, United Kingdom Tessian Name Tessian Sectors Cybersecurity Total Capital Raised $49.31m Number of Employees 159 CEO Timothy Sadler Country United Kingdom Year of Foundation 2013 First Year in List No Website www.tessian.com Provider of a next-generation email security platform designed to detect and prevent inadvertent data loss. The company's email security platform uses machine intelligence to automatically prevent highly sensitive emails being sent to the wrong people with minimal end-user disruption, protecting enterprise email networks against data security threats such as misaddressed emails, data loss, and non-compliance. Source: pitchbook.com