Antigen

YC F25 · Active · Continuous offensive security for the enterprise.

Competitors

Companies closest to Antigen
Company	Category	Status	Program
KairoShared: offensive testing, attack surface, cybersecurityNot statedAI, Data, Devtools	AI, Data, Devtools	Not stated	speedrunSR007
TridentShared: offensive security, cybersecurity, attackActiveAI	AI	Active	YCS26
EscapeShared: offensive security, directlyActiveAI, Devtools	AI, Devtools	Active	YCW23
MindFortShared: offensive security, cybersecurity, exploitActiveAI, Devtools	AI, Devtools	Active	YCX25
CodeAnt AIShared: cybersecurity, offensive, continuousActiveAI, Devtools	AI, Devtools	Active	YCW24

Adjacent

Companies next to Antigen
Company	Category	Status	Program
OblixShared: cybersecurity, offensive, testingNot statedAI	AI	Not stated	500 Global2025
UpguardShared: attack surface, cybersecurity, assessmentNot statedOther	Other	Not stated	500 Global2012
RAPIDFORTShared: attack surface, continuous, securityNot statedAI	AI	Not stated	Plug and Play
GhostEyeShared: cybersecurity, adversary, remediationActiveAI	AI	Active	YCS25
PromptArmorShared: cybersecurityActiveAI	AI	Active	YCW24

Also from F25 in AI

All of F25

Company	Category	Status
ComplyDoGlobal Compliance for EnterprisesActiveAI	AI	Active
LogosGuardThe sensitive data redaction layer for AIActiveAI	AI	Active
Veria LabsContinuous AI pentesting that finds and fixes vulnerabilitiesActiveAI	AI	Active
AbsurdThe Creative OS for AI videoActiveAI	AI	Active
AirCapsThe AI copilot for in-person conversations.ActiveAI	AI	Active
AlderAI employees for finance, starting with accounts receivable.ActiveAI	AI	Active

Founders

Saad JamalFounder/CTO
Abdullah NaumanFounder

About Antigen

Antigen is an AI adversary for the enterprise. It maps, exploits, and secures your attack surface through nightly automated offensive testing and monthly human red team assessments. Every finding is delivered with traces, reproduction steps, and remediation directly in GitHub, Linear, or the Antigen Platform. We work with companies in financial services, healthcare, retail, and government where security is trust. We're backed by Lightspeed, DST Global, and Susa Ventures.

YC batch: F25 · Fall 2025
Status, per YC: Active
Category: AI, Developer tools
Team size: 5
Location: San Francisco, CA, USA
Founded: 2026
Checked: 31m ago

YC tags: Artificial Intelligence, Cybersecurity

Antigen in F25: 146 companies, 89% AI

Antigen: questions

Which YC batch was Antigen in?

Antigen was in Y Combinator's Fall 2025 batch (F25).

Is Antigen still active?

Y Combinator lists Antigen as active.

Who founded Antigen?

Antigen's founders, as listed on its YC page: Saad Jamal (Founder/CTO), Abdullah Nauman (Founder).

Where is Antigen based?

Antigen lists San Francisco, CA, USA as its location on YC's directory.

Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.