Tessian, founded in 2013 by Edward Bishop, Tim Sadler, and Tom Adams, is an AI-driven email security company that was acquired by Proofpoint in late 2023. Headquartered in London, United Kingdom, with offices in San Francisco and Boston, Tessian developed a platform that uses machine learning to protect businesses from email threats and data loss. The company's mission was to secure human-digital interactions within the enterprise and keep sensitive data and systems private.
Tessian's platform is designed to prevent advanced email threats, protect against data loss, and build smarter security cultures. Its technology analyzes email communication patterns to detect anomalies and potential security risks, such as phishing attacks, spear-phishing, and accidental sharing of sensitive information. Key products included Tessian Defender, which prevents inbound email attacks, and Tessian Enforcer, which protects against data exfiltration. Tim Sadler is the Co-Founder, Group Vice President & General Manager, Tessian Group. Proofpoint's acquisition of Tessian brings AI-powered defense layers to address risky user behaviors and enhance its threat and information protection platforms.
