sony Music
    Paul Smith
    WaterAid
    Industries
    Notable Project

    Milo Creative built a mobile app to create coverage for a third party client. The team designed the platform's UX and UI, then developed methods for data importation. The app gained thousands of users in a short period of of time while generating the buzz that the client desired.

    “Within the first few days, the app earned over 10,000 users, which was great for such a niche app. It was the perfect tool to get our client’s project in front of journalists to generate awareness.” –Head of Production, Tech Communications Agency
     

  • 27
    $5,000+
    10 - 49 Employees
    London United Kingdom

    Imobisoft is a full-service mobile app & software development company based in Coventry, U.K., with an office in London. The company, founded in 2007, has a team of more than ten that provides custom software development, digital strategy, IoT development, web development, BI & big data consulting & SI, and SEO services. Imobisoft serves midmarket and other-sized companies in the medical, manufacturing, utilities, energy & natural resources, financial services, ane e-commerce industries. 

    Clients
    NHS (Multiple divisions)
    BSkyB
    E-Energy
    Northern Gas Networks
    Industries
    Notable Project

    A software startup hired Imobisoft to help develop their gifting mobile app. Imobisoft developed the frontend and backend of the app using three different coding languages. The app features promotion pages, maps, GPS payment methods, and user wallet. Imobisoft met all expectations with the completed project, and the app passed all tests. 

    "They’ll find a solution if you’re stuck. They’ll find a way to make something possible." - CEO, Software Startup

  • 28
    $5,000+
    10 - 49 Employees
    London United Kingdom

    KUBAS Labs is a web development company founded in 2012 in London with more than 10 professionals. They provide e-commerce, custom software, and web development solutions to clients that work in the industries of advertising, business services, and e-commerce.

    Clients
    TrustCorp
    Industries
    Notable Project

    KUBAS Labs developed a web and analytics tool for a digital marketing firm. The firm was working with a client to find a solution that could track data better than Google Analytics. The client was happy with the website tool that KUBAS Labs developed.

    “They have a very high-skilled e-commerce development division with experience in Magento, WordPress, and Shopify.” - CEO, Digital Marketing Firm

  • 29
    $1,000+
    10 - 49 Employees
    London United Kingdom
    Established in 2011, iConnect info solutions pvt ltd is a web development firm. They are headquartered in Navi Mumbai, India and London, United Kingdom and have a small team. Their services include web development, IT staff augmentation, mobile app development, and cloud consulting & SI.
    Industries
    Notable Project

    An industrial tools company hired iConnect info solutions pvt ltd to provide custom software development services. They are tasked with developing and designing the company's website.

    "Their expertise and speed of execution of the platform have been impressive."

  • 30
    $25,000+
    50 - 249 Employees
    London United Kingdom

    Headquartered in Kiev, DataMix is a development company with locations in Pittsburgh and London. Since 2015, their team of 18 has been specializing in custom software development, web development, and artificial intelligence. 

    Clients
    GRC
    Crysberry
    Unisender
    Etoso
    Industries
    Notable Project

    An automotive company hired DataMix to design different landing pages for various automotive models. They also perform web management and maintenance. The landing pages were completed within the set timeline and budget.

    "They have a great understanding." – Director of Digital Marketing, Automotive Company

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Based on your budget, timeline, and specifications we can help you build a shortlist of companies that perfectly matches your project needs. Schedule a free consultation with a Manifest Analyst.

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