Tessian (Human Layer Security with Encryption)
Tessian was a human-layer email security vendor that used machine learning to stop data loss, BEC, phishing, and accidental disclosure in email workflows. In an Encryption & Key Management profile, it is best understood as a control that reduces the need to send sensitive data unprotected, rather than a full cryptographic key management system. It fit enterprises already using Microsoft 365 and seeking policy-based email protection with DLP-style controls and user coaching. Tessian was later folded into Proofpoint, so this profile reflects a product-line capability set rather than an independent encryption platform.
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The Picari read
Tessian protected Microsoft 365 email traffic by using machine learning to block accidental disclosure, BEC, and phishing at the point of send or receive. Its main value in this category was policy enforcement and user coaching around email-driven data loss, not standalone key management.
- Enterprises using Microsoft 365 that require policy-based email protection with DLP capabilities and user coaching to mitigate human-centric email security risks.
- Preventing accidental data loss via email
- Stopping sophisticated phishing and BEC attacks
- Mitigating insider threats through email analysis
- Enhancing employee security awareness through real-time nudges
Product catalogue
Tessian (Human Layer Security with Encryption) pricing and integrations
For Tessian (Human Layer Security with Encryption) integration and pricing details, ask Picari. Start a briefing with your question, such as whether it connects to your SIEM, identity provider and ticketing stack, or how it is priced at your seat count and data volume.
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Are you from Tessian (Human Layer Security with Encryption)? Verify this profileProfile last updated on 6 September 2026 by Picari.