Revenue: £116.5m (+2%)
Net profit: 4.5% Staff: 523
One of five partners globally to hold top-level status with AWS, Azure and Google, this London-based managed services provider reported a two per cent UK revenue uplift in its year ended 30 June 2019, although net profits sank from £9.2m to £5.3m. Globally, Claranet is a £370m-revenue business with operations in France, Germany, Spain, Portugal and the Netherlands. It recently bolstered its overseas repertoire by acquiring Brazilian peer CredibiliT.