Abnormal AI

Email security using behavioral AI to catch phishing, fraud, and account takeover.

Abnormal AI models normal communication behavior for every employee and vendor, then flags messages that deviate from it. This catches attacks with no traditional indicators, such as text-only business email compromise and supplier fraud, and it detects compromised internal accounts. It deploys via API to Microsoft 365 and Google Workspace.

Category: Social Engineering & Human Risk
Founded: 2018
Funding: $534M raised (Series D, 2024)
Website: https://www.abnormal.ai

Seen at Black Hat USA 2026 (Lobby Lounge sponsor).

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