Tessian

About Tessian

Tessian developed AI-powered email security technology focused on risks involving people, messages, and human behavior. Its systems were designed to detect and help prevent accidental data loss, such as sending sensitive information to the wrong recipient, as well as malicious email threats. The company applied machine learning and behavioral signals to identify circumstances that conventional rules or static filters can miss. Tessian’s technology analyzed email context and user behavior to identify suspicious or risky communication before information left an organization or a threat reached an employee. Its capabilities addressed misdirected email, phishing, business email compromise, and other human-layer security challenges. The approach aimed to provide organizations with contextual interventions and protection that could reduce the consequences of everyday mistakes and targeted attacks. Proofpoint completed its acquisition of Tessian in December 2023, incorporating Tessian’s AI capabilities into Proofpoint’s people-centric cybersecurity portfolio. Tessian is therefore best understood today as an acquired company and technology associated with Proofpoint rather than an independent standalone vendor. Its history remains relevant to AI email security, data loss prevention, human risk management, phishing defense, and behavioral cybersecurity technology.

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