Overview
Tessian provides cloud email security for enterprises using machine learning and behavioral data science to stop threats that bypass traditional filters. Its platform integrates with an organization's email and uses real-time threat detection and user coaching to defend against phishing, business email compromise, data loss, and insider threats. Unlike some competitors, Tessian emphasizes behavioral analysis and in-the-moment coaching to change user security habits in addition to filtering. The goal is to improve overall email security and foster a security-aware culture in large organizations through ongoing protection and education.
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Simplify's take
What believers are saying
- Proofpoint updated Adaptive Email DLP on October 16, 2026, showing active investment.
- Proofpoint’s 2025 Data Security Complete package expands Tessian’s reach across email, cloud, and endpoints.
- Open roles remain at Proofpoint in November 2026, signaling continued hiring around the platform.
What critics are saying
- Tessian’s standalone brand is retired, eliminating employer identity and product autonomy by 2026.
- Proofpoint cut 280 jobs in 2024 and shifted roles to Argentina and Ireland.
- Email-security commoditization from Microsoft and Abnormal AI pressures Proofpoint’s Tessian differentiation within 24 months.
What makes Tessian unique
- Tessian’s behavioral AI now powers Proofpoint Adaptive Email DLP and Adaptive Email Security.
- Its core edge is send-time protection using Microsoft 365 Graph and Outlook add-ins.
- Proofpoint bundled Tessian into a broader human-risk platform with DLP, insider risk, and DSPM.
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Funding
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