TessianCybersecurity company profile

Email Securitysubsidiary
ByDecipherU Editorial
Version 1.0 · Published April 2026 · Last verified April 2026
DecipherU is not affiliated with, endorsed by, or sponsored by Tessian. Information is compiled from publicly available sources for educational purposes.

Tessian built machine learning models to prevent accidental data loss, phishing, and misdirected emails. The company was acquired by Proofpoint in 2023. Tessian technology is now integrated into Proofpoint's email security platform.

Company at a Glance

Headquarters

London, United Kingdom

Founded

2013

Employees

100-300

Ownership

subsidiary

Primary Focus

Machine learning-based email data loss prevention

Sales Org

No

Key Cybersecurity Products & Services

  • Tessian Defender (Phishing Prevention)
  • Tessian Guardian (Misdirected Email Prevention)
  • Tessian Enforcer (Data Exfiltration Prevention)

Cybersecurity Roles at Tessian

Careers at Tessian

View current openings at Tessian on their official careers page.

View Tessian careers page

Tessian built machine learning models to prevent accidental data loss, phishing, and misdirected emails. The company was acquired by Proofpoint in 2023. Tessian technology is now integrated into Proofpoint's email security platform.

Tessian typically hires for roles including Security Engineer, SOC Analyst, Incident Responder. Check their careers page for current openings.

Tessian is a subsidiary cybersecurity company headquartered in London, United Kingdom with 100-300 employees. They focus on Machine learning-based email data loss prevention. Research their official careers page and professional network presence for employee perspectives.

Last verified: April 2026?Report an inaccuracy

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