82. Sapphire Systems

Revenue: £54.3m (+48%)

Staff: 403

M&A fuelled a 48 per cent calendar 2021 revenue hike at this London-based ERP specialist, which counts SAP, ServiceNow, Automation Anywhere, AWS, Infor and Hexagon as its six strategic vendors. With backing from Horizon Capital, Sapphire gobbled four companies during the year, including US-based Pioneer B1. International sales accounted for £20m of the £54.3m top line. It claims to have around 800 enterprise and 200 SMB customers.