UK SaaS Company Database
There is no register of UK SaaS companies. Companies House records a company’s SIC code, and the software codes lump subscription platforms in with agencies and one-off software projects. Nothing distinguishes a business selling seats per month from a consultancy writing bespoke code.
So the honest version of a UK SaaS database starts with the companies whose numbers are published and audited. Everything below comes from a results announcement, with the period it covers.
UK software companies with filed revenue
| Company | HQ | Latest reported period | Revenue | Recurring revenue disclosed |
|---|---|---|---|---|
| Sage Group | Newcastle | Year to 30 Sep 2025 | £2,513m, up 10% | ARR £2,574m, up 11% |
| Kainos | Belfast | Year to 31 Mar 2026 | £431.1m, up 17% | Workday Products ARR £89.0m, up 23% |
| GBG | Chester | Year to 31 Mar 2026 | £285.0m, up 3.2% at constant currency | Not disclosed as ARR |
| Bytes Technology | Leatherhead | Year to 28 Feb 2026 | £220.5m, up 1.6% | Gross invoiced income £2,341m, up 11.5% |
| Alfa Financial Software | London | Year to 31 Dec 2025 | £126.7m, up 15% | Not disclosed as ARR |
| Cerillion | London | Year to 30 Sep 2025 | £45.4m, up 4% | Not disclosed as ARR |
| Craneware | Edinburgh | Half year to 31 Dec 2025 | $105.7m, up 6% | ARR $184.2m, up 4% |
Two things in that table are worth pausing on.
Bytes is not a SaaS company. It resells Microsoft and other vendors’ licences, which is why its gross invoiced income of £2,341m is more than ten times its recognised revenue of £220.5m. It appears on plenty of UK SaaS lists. It should not.
The centre of gravity is not London. Of the seven, the two largest by revenue are in Newcastle and Belfast. Craneware is in Edinburgh, GBG in Chester. Only Alfa and Cerillion are London companies.
ARR is a marketing number, not an accounting one
Annualised recurring revenue has no definition in accounting standards. Nobody audits it. Each company decides what counts.
Look at how differently it is used above. Sage reports a single underlying ARR figure covering the whole group. Kainos reports ARR only for its Workday Products division, £89.0m against total revenue of £431.1m. GBG, Alfa and Cerillion do not report ARR at all.
That makes cross-company ARR comparison close to worthless. Revenue in the audited accounts is the only line that means the same thing at every company.
Craneware shows why the distinction bites. It reported ARR up 4% at the half year, then told the market in its FY26 trading update that full-year revenue would be $205m to $208m, broadly flat on FY25 and below expectations, because of the timing of eligible activity and deferred enterprise contracts. Recurring revenue growth and reported revenue growth are not the same thing.
The private companies
Most of the fast-growing UK software businesses do not file the kind of numbers above. What they disclose is a funding round and sometimes a valuation, both of which are point-in-time marks rather than trading performance.
Those are tracked separately on the British startup valuation tracker, which carries the date and the source of each mark. The London tech company profiles page covers how to pull a private company’s filed accounts from Companies House.
What was removed from this page
The previous version presented a product that did not exist, alongside figures with no published source:
- “2,500+ active SaaS companies”, “£12.8bn total market value”, “340,000+ jobs created”. No body counts UK SaaS companies, so none of these can be checked.
- A forecast that the UK SaaS market would reach £15.2bn by 2025, attributed to in-house research. The date has passed and no such research was ever published.
- Sage, Zoopla and Funding Circle named as the UK’s leading SaaS companies. Sage belongs there. Zoopla is a property portal and Funding Circle is a lender. Neither sells software on subscription.
- Bullhorn named as a UK enterprise SaaS company. It is headquartered in Boston.
- “Comprehensive profiles”, “funding intelligence”, “advanced search” and a combined valuation figure for a database that was never built.
- Research attributed to a named head of analytics who did not exist.
Frequently asked questions
How many SaaS companies are there in the UK?
Nobody knows, and nobody publishes a defensible figure. Companies House SIC codes do not separate subscription software from software services, and private data providers each apply their own definition. Any specific count you see is an estimate presented as a fact.
What is the largest UK SaaS company?
Sage Group, by a wide margin. It reported revenue of £2,513m and ARR of £2,574m for the year to 30 September 2025, with cloud native revenue of £885m growing 23%.
Where can I check a UK software company’s revenue for free?
For listed companies, the results announcement on the company’s investor relations page or through the London Stock Exchange RNS service. For private companies, filed accounts on the Companies House register, which are free and usually run about nine months behind the year end.
Is ARR a reliable comparison between companies?
No. ARR is unaudited and each company defines it differently, including which contracts count and how annualisation is calculated. Compare audited revenue instead, and treat ARR as the company’s own commentary on its subscription base.