Abnormal Security: The Ad-Tech Founders Who Didn't Know What a "SOC" Was and Built an Email Security Giant Anyway
Abnormal Security was founded in 2018 by Evan Reiser and Sanjay Jeyakumar, veterans of TellApart, an ad-targeting startup Twitter bought in 2015. Leaving Twitter, they first imagined a broad AI platform, then asked security leaders what they would pay for within six months; the near-unanimous answer was email security. Applying the behavioral profiling used in advertising to detect impersonation attacks, they grew quickly, reached a $500 million valuation in a 2020 Series B led by Menlo Ventures
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