Abnormal AI
AI-native email security platform protecting Fortune 500 from advanced phishing, BEC, and account takeover
Enterprise
📍 San Francisco, CA
Founded 2018
Current Valuation
$5.1B
as of 2024-Q3
UNICORN
Abnormal AI (rebranded from Abnormal Security in 2025) uses behavioral AI to detect socially-engineered email attacks that bypass legacy secure email gateways. Customers include 17% of the Fortune 500. Crossed $200M ARR in 2024. Raised $250M Series D at $5.1B in Aug 2024 led by Wellington with Greylock and Menlo. Co-founders Evan Reiser and Sanjay Jeyakumar previously sold TellApart to Twitter for $530M.
Company Profile
Est. Revenue
$200M (2024-Q4)
Last Round
Series D — $250M (Aug 2024) · Lead: Wellington Management
Founders & Key People
Evan ReiserSanjay Jeyakumar
Investors
Wellington Management · Greylock · Menlo Ventures · CrowdStrike Falcon Fund · Insight Partners · Insight Venture Partners
Products
- Inbound Email Security
- Account Takeover Protection
- Email-Like Account Takeover (Slack, Teams, Zoom)
- Security Posture Management
Competitors
Proofpoint · Mimecast · Microsoft Defender for O365 · Sublime Security · Material Security
SecurityAI SecurityEmailEnterpriseDecacorn
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2024-Q3. Refreshed quarterly.