Abnormal Security

Abnormal Security is a leading AI-based cloud-native email security platform that protects enterprises from targeted email attacks.

Abnormal provides a leading cloud-native email security platform that leverages AI-based behavioral data science to stop socially-engineered and never-seen-before email attacks that evade traditional secure email gateways (SEGs). 

Abnormal Security was founded in 2018 by Evan Reiser and Sanjay Jeyakumar. The company is headquartered in San Francisco, California.


Abnormal delivers a fundamentally different approach that precisely detects and protects against the widest range of attacks including business email compromise, phishing, malware, ransomware, social engineering, spam and graymail, supply chain compromise, and internal account compromise. 


The Abnormal platform delivers inbound email security, internal and external account takeover protection, and full SOC automation. Abnormal’s API-based approach enables customers to get started in minutes and can augment a SEG or be used standalone to enhance native cloud email security protection with Microsoft 365 and Google Workspace.


Abnormal protects more than 5% of the Fortune 1000 and numerous notable companies including Xerox, Hitachi Vantara, Urban Outfitters, Groupon, Royal Caribbean International and Auto Club Group-AAA.


Abnormal Security is backed by Insight Partners, Greylock Partners and Menlo Ventures. The company raised $210M in a Series C round on May 10, 2022. This brings Abnormal Security's total funding to $284M to date. The latest round mints Abnormal Security a unicorn with a valuation of $4B post-money.



  • Year founded: 2018
  • Funding Info: $284M over 3 Rounds (Latest Funding Type: Series C)
  • Yearly Revenue: NA
  • Employee Size: 201-500
  • Business Valuation: Valued at $4B as of May 10, 2022
  • City/Town: San Francisco
  • State: California
  • Country: United States
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