Abnormal AI Funding History

Abnormal AI provides AI-based email and behavioral security software targeting business email compromise, account takeover and insider risk.

Company Overview

Cybersecurity

Founded 2018 · San Francisco, California, US

Official Website

Abnormal AI Funding Timeline

Aug 6, 2024
Series D
US$250 million · $5.1B valuation
Source · cooley.com ↗
May 10, 2022
Series C
US$210 million · $4B valuation
Led by Insight Partners. Participation included Greylock, Menlo Ventures.
Source · abnormal.ai ↗
Nov 18, 2020
Series B
US$50 million · $500M valuation
Led by Menlo Ventures. Participation included Greylock.
Source · abnormal.ai ↗
Nov 20, 2019
Series A
US$24 million
Led by Greylock.
Source · abnormal.ai ↗

Abnormal AI Founding Team

Evan Reiser
Co-founder and CEO of Abnormal AI; previously led product teams at Twitter and TellApart.
Status: activeReviewed: 2026-11-04
Sanjay Jeyakumar
Co-founder of Abnormal AI; previously an engineering leader at Google and Twitter.
Status: activeReviewed: 2026-11-04

Abnormal AI Products

Abnormal Email Security
Email security platform that detects social engineering and compromised accounts.
Official Website ↗
Details and Sources
Status: activeReviewed: 2026-11-05
Sources:abnormal.ai