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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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Human-First Security

We’re on a mission to secure the human layer in the modern workplace, by protecting all the digital interactions people need to do their jobs. We understand people’s behaviors on platforms like email to detect and prevent advanced threats, so that your people can focus on doing their best work in a secure, yet productive way.



Tessian’s Six Guiding Values.

We believe people are the most important decision makers in any organization. We’re a group of data scientists, engineers, designers, creative thinkers, and commercial experts who are passionate about protecting people processing data in the enterprise.
And we make sure that everyone who joins our team not only believes in our mission of securing the human layer, but also shares our values which define the way we work.
Our People

Tessian Founders

Our People

Tessian Executive Team

Our People

Tessian Board of Directors

Backed by world-class investors.

We’re backed by renowned investors Sequoia, Accel, March Capital and Balderton who have helped build many industry defining companies including Stripe, Slack, Crowdstrike, KnowBe4 and Dropbox.
Our Offices

Where to find us.

Tessian San Fransisco

535 Mission St, 14th Floor
San Francisco, CA 94105,
United States
+1 (857) 400-9844

Tessian Boston

14 Beacon Street, Suite 701
Boston, MA 02108
United States
+1 (857) 400-9844

Tessian Austin

11801 Domain Blvd, 3rd Floor
Austin, TX 78758
United States
+1 (857) 400-9844

Tessian London

15 Worship Street, 4th Floor
London, EC2A 2DT
United Kingdom
+44 (20) 8611 1066

Come Join Us
🚀 Want to join us on our journey?
We're on a mission to empower people to do their best work, without security getting in their way.