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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

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.
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2

Contra Agency

LondonUnited Kingdom

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

Service Focus:

Web DesignWeb DevelopmentDigital Marketing + See more

Description

Your Results-Driven Digital PartnerWe are creative thinkers and digital doers with a proven track record spanning over 25 years. From the early days of dial-up, we have evolved into a leading digital agency dedicated to accelerating growth, driving traffic, and converting leads into lifetime customers for our clients globally.Who We HelpWe specialise in high-impact digital strategy and services for complex, demanding sectors:Legal Services and Pr...

Our Take

Contra Agency has built a solid reputation as a reliable agency through years of experience, satisfied clients, and a diverse portfolio. Their TechBehemoths profile perfectly captures their industry know-how and skills.
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3

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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4

Passion Digital

LondonUnited Kingdom

Team Size 10-49
Cost of Services Not revealed
2025 Awards Winner
2024 Awards Winner

Service Focus:

SEOPay Per ClickDigital Strategy + See more

Description

Passion Digital is an award-winning digital marketing agency based in Holborn, London, specialising in SEO, content marketing, PPC, paid social and programmatic. Founded in 2012, we blend performance with imagination to help brands like Mazda, Octopus Investments and Knight Frank grow through innovative, results-driven strategies. As an independent agency, we stay agile, collaborative and always push boundaries. With a passion for problem-solving...

Our Take

Passion Digital 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 Passion Digital projects.
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5

Base Creative

LondonUnited Kingdom

Team Size 2-9
Cost of Services $$$$$ $150-250/h
2025 Awards Winner
2024 Awards Winner
2023 Awards Winner

Service Focus:

Digital StrategySMMSEO + See more

Description

We’re Base Creative, a B Corp™ certified, digital marketing agency bringing engagement and visibility to your website, content and brand. We work with national and global brands that want to grow through creative and data-driven marketing strategies.Established in 2003, we have a wealth of digital experience. In that time, we’ve created and launched over 220 digital campaigns.SEO & PPCDriving qualified traffic from search engines and search a...

Our Take

Known for its credibility, Base Creative 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

Accuracast

LondonUnited Kingdom

Team Size 10-49
Cost of Services $$$$$ $250+/h
2025 Awards Winner

Service Focus:

SMMSEOPay Per Click + See more

Description

Accuracast is an international digital marketing agency helping brands enter, test and scale across multiple markets through paid media, international SEO, GEO / AEO, social media marketing and data-led online advertising. Founded in 2004, Accuracast has supported more than 200 clients across financial services, B2B, travel and hospitality, ecommerce and sports. The agency works with businesses running campaigns across countries, languages and...
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7

Launch Mappers

LondonUnited Kingdom

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

Service Focus:

Email MarketingDigital StrategyAdvertising + See more

Description

Launch Mappers is an independent boutique that helps online brands grow their revenue through growth and digital marketing services.Uncover your path to growth with a step-by-step map to guide you towards success, and an on-demand growth team to implement your plans into action.We've spent years refining our methodology to support online brands in their growth.Part I: The Launch SprintThe Launch Sprint is the in-house methodology we built that al...

Our Take

Considering their vast industry know-how, positive customer feedback, and successful project showcases on TechBehemoths, you can trust Launch Mappers to be your partner in building your IT project.
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8

Synmek Ltd.

LondonUnited Kingdom

Team Size 2-9
Cost of Services $$$$$ $150-250/h

Service Focus:

BrandingPRMarket Research + See more

Description

Synmek is a London-headquartered digital product agency founded in 2016 in Toronto. We've shipped 120+ products in our first decade — websites, mobile apps, SaaS platforms, and e-commerce stores — for clients ranging from London SMEs to international startups and established enterprises.Unlike most agencies our size, we keep every discipline in-house: research, UX/UI, brand, custom development, infrastructure, and digital marketing. No subcontrac...

Our Take

Synmek Ltd. is one of the local market leaders and stands out for its quality, trust, commitment, and constant growth. These values have helped them to rank among the top IT services providers on Techbehemoths, to deliver successful projects and to get satisfied clients and visibility.
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