Antigen
Sells an AI pentesting platform whose offensive agent, tCell, probes a customer's live attack surface, chains weaknesses into working exploits, opens pull requests with fixes and retests them, with a security researcher reviewing every report.
StageUndisclosed
Founded—
HeadquartersSan Francisco, USA
San Francisco, USAStatusPrivate
Product
Selected offerings — the AI products recorded here, not the vendor's full catalogue.
-
Antigen AI agent
Continuous AI pentesting: an offensive agent called tCell signs into and probes a customer's live systems, chains weaknesses into reproducible exploits, writes the fix as a pull request for engineers to review, and re-attempts the exploit to verify it; offered managed or self-hosted, sold by demo.
Similar products 37
No sourced competitor yet: no filing, vendor document or measured-market report read so far names a rival for this company, so none is asserted. The companies below are the closest by what their products do.
CP
Check Point Software TechnologiesPublicAntigen and Agentic Exposure Validation both list threat detection and response; both also serve buyers who need to use AI to attack our own systems first; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareE
ExpelUndisclosedAntigen and Ruxie AI both list threat detection and response; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareAW
Arctic WolfUndisclosedAntigen and Aurora Agentic SOC both list threat detection and response; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareRC
Red CanaryAcquiredAntigen and Zscaler MDR AI Agents both list threat detection and response; Antigen's scale not recorded; Red Canary is acquired, with no independent scale.2 of 2 capabilitiesShared product typeCompareH
HiddenLayerEarly-stageAntigen and HiddenLayer AI Attack Simulation both list threat detection and response; both also serve buyers who need to use AI to attack our own systems first; scale not recorded for either; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareH
HuntressUndisclosedAntigen and Huntress Platform (Athena Engine) both list threat detection and response; scale not recorded for either; ships application rather than the same layer.2 of 2 capabilitiesDifferent layerComparePA
Palo Alto NetworksPublicAntigen and Cortex Agentic Assistant both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareS
SentinelOnePublicAntigen and Purple AI both list threat detection and response; Antigen's scale not recorded.1 of 2 capabilitiesShared product typeCompareT
TorqLate-stageAntigen and Torq HyperAgents both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareAS
Abnormal SecurityLate-stageAntigen and Account Takeover Protection both list threat detection and response; Antigen's scale not recorded.1 of 2 capabilitiesShared product typeCompareC
CrowdStrikePublicAntigen and Charlotte AI both list threat detection and response; Antigen's scale not recorded; ships agent platform, application and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareVA
Vectra AILate-stageAntigen and Cloud Detection and Response for Microsoft 365 both list threat detection and response; Antigen's scale not recorded; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareZ
ZscalerPublicAntigen and AI Endpoint Security both list threat detection and response; Antigen's scale not recorded; ships API service, application and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareM
MicrosoftPublicAntigen and Security Alert Triage Agent both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareD
DarktraceLate-stageAntigen and Darktrace ActiveAI Security Platform both list threat detection and response; Antigen's scale not recorded; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareD
DoppelLate-stageAntigen and Doppel Phishing Triage both list threat detection and response; Antigen's scale not recorded; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareW
WizAcquiredAntigen and Wiz AI-SPM both list threat detection and response; Antigen's scale not recorded; Wiz is acquired, with no independent scale; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareA
AccenturePublicAntigen and Cyber.AI both list threat detection and response; Antigen's scale not recorded; ships agent platform, application and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareMF
Mind FoundryEarly-stageAntigen and Nightingale both list threat detection and response; scale not recorded for either; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareI
IBMPublicAntigen and IBM QRadar MDR both list threat detection and response; Antigen's scale not recorded; ships API service, agent platform and 4 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareV
VercelLate-stageAntigen and Vercel BotID both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareN
NiCEPublicAntigen and Xceed AI FRAML both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareF
FortinetPublicAntigen and FortiGuard AI-Powered Security Services both list threat detection and response; Antigen's scale not recorded; ships agent platform, application and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareA
AmazonPublicAntigen and AWS Continuum both list threat detection and response; both also serve buyers who need to use AI to attack our own systems first; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareH
HarnessLate-stageAntigen and Security Testing Agent both list threat detection and response; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareD
DelineaUndisclosedAntigen and Identity Threat Protection both list threat detection and response; scale not recorded for either; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareE
ElasticPublicAntigen and Elastic Security both list threat detection and response; Antigen's scale not recorded; ships agent platform, application and 3 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareS
SonarLate-stageAntigen and SonarQube Hunter Agent both serve buyers who need to use AI to attack our own systems first; Antigen's scale not recorded.Shared product typeCompareD
DatadogPublicAntigen and Bits Threat Hunting both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareRA
Resemble AIEarly-stageAntigen and Resemble Agent Detection both list threat detection and response; scale not recorded for either; ships API service and application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareO
OpenAILate-stageAntigen and Codex Security both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareEA
Enkrypt AIAcquiredAntigen and Enkrypt AI both serve buyers who need to use AI to attack our own systems first; Antigen's scale not recorded; Enkrypt AI is acquired, with no independent scale; ships API service rather than the same layer.Different layerCompareS
SplunkAcquiredAntigen and Splunk AI Assistant in Security both list threat detection and response; Antigen's scale not recorded; Splunk is acquired, with no independent scale; ships agent platform, application and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareP
ProlificUndisclosedAntigen and Protocol both list threat detection and response; scale not recorded for either; ships data service and infrastructure service rather than the same layer.1 of 2 capabilitiesDifferent layerCompareH
HoneywellPublicAntigen and Honeywell Cyber Proactive Defense both list threat detection and response; scale not recorded for either; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareC
CognitionLate-stageAntigen and Devin Security Swarm both list threat detection and response; Antigen's scale not recorded.1 of 2 capabilitiesShared product typeCompareJ
JFrogPublicAntigen and JFrog Agent Skills Registry both list threat detection and response; scale not recorded for either; ships developer tool, infrastructure service and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompare
Check Point Software TechnologiesPublicAntigen and Agentic Exposure Validation both list threat detection and response; both also serve buyers who need to use AI to attack our own systems first; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareEExpelUndisclosedAntigen and Ruxie AI both list threat detection and response; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareAWArctic WolfUndisclosedAntigen and Aurora Agentic SOC both list threat detection and response; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareRCRed CanaryAcquiredAntigen and Zscaler MDR AI Agents both list threat detection and response; Antigen's scale not recorded; Red Canary is acquired, with no independent scale.2 of 2 capabilitiesShared product typeCompareHHiddenLayerEarly-stageAntigen and HiddenLayer AI Attack Simulation both list threat detection and response; both also serve buyers who need to use AI to attack our own systems first; scale not recorded for either; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareHHuntressUndisclosedAntigen and Huntress Platform (Athena Engine) both list threat detection and response; scale not recorded for either; ships application rather than the same layer.2 of 2 capabilitiesDifferent layerComparePAPalo Alto NetworksPublicAntigen and Cortex Agentic Assistant both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareSSentinelOnePublicAntigen and Purple AI both list threat detection and response; Antigen's scale not recorded.1 of 2 capabilitiesShared product typeCompareTTorqLate-stageAntigen and Torq HyperAgents both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareASAbnormal SecurityLate-stageAntigen and Account Takeover Protection both list threat detection and response; Antigen's scale not recorded.1 of 2 capabilitiesShared product typeCompareCCrowdStrikePublicAntigen and Charlotte AI both list threat detection and response; Antigen's scale not recorded; ships agent platform, application and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareVAVectra AILate-stageAntigen and Cloud Detection and Response for Microsoft 365 both list threat detection and response; Antigen's scale not recorded; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareZZscalerPublicAntigen and AI Endpoint Security both list threat detection and response; Antigen's scale not recorded; ships API service, application and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareMMicrosoftPublicAntigen and Security Alert Triage Agent both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareDDarktraceLate-stageAntigen and Darktrace ActiveAI Security Platform both list threat detection and response; Antigen's scale not recorded; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareDDoppelLate-stageAntigen and Doppel Phishing Triage both list threat detection and response; Antigen's scale not recorded; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareWWizAcquiredAntigen and Wiz AI-SPM both list threat detection and response; Antigen's scale not recorded; Wiz is acquired, with no independent scale; ships platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAccenturePublicAntigen and Cyber.AI both list threat detection and response; Antigen's scale not recorded; ships agent platform, application and 1 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareMFMind FoundryEarly-stageAntigen and Nightingale both list threat detection and response; scale not recorded for either; ships application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareIIBMPublicAntigen and IBM QRadar MDR both list threat detection and response; Antigen's scale not recorded; ships API service, agent platform and 4 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareVVercelLate-stageAntigen and Vercel BotID both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareNNiCEPublicAntigen and Xceed AI FRAML both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareFFortinetPublicAntigen and FortiGuard AI-Powered Security Services both list threat detection and response; Antigen's scale not recorded; ships agent platform, application and 2 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareAAmazonPublicAntigen and AWS Continuum both list threat detection and response; both also serve buyers who need to use AI to attack our own systems first; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareHHarnessLate-stageAntigen and Security Testing Agent both list threat detection and response; scale not recorded for either.2 of 2 capabilitiesShared product typeCompareDDelineaUndisclosedAntigen and Identity Threat Protection both list threat detection and response; scale not recorded for either; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareEElasticPublicAntigen and Elastic Security both list threat detection and response; Antigen's scale not recorded; ships agent platform, application and 3 more rather than the same layer.2 of 2 capabilitiesDifferent layerCompareSSonarLate-stageAntigen and SonarQube Hunter Agent both serve buyers who need to use AI to attack our own systems first; Antigen's scale not recorded.Shared product typeCompareDDatadogPublicAntigen and Bits Threat Hunting both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareRAResemble AIEarly-stageAntigen and Resemble Agent Detection both list threat detection and response; scale not recorded for either; ships API service and application rather than the same layer.1 of 2 capabilitiesDifferent layerCompareOOpenAILate-stageAntigen and Codex Security both list threat detection and response; Antigen's scale not recorded.2 of 2 capabilitiesShared product typeCompareEAEnkrypt AIAcquiredAntigen and Enkrypt AI both serve buyers who need to use AI to attack our own systems first; Antigen's scale not recorded; Enkrypt AI is acquired, with no independent scale; ships API service rather than the same layer.Different layerCompareSSplunkAcquiredAntigen and Splunk AI Assistant in Security both list threat detection and response; Antigen's scale not recorded; Splunk is acquired, with no independent scale; ships agent platform, application and 2 more rather than the same layer.2 of 2 capabilitiesDifferent layerComparePProlificUndisclosedAntigen and Protocol both list threat detection and response; scale not recorded for either; ships data service and infrastructure service rather than the same layer.1 of 2 capabilitiesDifferent layerCompareHHoneywellPublicAntigen and Honeywell Cyber Proactive Defense both list threat detection and response; scale not recorded for either; ships application and platform rather than the same layer.1 of 2 capabilitiesDifferent layerCompareCCognitionLate-stageAntigen and Devin Security Swarm both list threat detection and response; Antigen's scale not recorded.1 of 2 capabilitiesShared product typeCompareJJFrogPublicAntigen and JFrog Agent Skills Registry both list threat detection and response; scale not recorded for either; ships developer tool, infrastructure service and 1 more rather than the same layer.1 of 2 capabilitiesDifferent layerCompareClosest alternatives are pairs a vendor page itself compares. Similar products are matched from what each product does; nothing in that group is asserted as a rivalry.
Sources
- Total funding
-
Pages read for this record state no funding amount. Read the home, enterprise, terms and privacy pages.
- Valuation
-
Pages read for this record state no valuation.
- Founded
-
Pages read for this record state no founding year. Read the home, enterprise, terms and privacy pages.
- Public listing
-
No listing on the pages read; treated as private.
- Description
-
Official documentation · 18 Oct 2026
Home page: "Antigen is the AI adversary that maps, exploits, and secures your entire attack surface."; privacy policy names "Claybird Inc., d/b/a Antigen".
Something wrong here? Send a correction — quote this company id: antigen.