Tessian
Contact SalesAI email security that stops human-error threats for enterprises.
By Tanmay Verma, Founder · Last verified 15 May 2026
4.1k views
Added 4/3/2026
76/100Safe BetAI email security that stops human-error threats for enterprises.
By Tanmay Verma, Founder · Last verified 15 May 2026
Affiliate disclosure: We earn a commission when you use our links. Editorial picks are independent. How we choose.
Tessian fills a unique niche by focusing on human-caused email errors — a gap most security tools ignore. Its real-time coaching and behavioral analysis are standouts. Now owned by Proofpoint, its future is tied to Proofpoint's broader platform. For teams without enterprise budget or cloud email, look at alternatives like Mimecast or Proofpoint's own suite.
Compare with: Tessian vs Abnormal Security
Last verified: May 2026
Tessian is a specialized tool that addresses a specific pain point: human errors in email that lead to data breaches and phishing incidents. Its strengths lie in real-time employee coaching and behavioral analysis, which can reduce incidents over time. However, its narrow focus means it does not replace a full secure email gateway (SEG). With the acquisition by Proofpoint, Tessian's capabilities are being integrated into a larger platform, which may limit standalone development. Pricing remains unpublished and is typically enterprise-level, making it inaccessible for small businesses. For organizations already using Proofpoint, Tessian adds value as a complementary layer. For others, it requires evaluation against broader solutions like Mimecast or dedicated training platforms.
Skip Tessian if Skip Tessian if you are a small business without cloud email or if you need a complete secure email gateway replacement rather than a human-error focused add-on.
How likely is Tessian to still be operational in 12 months? Based on 6 signals including funding, development activity, and platform risk.
Tessian, now part of Proofpoint, uses machine learning to prevent email threats caused by human error — accidental data loss, misdirected emails, and phishing. It analyzes email patterns to detect anomalies and coaches employees in real time to prevent mistakes. The platform integrates with Microsoft 365 and Google Workspace and is tailored for large organizations with high email volume. Tessian focuses specifically on human-caused errors, complementing traditional secure email gateways rather than replacing them.
Concrete scenarios for the personas Tessian actually fits — and what changes day-one when you adopt it.
An employee accidentally emails a spreadsheet with customer PII to the wrong external domain.
Outcome: Tessian intercepts the email based on anomalous recipient patterns, triggers a real-time coaching dialog asking the employee to confirm, and prevents the data leak.
Deploy Tessian across Microsoft 365 to reduce phishing incidents.
Outcome: Within a week, Tessian's API integration scans all inbound/outbound emails, flags impersonation attempts, and blocks malicious links, reducing phishing reports by 40%.
Pricing is not publicly disclosed and typically requires contacting sales. Tessian focuses specifically on human-error email threats and does not replace a traditional secure email gateway. Integration is limited to Microsoft 365 and Google Workspace. The tool is now part of Proofpoint, so future development may prioritize Proofpoint's ecosystem.
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
For each published Tessian tier: who it actually fits, and what it adds vs. the previous tier. Cross-reference the cost calculator above for projected annual outlay.
Defender
Contact sales
Ideal for
Enterprise teams needing phishing and impersonation protection without full DLP.
What this tier adds
Starting tier focused on threat detection and real-time warnings, no data loss prevention features.
Guardian
Contact sales
Ideal for
Mid-sized companies requiring data loss prevention and employee coaching.
What this tier adds
Adds misdirected email prevention and coaching compared to Defender.
Complete
Contact sales
Ideal for
Large enterprises with compliance needs needing the full platform.
What this tier adds
Includes all features like custom policies and advanced analytics unavailable in lower tiers.
The company stage and team size where Tessian's pricing actually pencils out — and where peers do it cheaper.
Tessian's pricing is enterprise-level and not publicly listed, typically suiting organizations with large budgets. For smaller teams, Mimecast or Proofpoint's Essentials offer more transparent and affordable pricing. Tessian's value is in reducing human-error-related incidents, which can justify its cost for compliance-heavy industries.
How long it actually takes to get something useful out of Tessian — broken out by persona, not the marketing-page minute.
For IT admins, API integration with Microsoft 365 or Google Workspace takes a few hours to configure and train on existing email patterns. Employees receive coaching within days as the system learns their behavior.
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
Pricing, brand, ownership, or deprecation changes worth knowing before you commit. Most-recent first.
Common stack mates teams adopt alongside Tessian, with the specific reason each pairing earns its keep.
Used Tessian? Help shape our editorial sentiment research.
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