Top 10 ReactJs

Companies in London

London is a lively capital and a leader in technology and fintech. In the first quarter of 2024, over 7,250 tech companies were set up, showing the city's strong growth. The value of London’s tech sector has increased to over £600 billion, with venture capital investment rising by 800% since 2014. London has more unicorn companies, or tech firms worth over $1 billion, than any other city in Europe. Several factors drive this success, including strong investment opportunities, a growing fintech scene, and a diverse talent pool in areas like AI, cybersecurity, and green tech. The startup scene in London is thriving, keeping the city at the top in Europe for tech growth. However, challenges like economic uncertainty and the need for affordable tech workspaces still exist. As these issues are tackled, London’s tech sector is set for even more success.

How Did We Pick the Best?

1

Creative Navy

LondonUnited Kingdom

Team Size 10-49
Cost of Services $$$$$ $70-150/h
2025 Awards Winner

Service Focus:

UX/UI DesignWeb DesignAccelerated Mobile Pages + See more

Description

Creative Navy is a UX/UI design studio specializing in complex, high-stakes applications for industries like healthcare, manufacturing, automotive, and energy. Known for evidence-based methods, they excel in embedded GUIs, touch interfaces, and technical software for professionals, balancing usability with operational constraints. Their team blends cognitive science and HMI expertise, trusted by clients such as Miele, Bosch, and Ford. With hubs i...

Our Take

Considering their vast industry know-how, positive customer feedback, and successful project showcases on TechBehemoths, you can trust Creative Navy to be your partner in building your IT project.
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2

Pixelette Technologies

LondonUnited Kingdom

Team Size 250-999
Cost of Services $$$$$ $30-70/h

Service Focus:

Artificial IntelligenceBlockchainMobile App Development + See more

Description

Pixelette Technologies has been awarded ‘Best AI Agency’ in the UK three times by the Scottish Business Awards along with many other accolades. Whether you’re a budding entrepreneur with limited tech skills, an established business moving towards rapid expansion, or a government functionary looking to redefine efficiency, we offer end-to-end IT services in the realm of AI and Blockchain.  We see tech as a means to...

Our Take

Pixelette Technologies works with small and medium enterprises as well as start-ups. The company's priority is customer happiness, which is built on teamwork and passion. We invite you to take a look at their offerings and decide if they are a good fit for you.
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3

Mativus

LondonUnited Kingdom

Team Size 2-9
Cost of Services Not revealed
2025 Awards Winner
2024 Awards Winner
2023 Awards Winner

Service Focus:

Web DevelopmentWeb DesignUX/UI Design + See more

Description

Mativus: Building Fast, Secure, and Scalable Websites for the Modern AgeMativus is a UK and Dubai-based digital agency specialising in the Mativus System a high-converting infrastructure built specifically for coaches. We bridge the gap between coaching excellence and business scalability by building automated, lead-generating frameworks. By focusing on structural efficiency and strategic design, we turn your professional activity into a consiste...

Our Take

Mativus is a trusted agency with rich experience, positive customer feedback, an ample portfolio, and strong testimonials. Their TechBehemoths profile effectively showcases their industry experience and knowledge.
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4

Digitalhound Ltd

LondonUnited Kingdom

Team Size 10-49
Cost of Services $$$$$ $150-250/h
2025 Awards Winner
2024 Awards Winner
2023 Awards Winner

Service Focus:

SEOContent MarketingMarketing Strategy + See more

Description

Unleash your brand's online potential and boost customer retention with Digitalhound!WHO ARE WE?Digitalhound is a multi-award-winning SEO agency in London, delivering high-impact services for ambitious brands and local businesses across the UK, Europe, and North America. Our digital marketing and SEO experts bring over 20 years of expertise, offering cutting-edge strategies tailored to each client's unique needs.We thoroughly analyse and improve...

Our Take

Based on our selection criteria, Digitalhound Ltd is one of the most reliable service providers in London. Their experience is 12 years, and more than 4 projects delivered reflects their reputation level.
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5

Plavno

LondonUnited Kingdom

Team Size 50-249
Cost of Services $$$$$ $30-70/h
2025 Awards Winner
2024 Awards Winner
2023 Awards Winner

Service Focus:

Mobile App DevelopmentArtificial IntelligenceAR/VR Development + See more

Description

Plavno is an AI-first software development company that helps businesses design, build, and scale intelligent digital products. We work with startups, enterprises, and technology-driven organizations that want to turn innovative ideas into reliable, high-performance solutions.Our multidisciplinary team covers the entire product lifecycle — from business analysis and product strategy to UI/UX design, custom software development, quality assurance,...

Our Take

Known for its credibility, Plavno has vast experience, excellent customer feedback, and a strong portfolio. Their TechBehemoths profile is proof of their experience and knowledge in the field.
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6

Timspark

LondonUnited Kingdom

Team Size 50-249
Cost of Services $$$$$ $30-70/h
2025 Awards Winner
2024 Awards Winner

Service Focus:

IT Staff AugmentationCustom Software DevelopmentWeb Development + See more

Description

Timspark is a UK-registered custom software development and IT consulting partner helping companies scale engineering capacity, modernize technology, and deliver reliable digital products.The company combines staff augmentation, dedicated development teams, full-cycle product development, and its Core Teams model — pre-built, domain-focused engineering squads designed to take ownership of complex business and technical challenges.With access to 1...

Our Take

Timspark is a dedicated team delivering results. Each member brings unique skills and love for what they do. Their attention to detail ensures that every client receives personalized and effective solutions. Check out their portfolio on TechBehemoths to see more Timspark projects.
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7

Mobiteam UK

LondonUnited Kingdom

Team Size 2-9
Cost of Services $$$$$ $70-150/h
2025 Awards Winner
2024 Awards Winner
2023 Awards Winner

Service Focus:

Web DevelopmentE-Commerce DevelopmentWeb Design + See more

Description

Mobiteam does custom Web Design and Development. It is specialized in designing aesthetically beautiful and high-quality websites for corporate, personal and eCommerce. Our clients get websites that sell, attract and obtain market and customer’s respect. The company is located in London and distributed in Berlin and Chișinau to have the chance to work with the best specialists without compromising the qualit...

Our Take

Mobiteam UK works with small and medium enterprises as well as start-ups. The company's priority is customer happiness, which is built on teamwork and passion. We invite you to take a look at their offerings and decide if they are a good fit for you.
View profile Contact Mobiteam UK
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