Top 10 JavaScript

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

Digiruu

LondonUnited Kingdom

Team Size 2-9
Cost of Services $$$$$ $70-150/h

Service Focus:

Mobile App DevelopmentUX/UI DesignWeb Design + See more

Description

Digiruu is an award-winning mobile app development company, with +10 years of experience in designing and developing apps for startups and businesses across multiple industries with the aim of generating results.  Our previous work includes creating the Official Climate Week NYC app for the largest climate summit in the world, the UK’s first branch-free mobile phone network Moblox, and even the official ByErim app for social media influencer Erim...

Our Take

Known for its credibility, Digiruu 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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2

Designbub

LondonUnited Kingdom

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

Service Focus:

BrandingSEOWeb Design + See more

Description

Welcome to DesignBub, where we provide unique and professional design services to make your vision a reality. Our objective is to provide high-quality design solutions to organizations of all sizes, enhancing brand identification and captivating consumers. With a team of talented designers who specialize in logo creation, web design, and graphic design, we ensure that each project is handled with creativity and precision. 1. Logo Design: Create...

Our Take

Out of 50,000 IT companies listed on TechBehemoths, Designbub is one that we could recommend for their services. Their reputation lies on facts such as 3 years of experience, 11 projects delivered and more than 10 happy clients. It is very likely that they could help you with your next IT project
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3

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.
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4

Bird Marketing

LondonUnited Kingdom

Team Size 10-49
Cost of Services $$$$$ $70-150/h
2025 Awards Winner
2024 Awards Winner

Service Focus:

Digital MarketingSMMSEO + See more

Description

We are a award-winning digital marketing agency with a proven track record of delivering exceptional results for businesses worldwide. With offices in London, New York, and Dubai, we combine global expertise with local insights to help brands thrive in competitive markets. Our talented team is passionate about crafting innovative solutions that drive growth and enhance brand visibility. Our Services: At Bird Marketing, we offer a wide range of s...

Our Take

Bird Marketing 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 Bird Marketing
5

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 partner with delivery centers across Europe (Poland, Lithuania, Georgia) and a distributed presence including Latvia. We bring together 1,000+ vetted engineers and 30+ pre-built teams, serving 200+ clients across finance, healthcare, retail, logistics, manufacturing, and more.How we engageWe offer Core Teams (pre-built, domain-savvy units with clear ownership), Dedicated Teams, Team Augmenta...

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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6

Creative Navy

LondonUnited Kingdom

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

Service Focus:

UX/UI DesignWeb DesignProduct Design + 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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7

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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8

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 IntelligenceCustom Software 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.
View profile Contact Plavno
9

ExpandX Marketing & Web

LondonUnited Kingdom

Team Size 10-49
Cost of Services $$$$$ $70-150/h
2025 Awards Winner
2024 Awards Winner

Service Focus:

Marketing StrategyWeb DevelopmentSMM + See more

Description

Digital & Web Solutions for Business Growth ExpandX is an award-winning, full-service digital agency and web solutions provider servicing clients in North America, Europe and Middle East since 2015.  Main areas of expertise: Web Development  E-commerce websites development Video Marketing  Digital Strategy  Social Media Marketing Digital Marketing...

Our Take

ExpandX Marketing & Web 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 ExpandX Marketing & Web
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