Revenue: £123.1m (+51%)
Net profit: -33.9% Staff: 792
Microsoft's reigning UK Partner of the Year saw revenues smash though the £100m mark in its year to 31 July 2019 amid rising demand for its cloud migration services. An Azure, AWS and Google Cloud specialist, Cloudreach now boasts offices In London, Edinburgh, Amsterdam, Paris, Zurich, Berlin, Pune and across the US and Canada following an international expansion blitz. Hefty investment and integration costs incurred during the year saw net losses widen from £22.3m to £33.9m.