Software-as-a-service has become the default way business software is bought and sold. Instead of buying a licence and installing it, companies subscribe to software hosted and maintained by someone else.
And the UK has built a substantial industry around it. The companies included in this ranking have raised £34.4b across 667 equity rounds, the largest total of any sector we have ranked.
In this ranking, we’ve used the Beauhurst platform to identify 100 UK-headquartered SaaS companies that meet our methodology, then ranked them by the total equity funding they have raised.
That distinction matters. This is not a list of the UK’s fastest-growing software startups. Instead, it provides a snapshot of the SaaS businesses that have attracted the most equity investment over their lifetimes.
UK SaaS companies: sector overview
A SaaS company develops software that performs a service or function, and delivers it to customers over the internet rather than as an installed product. The company continues to host, update and support the software, usually in exchange for a subscription or usage-based fee.
SaaS is a delivery model rather than an industry, which is why the companies in this ranking work across so many markets.
The companies analysed for this article broadly fall into three groups.
The first is financial infrastructure. These companies process payments, run banking platforms or manage wealth and investment operations for other financial institutions.
The second is AI-native software. These companies build products where the machine learning model is the service, in areas including voice, video, autonomous driving and document analysis.
The third is business software, sold either to a specific industry or to a specific function. These companies serve markets such as hospitality, construction, automotive retail and recruitment.
On the Beauhurst platform, 101 of the 103 companies analysed are classified as application software businesses. Data provision and analysis applies to 45, payment processing to 24 and banking to 17. Companies can operate across more than one classification.
There are 103 companies in this cohort, compared with 46 at the end of 2015. That is growth of 124% over a decade.
But this is a mature cohort rather than a growing one. No company in the ranking is at seed stage. Some 54 are established and 37 are at growth stage, with only four at venture. Fourteen were incorporated before 2010, and the oldest, Chemring, dates back to 1905.
That maturity shows in the accounts. BT reports turnover of £19.7b, Revolut £4.52b and Marex £2.70b, with Wise, Ocado Group and The Hut Group all above £1b.
Key findings
The SaaS companies included in the analysis have raised £34.4b across 667 equity rounds.
FNZ leads with £2.29b. The wealth management platform has raised from its existing institutional shareholders four times in two years, most recently taking $450m in September 2026 from La Caisse, CPP Investments, Generation Investment Management and Motive Partners.
It is followed by Wayve (£2.15b), the autonomous driving company, Ocado Group (£1.76b), Checkout.com (£1.36b) and Revolut (£1.27b).
Funding here is far less concentrated than in the other sectors we have ranked. FNZ accounts for just 6.7% of the total, the top five for 26% and the top 10 for 38%. In every other ranking in this series, a single company has taken a double-digit share.
Investment has also been sustained rather than spiked. The peak year is 2021, at £5.47b, but 2026 has already reached £4.13b by 22 September. Some 67% of the capital recorded here has arrived since 2020.
The geography is familiar. London is home to 69 of the 100 companies named, followed by the South East with 12 and the North West with six. The East of England accounts for five.
Other parts of the UK have a smaller presence. Wales is home to two companies, while the East Midlands, East Scotland and the North East have one apiece.
The investor base is more international than in earlier rankings. Accel has backed 26 rounds, ahead of Insight Partners with 25 and Balderton Capital with 24. By value, SoftBank Vision Fund leads at £2.91b, followed by Insight Partners and Tiger Global Management.
The stage data also records four exits and three companies marked as dead. The exits are Nutmeg, Onfido, Privitar and Railsr.
