Abnormal Security

Abnormal Security provides a behavioral AI security platform that protects email, identity, and AI security.

Latest funding

$250M Series B+ · August 6, 2024

Led by Wellington Management · Source: SecurityWeek

Latest round on record: Series B+, March 2026, amount undisclosed.

Total raised: $274M across 2 sourced rounds

All 4 rounds ↓

Website: abnormal.ai.

LinkedIn: linkedin.com.

Categories: Fintech Health and bio Cybersecurity.

Sectors: Artificial Intelligence (AI), Cyber Security, Email, Information Technology, Network Security.

Stage: Series B+.

Based in: Las Vegas, United States.

Founded: 2018.

Total raised: $274M in 2 sourced rounds.

Last round: Mar 6, 2026 · 254 days ago.

Headcount: 1001–5000 employees.

On Recent Funding since: Sep 29, 2026.

Signals

Website registeredNov 26, 2017 (9 years old)

About Abnormal Security

Its customers are organizations across various industries, including financial services, healthcare, manufacturing, retail, technology, public sector, and education. Abnormal Security sells its software platform to these organizations.

TIMELINE · MONEY RAISED

Abnormal Security | 705 days from website to first raise on record

Raised $274M in 2 sourced rounds·1 signal before the first raise

Money raised, round by round (amounts linked to their source). Pins are dated signals; hover the icons for dates.

Funding rounds

Date	Round	Amount	Lead	Source
Mar 6, 2026	Series B+	undisclosed	—	fundraisingfox.com
Dec 5, 2025	Series B+	undisclosed	—	fundraisingfox.com
Aug 6, 2024	Series B+	$250M	WWellington Management	SecurityWeek
Nov 1, 2019	Series A	$24M	GGreylock	startupintros.com

Timeline

November 26, 2017
Website created

Founders and team

ER
Evan Reiser founder

@evanreiser · source: abnormal.ai
SJ
Sanjay Jeyakumar Founder

@sanjays_tweets · LinkedIn
JR
Jeremy Riesenfeld Regional Sales Director Mid-Market - South
KM
Kevin Moore Chief Revenue Officer
KW
Kevin Wang VP Of Engineering
LB
Lisa Banks CFO
MB
Mike Britton Chief Information Security Officer
NR
Noah Rolff VP of Customer Success
SH
Stephen Harrison Vice President of Next-Gen Products

Investors

Companies like Abnormal Security

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Other companies backed by Wellington Management

MMueon$65M Series A · Oct 2026
MMMI$125M Series B+ · Oct 2026
TTabby$233M Series B+ · Sep 2026
CClay$115M Series B+ · Sep 2026
MMuon Space$250M Series B+ · Aug 2026
HHilo$19M Series B+ · Jul 2026

Wellington Management portfolio →

Sources and API

Every amount links to the page it came from. * Estimated from an accelerator's published standard deal, not a company-specific disclosure. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/abnormal-security (get a free API key).