Tessian

Tessian built email security software centred on what it called human layer security. The company is now part of Proofpoint, whose website announces the combination and describes Tessian's AI as a strength in email protection.

What Tessian offers

• Phishing protection — machine learning that spots threats such as spear-phishing aimed at staff.
• Misdirected email prevention — warnings that stop messages going to the wrong recipient.
• Data exfiltration prevention — detection of attempts to move sensitive data out through email.
• Compliance monitoring — flags email activity that breaks policy.
• Proofpoint integration — its technology now sits within Proofpoint Core Email Protection API and Adaptive Email DLP.

Who it works with

The products were built for enterprises that want to protect people using email.

Key facts

• Offices (before the merger): San Francisco and London
• Now part of: Proofpoint
• Technique: stateful machine learning