Tech Track 100

This firm’s platform detects email-based security threats arising from human error, such as sensitive data being sent or lost by mistake, or unauthorised data transfer and “spear phishing” — all risks the company says have been on the rise since Covid-19 hit. Its software has learnt how to automatically identify threats by assessing more than a billion emails for customers including Rightmove, Arm and the British Medical Association. Founded in 2013 by Tim Sadler, 32, Tom Adams, 31, and Ed Bishop, 31, who met as engineering students at Imperial College, the firm made sales of £9m last year. It has raised $59m (£45m) to date from investors including Sequoia Capital, Balderton Capital and Accel.

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Company details
Year2020
Rank3
CompanyTessian
ActivityEmail security provider
LocationCentral London
Average 3 year sales growth237.59%
Latest sales £000s8,982
Staff138
Founded2013
Websitewww.tessian.com

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* supplied by company † annualised figure