Tes
Tes (formerly TSL Education and the Times Educational Supplement, founded 1910) runs a marketplace for teacher jobs and classroom resources. It also sells school staff-management and HR software, the Tes Institute teacher training and CPD courses, and Tes Magazine. Customers are schools, multi-academy trusts and individual teachers in the UK and internationally. Revenue comes from recruitment advertising, software subscriptions, training fees and content. It has AI features, such as AI-assisted job descriptions and candidate matching in Tes Staff Management, but it is an edtech company, not a pure AI company. It is private equity-backed. Tracxn lists Onex as acquirer in December 2021 and estimates revenue of £100M–£500M for FY2024. Headcount was about 2,500 in mid-2026.