33. Academia

Revenue: £114m (+34%)

Staff: 180

This edtech specialist saw revenues power up 34 per cent to hit £114m in its year to 30 June 2022 going by an announcement on its website in October (its accounts haven't yet formally been filed on Companies House). During the period, the Apple and Adobe specialist moved its HQ to Hemel Hempstead and increased its headcount from 140 to 180. Having taken on backing from channel entrepreneur Andrew Harman in 2020, Academia is eyeing M&A to power growth in 2023.