78. Orange Cyberdefense UK

Revenue: £55.1m (+33%)

Staff: 184

A lack of fresh accounts filed by the UK subsidiary of this Orange-owned cybersecurity solutions provider means we have had to recycle old calendar 2020 numbers in the headline of this profile. Globally, the reigning Palo Alto Networks' EMEA Service Provider of the Year employs 250 researchers and analysts and operates 17 SOCs. With offices in Maidstone, London and Manchester, the UK business is based on its 2019 acquisitions of SecureData and SecureLink.