Lighthouse is a cloud-based platform designed to help hotels manage pricing and revenue by consolidating market data into one place. It provides information on competitor rates, demand forecasts, and online travel agency (OTA) trends through a single dashboard. This can support hotel teams in monitoring market conditions and making informed decisions about their pricing and distribution strategies.
Overall the company has made five acquisitions. Most recently it acquired German hotel revenue management platform HQ Revenue, in June 2024. The company has been through seven funding rounds, and raised a total of £379m in equity.
Thought Machine is a fintech company that develops cloud-native core banking systems for banks and fintechs. Founded in Camden in 2014 by Paul Taylor, its flagship product, Vault Core, gives banks full programmable control over banking products — everything from savings accounts and loans to credit cards and mortgages — using a smart-contract-based engine and flexible configuration tools.
The company has been featured on a significant nine high-growth lists, including the FT1000 in 2024. In total it raised £393m over seven funding rounds.
Quantexa is an AI software company founded in 2016, aiming to solve big data silos with smarter insights. Their core product, the Decision Intelligence Platform, hooks up internal and external data sources, runs graph analytics and entity resolution, and creates a connected “network” view. That helps big businesses and government agencies spot fraud and assess risk.
The company has been through six funding rounds, securing a total of £421m — and it acquired Irish language processing company AYLIEN in 2023.
Dojo is a fintech company that provides card payment solutions and business tools to over 140k SMEs in the UK and Europe. Best known for its Dojo Go card machines with 4G, Wi‑Fi, and next-day payouts, it also offers services like bookings and customer queue management for hospitality.
Headquartered in Westminster with offices across the UK and Ireland, Dojo employs over 1,200 people.The company has been through a total of five funding rounds and altogether raised £471m. It has also featured on 14 high-growth lists.
Improbable is a technology company that builds large-scale virtual world and simulation platforms. Best known for its SpatialOS and metaverse infrastructure projects like MSquared and Somnia, it helps create interconnected, immersive online experiences for gaming, defense, and enterprise use.
The company now focuses on incubating new ventures in AI, blockchain, and the metaverse, aiming to launch multiple spin-offs each year. In total the company has been through seven funding rounds, raising £664m, and it has received four grants totalling £1.87m.
OneTrust is now based in Atlanta, after originally being launched in the City of London. It’s a software company that helps organisations manage privacy, security, and compliance. Its platform offers tools for consent management, data mapping, vendor risk, ESG reporting, and AI governance.
In 2016, OneTrust acquired Optanon, a software developer that created online cookie policies. Since then it has gone on to acquire three more companies: DataGuidance, Intergris Software, and Planetly. Overall the company has secured £699m in equity through four funding rounds.
Zepz (formerly WorldRemit) is a digital remittance and payments platform serving over nine million users across more than 130 countries via its brands WorldRemit and Sendwave.
Despite targeting full profitability and launching a digital wallet in 2025, Zepz underwent cost-cutting with layoffs.
Approximately 200 IT roles were cut (20% of its staff) in early 2025, and it closed some regional units to streamline operations post-replatforming and to boost efficiency.
The company has raised a total of £711m in equity across nine funding rounds, bringing it to number five on our list.
Starling Bank is a challenger bank founded in 2014 by Anne Boden. It offers a range of banking services, including personal and business current accounts, joint accounts, and Euro accounts, all accessible through its mobile app. The bank operates without physical branches, relying on its digital platform to serve customers.
The company has appeared on an impressive 15 high-growth lists, and attended two accelerator programs: the Future Fifty, and the Mayor’s International Business Programme. It has raised a total of £715m through nine equity funding rounds.
Checkout.com is a fintech company founded in 2012 by Guillaume Pousaz. It provides a global payments platform that enables businesses to accept, process, and disburse payments in over 150 currencies. The company offers a range of services, including a unified payments API, fraud detection, and local acquiring capabilities.
Since its incorporation in 2012, the company has acquired four companies. Most recently, it acquired French software company ubble, that made identity verification software for online transactions.
Checkout.com has appeared on nine high-growth lists, and attended two accelerator events. Overall the company has raised £1.36b, awarding it the bronze spot on our top SaaS companies list.
Originally founded in New Zealand, FNZ is a global wealth management platform provider founded by Adrian Durham. Now headquartered in London, FNZ offers an end-to-end technology solution that integrates investment front office, tax wrappers, and back office operations under a platform-as-a-service model.
In total FNZ has acquired 14 companies — most recently in 2024, when it acquired Luxembourg-based Ifsam, a software company for fund management. The company has been through just two funding rounds but has raised a huge £1.43b in equity.
