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Tessian is a next-generation email security platform that helps enterprises counteract human error and significantly reduce the risk of data loss. Tessian uses machine intelligence to analyse email networks and automatically prevent highly sensitive emails being sent to the wrong people with minimal end user disruption. Some of the world’s leading organisations across the legal, financial, professional services and technology sectors rely on Tessian as a critical component of their cybersecurity framework.


Amount raised

Named Lead Investor(s)

Balderton Capital

Useful links


Tim Sadler

Tim Sadler

Co-Founder & CEO Background:

Innovative Design and Mechanical Engineering.

Edward Bishop

Edward Bishop

Co-Founder & CTO Background:

Applicable Mathematics and Mechanical Engineering.

Thomas Adams

thomas adams

Co-Founder & COO Background:

Electrical and Electronic Engineering with Management.

HQ: London, UK

Founded 2014

21-50 employees

Business Model: Subscription

Target Market: Corporations, Law Firms