Request a Demo of Tessian Today.
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.

New Webinar: Check out how PeaceHealth maintains word class email security with a vast supply chain and 19k caregivers. Register Now →

Our mission is to secure the human layer.

Tessian automatically stops data breaches and security threats caused by human error – like data exfiltration, accidental data loss, and phishing attacks – with minimal disruption to employees’ workflow. That means employees are empowered to do their best work, without security getting in their 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.



Tessian Founders

Tessian Executive Team

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.

See Press and Awards →

Where to find us.

Tessian San Fransisco


535 Mission St, 14th Floor
San Francisco, CA 94105,
United States



Tessian Boston


200 Portland Street, 5th Floor
Boston, MA 02114
United States



Tessian Austin


11801 Domain Blvd, 3rd Floor
Austin, TX 78758
United States



Tessian London


3 Finsbury Ave, 3rd Floor
London, EC2M 2PA
United Kingdom



Come Join Us
🚀 Want to join us on our journey?