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Automatically stop data breaches and security threats caused by employees on email. Powered by machine learning, Tessian detects anomalies in real-time, integrating seamlessly with your email environment within minutes and starting protection in a day. Provides you with unparalleled visibility into human security risks to remediate threats and ensure compliance.

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Email security powered by machine learning.


We Often Hear People Are The Weakest Link.

Firewalls protect your network. EDR protects your devices and endpoints. But what’s protecting your people? Your employees are now the gatekeepers to your organization’s most sensitive systems and data but today’s security strategies simply rely on people doing the right thing 100% of the time. 88% of data breaches are caused by human error.


Tessian Makes Them Your Strongest Asset.

By turning your email data into intelligence, Tessian’s machine learning technology transforms your most vulnerable endpoint - your employees - into a trusted security asset by taking human error out of the equation.

We Take a Unique Approach to Email Security.

We take a unique approach to securing people using email. Through a combination of machine intelligence, deep content inspection, stateful mapping of email relationships, and behavioral analysis, Tessian turns your email data into your biggest defense against security threats.

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Tessian’s infrastructure is built around a security-first platform architecture, allowing for real-time email analysis and detailed security threat insights.
  • Real Time Data Serving.
    Ultra-low latency data pipelines allow email checks in <1 second while traversing millions of data points across relationship graphs and external data sources.
  • Security & Privacy Framework.
    Security-first platform architecture with rigorous access controls to ensure data privacy and integrity.
  • Analytics.
    Intuitive dashboards and comprehensive reports provide visibility into security threats prevented, threat actors and important trends.

Human Layer Security Engine.

Tessian’s Human Layer Security Engine automatically prevents inbound and outbound email security threats impossible to detect with secure email gateways and legacy email security controls.

Machine Intelligence Framework

Tessian uses a blend of machine learning and heuristic models to automatically determine if emails contain security threats based on the Tessian Data Layer, Content X-Ray and Behavioural Analytics insights.

Tessian Data Layer

Tessian uses historical and real-time email data to map stateful relationship graphs for every organization and combines these with external data feeds, threat intelligence and cross-tenant insights to develop a comprehensive security and trust framework.

Content X-Ray

Tessian applies natural language processing and deep content inspection to all inbound and outbound emails to detect signals and anomalies that indicate security threats.

Behavioural Analysis

Tessian analyses user interactions, behaviours and security threat trends over time to determine the specific Human Layer Security characteristics and profile of every employee inside your organization.

Product & Analytics Integrations

Tessian provides extensive integration options for Exchange, O365 and G-Suite environments via Add-in, Gateway, and API deployments. It integrates seamlessly within minutes, learns within hours, and starts protecting in a day. It can also integrate with SIEM, SOAR, and other platforms for security teams to centralize and triage events.
Product Integrations
  • Add-in

    Prevent email security threats within Microsoft Outlook for Windows desktop devices.

  • Gateway

    Prevent email security threats within any email client on any device.

  • API

    Detect email security threats across O365 and G-Suite.

Analytics Integrations


Output Tessian analytics into SEIM, SOAR and other platforms.

See Tessian in action.

Organizations see a 2-7% churn rate after a data breach. It doesn’t have to be yours.