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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

IPO Outlookrumored

Is Abnormal AI going public in 2026?
An IPO is rumored for 2026, with nothing filed. Abnormal AI remains private and the date is not the company's.
What is Abnormal AI's valuation in 2026?
Abnormal AI is valued at $5.1B as of 2024-Q3, set by its Series D ($250M, Aug 2024). That is the last confirmed mark, not a live price — private shares do not trade continuously.
Has Abnormal AI filed an S-1?
No public S-1 is on file for Abnormal AI as of 08/23/2026; the IPO is rumored.
Who are Abnormal AI's investors?
Abnormal AI's investors include Wellington Management, Greylock, Menlo Ventures, CrowdStrike Falcon Fund, Insight Partners, Insight Venture Partners.
Answers are derived from the roster record shown on this page — filing status, last round and confirmed marks. Where the record is silent, the answer says so rather than guessing.
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

CEO
Evan Reiser
Founded
2018
HQ
San Francisco, CA
Employees
~800
Total Raised
$546M
Est. Revenue
$200M (2024-Q4)
Growth
$200M+ ARR (2024)
Last Round
Series D — $250M (Aug 2024) · Lead: Wellington Management
IPO Status
rumored

Fundraising Status

Series D · $250M · 2y ago
rumoredTotal raised $546M

Latest Funding Round

RoundAmountDateLead InvestorPost-Money
Series D$250MAug 2024Wellington Management—

Vertical Intelligence — AI / ML

No verified Hugging Face organization found for Abnormal AI — no attributable open-model footprint. Closed-weights labs are common; this is a distribution signal, not a capability judgment.
Checked huggingface.co as of 2026-08-19. Re-checked weekly.

Talent Signal

Hiring trend
● First snapshot
trend accrues with monthly sweeps
Open roles
23
via careers page
Product-build share
70%
engineering, research, product, design
Trajectory
steady
heavy product build — 70% of open roles are product-building functions (engineering/research/product) — 14 of 23 open roles are security.
Actively hiring with no tracked executive churn.
Open roles by month
Open roles by month23Aug '26
Open roles by function
Open roles by functionSecurity14Support3Marketing1Data & ML1Finance & Strategy1Hardware1Ops & People1Sales & GTM1
■ product-building   ■ go-to-market / G&A
Behavioral Security Platform OverviewEmail SecurityInbound Email Security\\ \\ Stop phishing & malwareAI Security Mailbox\\ \\ Autonomous triage & responseMessaging Security\\ \\ Protect Slack, Teams & moreIdentity Threat Protection\\ \\ Stop identity threats
Counted from Abnormal AI's live job board as of 2026-08-17; role functions classified from posting titles. Open-role counts are an activity signal, not headcount. Refreshed monthly.

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.