The Biggest Tech Companies in London in 2024

London's tech sector is a driving force for innovation across the UK and internationally. Find out which London companies are leading the way for growth and revenue in 2023.
09.05.23 Charles Griffiths

The UK tech sector is worth $1 trillion.

Tech businesses have helped make the UK Europe’s leading tech ecosystem and the main challenge to the US and China. As the capital city, London is home to many of these companies, from innovative startups to international unicorns (privately-owned businesses with a valuation of over $1 billion).

But which London companies are leading the way for growth and innovation in the sector? We’ve listed some of the top tech companies with headquarters in London, based on growth and market valuation.

The fastest-growing London tech companies in 2023

Below are the top 5 fastest-growing tech companies based in London. Data from Deloitte.

Tripledot Studios – 69,387% growth

Tripledot Studios is a mobile gaming company founded in 2017. In just six years, the studio has established itself as a leader in mobile gaming.

Tripledot focuses on creating free-to-play mobile games that are easy to learn while remaining challenging and rewarding to play. The studio has developed a number of popular titles, including ‘Solitaire’ and ‘Woodoku’, which together have more than 60 million downloads on the Google Play Store.

Tripledot Studios prides itself on its indi-style approach to game creation, combining creativity with data to make accessible, enjoyable games.

Plum Fintech – 7735% growth

Plum Fintech provides an AI-powered personal finance management app. The app connects to users’ bank accounts and uses AI algorithms to analyse their spending habits, identify opportunities to save money and provide recommendations on how to manage their finances better.

Plum Fintech was founded in 2016 and has since grown to become one of the leading fintech companies in the UK. The Plum app has over 1.5 million users in Europe, helping them save and invest more than £1.6 billion.

Cera Care – 5707% growth

Cera Care is a technology-enabled care provider that specialises in delivering in-home care services to elderly and vulnerable people. The company was founded in 2016 with the aim of using technology to improve the quality and efficiency of care delivery.

Cera Care leverages advanced technologies such as AI, machine learning, and predictive analytics to match clients with the most appropriate care providers and optimise care service delivery. By monitoring patients digitally, Cera Care can respond to any deterioration 30-fold faster than traditional methods.

Cera Care offers in-home care services like personal care, companionship, medication management, and dementia care. The company’s mission is to use technology to transform the care industry and to improve the lives of elderly and vulnerable people across the UK.

Cudo Ventures – 4240% growth

Cudo Ventures aims to ‘redefine the economics of computing’. Its monetisation applications allow users to monetise their idle computing resources, such as CPU and GPU power, and sell them to businesses that require additional computing capacity for tasks such as data processing, rendering, and machine learning.

Cudo Ventures was founded in 2017 and has since grown to become one of the leading providers of decentralised computing solutions in the UK. One of its products is Cudo Miner, an auto crypto mining application that reduces manual configuration and intervention by up to 95%. Another is Cudos, a decentralised cloud computing network that unites blockchain and the cloud.

Xydus (previously Paycasso Verify) – 2053% growth

Xydus provides advanced identity verification solutions for businesses operating in regulated industries such as finance, gaming, and e-commerce. It simplifies identity verification, onboarding, authentication, risk, and cost management with a single platform.

Xydus was originally founded as Paycasso Verify in 2012 with the aim of using advanced technology to improve the efficiency and accuracy of identity verification processes. Xydus applications are meant to be easy to use and highly scalable, focusing on transparency, flexibility and simplicity. In May 2022, the company name changed to Xydus.

it support london

The London tech companies with the largest valuations – $35.4 billion is the UK’s most valuable fintech company. It was founded in 2012 as a cloud-based payment platform with the mission of helping businesses thrive in a digital economy.’s payment processing platform is designed to be highly flexible and customisable, allowing merchants to tailor their payment processing to their specific needs.

Revolut – $27.8 billion

Revolut is best known for its money management app, which allows users to ‘send, spend and save smarter’ and has been downloaded more than 10 million times on the Google Play Store.

The company was founded in 2015 with the aim of creating a digital alternative to traditional banking services. More than 28 million people use Revolut, as well as over 500,000 business users. The app is supported in 200 countries and regions, with 29 in-app currencies.

Global Switch – $9.6 billion

Global Switch designs, builds and operates data centres that offer high-quality infrastructure for businesses to host their IT systems and store their data.

Global Switch was founded in 1998 and has since become one of the largest data centre providers in the world, with a network of 13 data centres spread across Europe and Asia-Pacific.

Global Switch’s highly secure data centres feature state-of-the-art technology to ensure maximum uptime, reliability, and performance. It is one of the world’s highest credit-rated data centre providers.

Global Switch’s customers operate in industries ranging from finance to telecommunications to media and technology. The company has a strong commitment to sustainability and operates its data centres in an environmentally responsible manner, using energy-efficient technologies and renewable energy sources wherever possible.

Hopin – $7.95 billion

Hopin is a virtual events platform that allows individuals and organisations to host and attend virtual events, conferences, and webinars. The platform was founded in 2019 and quickly became a popular alternative to in-person events, especially during the Covid-19 pandemic.

Hopin offers a range of audience engagement applications, including its own hosting platform Hopin Events, StreamYard for live streaming, Session for webinars and Streamable for videos.

The platform has been praised for its ease of use, scalability, and ability to replicate many of the benefits of in-person events, such as networking and engagement.

Zepz – $5 billion

Formerly WorldRemit Group, Zepz offers a range of services, including international transfers, currency exchange, and online payments.

Zepz has over 11 million users in 150 countries. The company’s platform allows businesses and individuals to send and receive payments in multiple currencies, with competitive exchange rates and low transaction fees. Zepz also offers a mobile app called WorldRemit that allows users to manage their accounts and make payments on the go. The app has been downloaded more than 5 million times.

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