Proofpoint Closes Acquisition of Tessian

SUNNYVALE, Calif., Dec. 19, 2023 (GLOBE NEWSWIRE) — Proofpoint, Inc., a leading cybersecurity and compliance company, today announced the completion of its acquisition of Tessian, a leader in the use of advanced AI to automatically detect and guard against both accidental data loss and evolving email threats.

Combining Proofpoint’s industry-leading threat and data loss protection technology and intelligence with Tessian’s AI-powered behavioral and dynamic detection will give organizations the most comprehensive defense available against the human layer risks with any deployment model they choose. Attacks targeted at people and human error remain behind over 90% of successful cyber-attacks, from ransomware to BEC, and over 90% of data loss, including the 65% of data loss incidents that result from misdirected email.

Unlike other solutions that rely either solely on threat intelligence or limit their detections to AI, our solution will be able to drive unparalleled effectiveness against the full range of human-targeted threats, from social engineering to malware to credential phishing. The combined platform will also enable organizations to prevent data loss across the most critical collaboration channels, from email to the cloud to the endpoint, leveraging an industry-first combination of user activity, behavioral AI, and data classification.

Proofpoint intends to bring these powerful joint solutions to market in early 2024.

“Tessian’s innovative technology will further enhance Proofpoint’s threat and information protection platforms by adding powerful layers of AI-powered defense that address risky user behaviors, including misdirected email and data exfiltration,” said Darren Lee, executive vice president and general manager of Proofpoint’s Security Products and Services Group. “We’re delighted to welcome the Tessian team to Proofpoint and look forward to helping organizations address the most frequent form of data loss at the most critical stages of the attack chain.”

“Email continues to be a key risk vector and core focus for many organizations” said Jerry Kowalski, chief information security officer, Jefferies. “We look forward to seeing how the combination of Tessian’s behavioral-based approach with Proofpoint’s industry-leading data will protect companies against the most advanced forms of email risk and data loss.”

Tessian was notably recently named a Strong Performer by Forrester Research, Inc. in The Forrester Wave™: Enterprise Email Security, Q2 2023 – The 15 Providers That Matter Most And How They Stack Up, receiving the highest scores possible in the Vision, Support, and Customer Success criteria.

To learn more about Proofpoint’s acquisition of Tessian, please visit:  

For more information on Proofpoint’s Aegis Threat Protection platform, please visit:

For more information on Proofpoint’s Sigma Information Protection platform, please visit:

About Proofpoint, Inc.
Proofpoint, Inc. is a leading cybersecurity and compliance company that protects organizations’ greatest assets and biggest risks: their people. With an integrated suite of cloud-based solutions, Proofpoint helps companies around the world stop targeted threats, safeguard their data, and make their users more resilient against cyber attacks. Leading organizations of all sizes, including 85 percent of the Fortune 100, rely on Proofpoint for people-centric security and compliance solutions that mitigate their most critical risks across email, the cloud, social media, and the web. More information is available at

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Proofpoint is a registered trademark or tradename of Proofpoint, Inc. in the U.S. and/or other countries. All other trademarks contained herein are the property of their respective owners.

Estelle Derouet
Proofpoint, Inc. 

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