Top 25 publishers — United Kingdom

Britain's accounting and ERP giant for small and mid-sized businesses, listed on the London Stock Exchange for over 40 years.

Industrial software for engineering, operations and digital twins, delisted in 2023 to become a wholly owned Schneider Electric subsidiary.

AI-driven cybersecurity, spun out of the world of British intelligence.

One of the country's oldest endpoint and network security vendors, now owned by Thoma Bravo.

Business-management software for the mid-market, one of Britain's largest software vendors, backed by private-equity firms Hg and TA.

Accounting, payroll and school-management software for British practices and SMBs, owned by Leonard Green & Partners and Hg.

Formerly Advanced, a vendor of sector-specific business software for healthcare, legal and education, owned by BC Partners and Vista Equity Partners.

Software for local government, health and public services in the UK and Australia, bought by Blackstone from Partners Group in 2023.

The company behind Ubuntu, founded by Mark Shuttleworth, monetizing support and cloud tooling around the Linux distribution.

Governance, risk and compliance software for regulated industries — aviation, healthcare, finance.

Online identity and location verification, used by thousands of businesses worldwide.

Asset-finance and auto-leasing management platform used by banks and captives, listed on the London Stock Exchange since 2017.

Decision-intelligence platform that links data and entities for banks and governments, a London unicorn since 2023.

Developer-first security platform covering open-source dependencies, containers and code, born in London and now run from Boston.

Cloud-native core banking (Vault), founded by an ex-Googler and adopted by Lloyds, JPMorgan and Standard Chartered.

Payroll and HR for large UK and Irish employers, the former NGA UK business, sold by Bain Capital to Apax in 2024.

ERP for distributors, wholesalers and builders' merchants, active in around ten countries and backed by Accel-KKR.

Revenue-cycle and hospital-pharmacy software sold to US hospitals, strengthened by the 2021 Sentry acquisition, listed on London's AIM market.

AI-generated corporate video with synthetic avatars and voices, a London unicorn since 2023.

Data integration and transformation for cloud warehouses like Snowflake and Databricks, a Manchester unicorn since 2021.

Merchant of record for software companies, handling billing, sales tax and compliance on the vendor's behalf.

Ocado's software and robotics arm, licensed by grocery chains around the world.

Large-scale simulation technology spanning gaming and digital twins.

Computer vision for estimating car and property damage claims, used by major insurers.

AI voice synthesis and cloning, founded in London by two Polish entrepreneurs and a unicorn as early as 2024.