90. Cisilion

Revenue: £46.2m (+59%)

Staff: 119

This London-based Cisco and Microsoft partner has "seen a real breakthrough" as its long-term strategy and investments begin to bear fruit, chairman Roger Paul said as he unveiled accounts for Cisilion's year to 31 May 2021. The collaboration, cloud, infrastructure and security specialist returned to profitability during the period as revenue rocketed 59 per cent to £46.2m (enough to thrust it back into Top VARs following a four-year hiatus). Public sector sales powered up 829 per cent.