Abnormal Ai

DATA-QUALITY NOTE: This profile (id 10009763) is a duplicate database entry for the same company as profile id 10005564 (Abnormal Security / Abnormal AI, abnormalai.com) — likely representing a different funding-round snapshot or a data-import artifact that used the abnormal.ai domain instead of abnormalai.com. Direct verification (HTTP fetch, Aug 2026) confirms abnormal.ai is the company's live, current official website (title: "Behavioral AI Email Security Platform | Abnormal AI"; footer copyright: "Abnormal AI, Inc."), while abnormalai.com now resolves to a GoDaddy "domain for sale" parked page (confirmed via curl: the site issues a client-side redirect to /lander, which itself returns a GoDaddy forsale.godaddy.com parking redirect). This strongly indicates the company has consolidated its brand onto the abnormal.ai domain (consistent with its April 2025 rebrand from 'Abnormal Security' to 'Abnormal AI') and no longer actively operates abnormalai.com, which appears to have lapsed or been allowed to expire. There is no evidence these are two different companies; all research below (founders, funding, investors, product, customers) describes the single entity that should be reconciled with profile 10005564 in the underlying database, ideally by merging/deduplicating the two rows rather than tracking them as separate portfolio companies.

Abnormal Security (now Abnormal AI) was founded in 2018 by Evan Reiser (CEO) and Sanjay Jeyakumar (CTO), two operators who had spent much of the 2010s building large-scale behavioral AI and machine-learning systems in the adtech industry. Jeyakumar was a founding engineer at TellApart, an e-commerce marketing/adtech company acquired by Twitter for over $500 million, where he later worked on search and Android; Reiser founded and ran AdStack from 2010-2013. Believing that the behavioral-AI techniques they had used to model consumer behavior at scale could be applied to detect the subtle, human-targeted attacks (phishing, business email compromise, account takeover) that traditional signature- and gateway-based security tools missed, they founded Abnormal Security in San Francisco in 2018 — initiated and incubated at Greylock's own offices — and emerged from stealth in November 2019 with a $24 million Series A led by Greylock Partners.

The company grew quickly by building an API-based, behavioral-AI email security product that integrated directly with Microsoft 365 and Google Workspace without requiring MX record changes, differentiating it from legacy secure email gateways. It raised a $50 million Series B in November 2020 (lead: Menlo Ventures, with Greylock participating), taking total funding to roughly $75 million. In 2022, the company closed a $210 million Series C at a $4 billion valuation (lead: Insight Partners, with Greylock Partners and Menlo Ventures participating) after tripling ARR and doubling headcount in the prior year, and it launched its next-generation Integrated Cloud Email Security (ICES) platform. CrowdStrike also made a strategic investment and launched a partnership with Abnormal in March 2023.

Business model

B2B SaaS; sells enterprise cybersecurity subscriptions (per-mailbox/per-seat licensing) primarily to mid-market and large enterprises, delivered via API integrations with Microsoft 365, Google Workspace, and other cloud/identity platforms.

Subscription-based ARR (annual recurring revenue) from enterprise security licenses.