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Abnormal AI

AI-native email security platform protecting Fortune 500 from advanced phishing, BEC, and account takeover
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.
Enterprise 📍 San Francisco, CA Founded 2018
Current Valuation
$5.1B
as of 2024-Q3
UNICORN

QL Price

$5.1B
0% vs last round
QuantLogix's current estimate for Abnormal AI, published 2026-10-07 — in line with the last disclosed round of $5.1B (2024-Q3).
Confidence
low
Basis
round anchored
What backs this price
Last disclosed round $5.1B 2024-Q3 weight 0.25
How this price has held up
No round has priced for Abnormal AI since QuantLogix began publishing a price for it, so there is nothing to grade yet. The claim above is on the record from 2026-10-07 and will be graded against the next priced round. See the full accuracy record →
How to actually get exposure to Abnormal AI →
Which publicly-traded funds already hold it, what $10,000 buys, and whether any route is open to you.
Cite this price as QuantLogix QL Price, Abnormal AI, 2026-10-07 (4281da6d45636132). The id pins this exact claim, so a citation stays checkable after the price moves. Model estimate for research — not a quote, target price, or investment advice.

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 10/07/2026; 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.
How much has Abnormal AI raised?
Abnormal AI has raised $546M in total, most recently a Series D of $250M in Aug 2024.
Is Abnormal AI publicly traded — can you buy Abnormal AI stock?
No. Abnormal AI is a private company — its shares are not listed on any exchange and there is no ticker. The routes to exposure are pre-IPO secondary marketplaces and funds (accredited investors), employee tender offers when the company runs one, and public companies with read-through exposure. QuantLogix maps every route it can verify for Abnormal AI on its Pre-IPO Access Desk.
How to actually get exposure to Abnormal AI →
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.

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 2mo 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 2026-10-04. Re-checked weekly.

Talent Signal

Hiring trend
▶ Hiring steady
+9% vs 2026-08
Open roles
25
via careers page
Product-build share
68%
engineering, research, product, design
Trajectory
steady
heavy product build — 68% of open roles are product-building functions (engineering/research/product) — 14 of 25 open roles are security.
Actively hiring with no tracked executive churn.
Open roles by month
Open roles by month23Aug '2625Sep '26
Open roles by function
Open roles by functionSecurity14Support3Sales & GTM2Marketing1Data & ML1Finance & Strategy1Hardware1Ops & People1Design1
■ 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 2026-09-15; 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 SecurityEmailEnterprise
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.