Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

YC Security

101 companies · 66 active · 50% AI · most in W22 (10)

Companies tagged Security

AIFire WalletFire Wallet is a privacy-first crypto wallet designed to just work,…YC F26San FranciscoStartup →AIConiferIntelligent decisions for critical AI operationsYC S26San FranciscoStartup →AIDecaworkTraining company-specific models that approve AI actions.YC S26San FranciscoStartup →AINebuSecAutonomous AI defense system for cyber attackYC S26San FranciscoStartup →AITraceforceCrowdStrike for AI AgentsYC S26San FranciscoStartup →AITridentAutonomous offensive security agents. The best defense is offenseYC S26San FranciscoStartup →AIVerdict MachineAI cybersecurity for financial institutions' digital assetsYC S26Tel Aviv-YafoStartup →AITolmoTolmo is the AI security platform that secures every layer of cloud…YC X26San FranciscoStartup →AILogosGuardThe sensitive data redaction layer for AIYC F25San FranciscoStartup →AIVeria LabsContinuous AI pentesting that finds and fixes vulnerabilitiesYC F25San FranciscoStartup →AIAlterPrivileged Access Management for AI AgentsYC S25New York CityStartup →AIPangolinOpen networking and security for your workforce, AI agents, and infraYC S25New York CityStartup →AITwentyTwoAI infrastructure for biosecurityYC S25New York CityStartup →AIAsymptote LabsAI detection & responseSPC 2025New YorkStartup →OtherPartyhatAll-in-one protection for your phoneSPC 2025San FranciscoStartup →Developer toolsBetter AuthThe authentication framework for TypeScriptYC X25San FranciscoStartup →AICotoolSecurity operations optimized for agents.YC X25San FranciscoStartup →AIGolfAgentic AI Security and GovernanceYC X25San FranciscoStartup →AITinfoilEncrypted AI with verifiable privacyYC X25San FranciscoStartup →AIGecko SecuritySecurity that understands your companyYC F24LondonStartup →AIClearly AIAutomate security and privacy reviewsYC S24SeattleStartup →AIwinfuncai-native security engineering for mission critical codebasesYC S24San FranciscoStartup →AIZeroPathAutomatically find and fix your software vulnerabilitiesYC S24San FranciscoStartup →AIPaziPlatform where autonomous companies are builtYC W24Startup →AIPromptArmorLLM Security and ComplianceYC W24San FranciscoStartup →AIRisottoRisotto auto-solves IT support requests using AIYC W24San FranciscoStartup →AISuperagentSecurity for AI-native developersYC W24San FranciscoStartup →AIInactiveTesseralThe open source platform for managing identity in business softwareYC W24San FranciscoStartup →AICorgeaCorgea finds, and fixes insecure code and packages autonomously.YC S23San FranciscoStartup →AIRimwardSolar farm security software for existing camerasYC S23ParisStartup →AIAcquiredXeolClose your outdated dependency attack vectorYC S23New York CityStartup →OtherAcquiredBreez SecurityIdentity threat detection in real timeSPC 2023New YorkStartup →AIMirage SecurityDefense against AI social engineeringSPC 2023San FranciscoStartup →AIInactiveBlyssEnd-to-end encrypted AI.YC W23San FranciscoStartup →Developer toolsAcquiredEdgeBitAutofix your software dependenciesYC W23San FranciscoStartup →AIEscapeOffensive security for the teams that are 100x outnumberedYC W23ParisStartup →AIInfisicalSecurity infrastructure for developers and agentsYC W23San FranciscoStartup →Developer toolsAccessOwlManaging your Employees' Access to SaaSYC S22BerlinStartup →AIOneleetYC's most popular security compliance platform (SOC 2, ISO 27001,…YC S22AmsterdamStartup →Developer toolsInactiveSlauth.ioThe IAM Policy CopilotYC S22Tel Aviv-YafoStartup →AIWolfiaWe help security, legal and sales teams answer customer questionsYC S22AustinStartup →AIDoppelDoppel uses generative AI and expert analysis to outsmart social engineering attacks. Their platform adapts in real-time to neutralize phishing, impersonation, and disinformation threats, keeping customers one step ahead.SPC 2022San FranciscoStartup →AIAgencyAgency replaces traditional security and compliance headcount with AI.YC W22New York CityStartup →OtherArgument Computer CorporationAccelerate verifiable computingYC W22BostonStartup →Developer toolsBunkyrZero-Knowledge security without seed phrases or backup codesYC W22DenverStartup →Developer toolsFirezoneEasiest way to set up Zero Trust Access for your teamYC W22San FranciscoStartup →DataAcquiredJumpWireDynamic access controls for all data and databasesYC W22New York CityStartup →OtherAcquiredOpteryOpt out software that removes your private info from the internetYC W22San FranciscoStartup →OtherPalitronica IncDetect cyber attacks on critical physical infrastructureYC W22KitchenerStartup →Developer toolsPrembly (formerly Identitypass)Identity Verification API for Emerging MarketsYC W22LagosStartup →AIReality DefenderEnterprise Deepfake DetectionYC W22New York CityStartup →AIStracData Discovery, DLP, DSPM for SaaS, Cloud, Gen AI & EndpointsYC W22SeattleStartup →Developer toolsCloudanixCloud and Container Security PlatformYC S21San FranciscoStartup →AIContraForceSecurity Delivery Platform to orchestrate AI agents for Service…YC S21McKinneyStartup →AIidemeumAI-powered Application ControlYC S21San FranciscoStartup →OtherAcquiredKeyriSecure fraud prevention and authentication platform for developersYC S21San FranciscoStartup →AIRootlyAI-native on-call and incident response carefully crafted to help…YC S21San FranciscoStartup →AIInactiveSquire.aiNever code alone.YC S21San FranciscoStartup →OtherAcquiredTelivyAutomate your cyber security risk assessmentsYC S21San FranciscoStartup →AIauthzedAuthorization Infrastructure securing AI at OpenAI, Zoom, & moreYC W21New York CityStartup →AICybleCyble - World’s First Intelligence-Driven, AI-Native Security…YC W21San FranciscoStartup →AIFeroot SecurityAI-powered Compliance Platform for PCI 4, CCPA, HIPAA, CIPA, 50+ lawsYC W21TorontoStartup →OtherInactiveObservaCatch accidental database exposures before the bad guysYC W21RemoteStartup →Developer toolsInactiveSlashAuthThe solution for fine-grained access control in web3YC W21San FranciscoStartup →AISwif.aiManage every device. Govern every AI agent.YC S20San FranciscoStartup →OtherAcquiredVectrixScan your SaaS apps and instantly identify security issuesYC S20San FranciscoStartup →OtherSocketStop software supply chain attacksSPC 2020San FranciscoStartup →OtherRiotCybersecurity awareness for fast growing companiesYC W20ParisStartup →AIInactiveVisual OneAI for security camerasYC W20San FranciscoStartup →Developer toolsInactiveLunaSecAn Open Source dependency security tool that is smarter than the restYC S19SeattleStartup →Developer toolsAcquiredDopplerSecure secrets. Prevent breaches. Keep teams moving.YC W19AustinStartup →OtherDyneti TechnologiesReduce payment fraudYC W19San FranciscoStartup →Developer toolsAcquiredFuzzbuzzFuzzing as a ServiceYC W19San FranciscoStartup →Developer toolsInactiveFederacyPenetration testing and bug bounty platform.YC S18San FranciscoStartup →OtherTall PoppyProtecting your employees against online harassmentYC S18OttawaStartup →OtherAcquiredGamma NetworksSecurity training that adapts to behaviorSPC 2018San FranciscoStartup →OtherAnjunaAnjuna enabled organizations to trust any infrastructureYC W18San FranciscoStartup →Developer toolsInactiveEnvKeyEnd-to-end encrypted configuration and secrets managementYC W18San FranciscoStartup →OtherQuantstampSecurity auditing for Web3YC W18San FranciscoStartup →Developer toolsAcquiredSqreenSqreen is the application security platform for the modern enterpriseYC W18San FranciscoStartup →AIVantaVanta, the proven leader in automated compliance helping startups…YC W18San FranciscoStartup →OtherAcquiredTemplarbitProtecting applications from malicious activityYC S17San FranciscoStartup →AIUpfortTurnkey security & hassle-free cyber insurance from leading insurersYC S17San FranciscoStartup →OtherMaterial SecurityMaterial Security offers a one-stop solution for keeping Google Workspace and Microsoft 365 safe, delivering easy-to-use email security, data governance, and posture management tools all in one platform.SPC 2017San FranciscoStartup →AIAmbient.aiAI company transforming enterprise physical security to prevent…YC W17San FranciscoStartup →OtherApozyApozy makes every website safe to browseYC W17San FranciscoStartup →OtherAmberBox Gunshot DetectionDetect Gunshots | Inform Law Enforcement | Empower First RespondersYC W16New York CityStartup →Developer toolsCastleBlock bots & bad behaviorYC W16San FranciscoStartup →OtherInactivePatchwork SecuritySecurity patch notifications for servers. Build it, deploy it, and…YC W16San FranciscoStartup →Developer toolsAcquiredAppcanaryAppcanary tracks the dependencies you use in your apps and servers…YC S15TorontoStartup →OtherAcquiredFinalA credit card that drastically reduces payment fraud and gives…YC W15San FranciscoStartup →DataInactiveRescue ForensicsActionable human trafficking intelligenceYC W15NashvilleStartup →OtherAcquiredSmyteSmyte stops bad actors on social networks and marketplaces.YC W15San FranciscoStartup →OtherInactiveBannermanSecurity Guard Company MarketplaceYC S14San FranciscoStartup →OtherAcquiredKuna SystemsWe're making a smart, front door camera with intercom that lets you…YC W14San FranciscoStartup →OtherAcquiredMeldiumSimple password & identity management for teams. Acquired by LogMeIn…YC W13San FranciscoStartup →Developer toolsMattermostSecure Collaboration for Technical TeamsYC S12San FranciscoStartup →Developer toolsAcquiredAuthyAuthy is a Two-Factor Authentication platform for developersYC W12San FranciscoStartup →Developer toolsInactiveDocuments.MeClient-side encryption for your devices and the cloud.YC W12San FranciscoStartup →OtherInactiveWireOverReally secure file sending for big files.YC W12BostonStartup →
Company
Fire WalletFire Wallet is a privacy-first crypto wallet designed to just work,…team of 3YC F26ActiveAI
ConiferIntelligent decisions for critical AI operationsteam of 4YC S26ActiveAI, Devtools
DecaworkTraining company-specific models that approve AI actions.2 programsteam of 2YC S26 +1ActiveAI, Devtools
NebuSecAutonomous AI defense system for cyber attackteam of 4YC S26ActiveAI
TraceforceCrowdStrike for AI Agentsteam of 2YC S26ActiveAI
TridentAutonomous offensive security agents. The best defense is offenseteam of 4YC S26ActiveAI
Verdict MachineAI cybersecurity for financial institutions' digital assetsteam of 4YC S26ActiveAI
TolmoTolmo is the AI security platform that secures every layer of cloud…team of 12YC X26ActiveAI, Devtools
LogosGuardThe sensitive data redaction layer for AIteam of 2YC F25ActiveAI
Veria LabsContinuous AI pentesting that finds and fixes vulnerabilitiesteam of 3YC F25ActiveAI
AlterPrivileged Access Management for AI Agentsteam of 2YC S25ActiveAI, Devtools
PangolinOpen networking and security for your workforce, AI agents, and infrateam of 3hiringYC S25ActiveAI, Devtools
TwentyTwoAI infrastructure for biosecurityteam of 3YC S25ActiveAI
Asymptote LabsAI detection & responseSPC 2025Not statedAI
PartyhatAll-in-one protection for your phoneSPC 2025Not statedOther
Better AuthThe authentication framework for TypeScriptteam of 4YC X25ActiveDevtools
CotoolSecurity operations optimized for agents.team of 8hiringYC X25ActiveAI
GolfAgentic AI Security and GovernanceYC X25ActiveAI, Devtools
TinfoilEncrypted AI with verifiable privacyteam of 5YC X25ActiveAI, Devtools
Gecko SecuritySecurity that understands your companyteam of 2YC F24ActiveAI
Clearly AIAutomate security and privacy reviewsteam of 17hiringYC S24ActiveAI
winfuncai-native security engineering for mission critical codebasesteam of 2YC S24ActiveAI
ZeroPathAutomatically find and fix your software vulnerabilitiesteam of 10YC S24ActiveAI, Devtools
PaziPlatform where autonomous companies are builtteam of 7YC W24ActiveAI, Devtools
PromptArmorLLM Security and CompliancehiringYC W24ActiveAI
RisottoRisotto auto-solves IT support requests using AIteam of 32 programsYC W24 +1ActiveAI
SuperagentSecurity for AI-native developersteam of 2YC W24ActiveAI, Devtools
TesseralThe open source platform for managing identity in business softwareteam of 5YC W24InactiveAI, Devtools
CorgeaCorgea finds, and fixes insecure code and packages autonomously.team of 6hiringYC S23ActiveAI, Devtools
RimwardSolar farm security software for existing camerashiringYC S23ActiveAI
XeolClose your outdated dependency attack vectoracquiredteam of 3YC S23AcquiredAI
Breez SecurityIdentity threat detection in real timeacquiredSPC 2023AcquiredOther
Mirage SecurityDefense against AI social engineeringSPC 2023Not statedAI
BlyssEnd-to-end encrypted AI.team of 2YC W23InactiveAI
EdgeBitAutofix your software dependenciesteam of 5acquiredYC W23AcquiredDevtools
EscapeOffensive security for the teams that are 100x outnumberedteam of 29hiringYC W23ActiveAI, Devtools
InfisicalSecurity infrastructure for developers and agentsteam of 70hiringYC W23ActiveAI, Devtools
AccessOwlManaging your Employees' Access to SaaSteam of 15YC S22ActiveDevtools
OneleetYC's most popular security compliance platform (SOC 2, ISO 27001,…team of 75hiringYC S22ActiveAI
Slauth.ioThe IAM Policy Copilotteam of 4YC S22InactiveDevtools
WolfiaWe help security, legal and sales teams answer customer questionsteam of 5YC S22ActiveAI
DoppelDoppel uses generative AI and expert analysis to outsmart social engineering attacks. Their platform adapts in real-time to neutralize phishing, impersonation, and disinformation threats, keeping customers one step ahead.SPC 2022Not statedAI
AgencyAgency replaces traditional security and compliance headcount with AI.team of 50hiringYC W22ActiveAI
Argument Computer CorporationAccelerate verifiable computingteam of 8YC W22ActiveOther
BunkyrZero-Knowledge security without seed phrases or backup codesteam of 3YC W22ActiveDevtools
FirezoneEasiest way to set up Zero Trust Access for your teamteam of 3YC W22ActiveDevtools
JumpWireDynamic access controls for all data and databasesacquiredteam of 2YC W22AcquiredData
OpteryOpt out software that removes your private info from the internetteam of 55acquiredYC W22AcquiredOther
Palitronica IncDetect cyber attacks on critical physical infrastructureteam of 6YC W22ActiveOther
Prembly (formerly Identitypass)Identity Verification API for Emerging Marketsteam of 80hiringYC W22ActiveDevtools
Reality DefenderEnterprise Deepfake Detectionteam of 542 programsYC W22 +1ActiveAI
StracData Discovery, DLP, DSPM for SaaS, Cloud, Gen AI & Endpointsteam of 8hiringYC W22ActiveAI
CloudanixCloud and Container Security Platformteam of 8YC S21ActiveDevtools
ContraForceSecurity Delivery Platform to orchestrate AI agents for Service…team of 15YC S21ActiveAI
idemeumAI-powered Application Controlteam of 10YC S21ActiveAI
KeyriSecure fraud prevention and authentication platform for developersteam of 5acquiredYC S21AcquiredOther
RootlyAI-native on-call and incident response carefully crafted to help…team of 75hiringYC S21ActiveAI, Devtools
Squire.aiNever code alone.team of 8YC S21InactiveAI, Devtools
TelivyAutomate your cyber security risk assessmentsteam of 6acquiredYC S21AcquiredOther
authzedAuthorization Infrastructure securing AI at OpenAI, Zoom, & moreteam of 31hiringYC W21ActiveAI, Data, Devtools
CybleCyble - World’s First Intelligence-Driven, AI-Native Security…team of 197hiringYC W21ActiveAI
Feroot SecurityAI-powered Compliance Platform for PCI 4, CCPA, HIPAA, CIPA, 50+ lawsteam of 24YC W21ActiveAI
ObservaCatch accidental database exposures before the bad guysYC W21InactiveOther
SlashAuthThe solution for fine-grained access control in web3team of 3YC W21InactiveDevtools
Swif.aiManage every device. Govern every AI agent.team of 20hiringYC S20ActiveAI
VectrixScan your SaaS apps and instantly identify security issuesteam of 7acquiredYC S20AcquiredOther
SocketStop software supply chain attacksSPC 2020Not statedOther
RiotCybersecurity awareness for fast growing companiesteam of 160hiringYC W20ActiveOther
Visual OneAI for security camerasteam of 4YC W20InactiveAI
LunaSecAn Open Source dependency security tool that is smarter than the restteam of 4YC S19InactiveDevtools
DopplerSecure secrets. Prevent breaches. Keep teams moving.team of 25acquiredYC W19AcquiredDevtools
Dyneti TechnologiesReduce payment fraudteam of 3hiringYC W19ActiveOther
FuzzbuzzFuzzing as a ServiceacquiredYC W19AcquiredDevtools
FederacyPenetration testing and bug bounty platform.team of 2YC S18InactiveDevtools
Tall PoppyProtecting your employees against online harassmentteam of 10YC S18ActiveOther
Gamma NetworksSecurity training that adapts to behavioracquiredon 9 Glyph sourcesSPC 2018AcquiredOther
AnjunaAnjuna enabled organizations to trust any infrastructureteam of 55YC W18ActiveOther
EnvKeyEnd-to-end encrypted configuration and secrets managementteam of 2YC W18InactiveDevtools
QuantstampSecurity auditing for Web3team of 80YC W18ActiveOther
SqreenSqreen is the application security platform for the modern enterpriseteam of 120YC top companyYC W18AcquiredDevtools
VantaVanta, the proven leader in automated compliance helping startups…team of 700led by SequoiaYC W18 +3ActiveAI
TemplarbitProtecting applications from malicious activityteam of 11acquiredYC S17AcquiredOther
UpfortTurnkey security & hassle-free cyber insurance from leading insurersteam of 38YC S17ActiveAI
Material SecurityMaterial Security offers a one-stop solution for keeping Google Workspace and Microsoft 365 safe, delivering easy-to-use email security, data governance, and posture management tools all in one platform.SPC 2017Not statedOther
Ambient.aiAI company transforming enterprise physical security to prevent…team of 150hiringYC W17ActiveAI
ApozyApozy makes every website safe to browseteam of 9YC W17ActiveOther
AmberBox Gunshot DetectionDetect Gunshots | Inform Law Enforcement | Empower First RespondersYC W16ActiveOther
CastleBlock bots & bad behaviorteam of 20hiringYC W16ActiveDevtools
Patchwork SecuritySecurity patch notifications for servers. Build it, deploy it, and…team of 2YC W16InactiveOther
AppcanaryAppcanary tracks the dependencies you use in your apps and servers…acquiredteam of 2YC S15AcquiredDevtools
FinalA credit card that drastically reduces payment fraud and gives…team of 11acquiredYC W15AcquiredOther
Rescue ForensicsActionable human trafficking intelligenceYC W15InactiveData
SmyteSmyte stops bad actors on social networks and marketplaces.team of 11acquiredYC W15AcquiredOther
BannermanSecurity Guard Company Marketplaceteam of 3YC S14InactiveOther
Kuna SystemsWe're making a smart, front door camera with intercom that lets you…team of 11acquiredYC W14AcquiredOther
MeldiumSimple password & identity management for teams. Acquired by LogMeIn…acquiredteam of 4YC W13AcquiredOther
MattermostSecure Collaboration for Technical Teamsteam of 120YC S12ActiveDevtools
AuthyAuthy is a Two-Factor Authentication platform for developersteam of 201acquiredYC W12AcquiredDevtools
Documents.MeClient-side encryption for your devices and the cloud.YC W12InactiveDevtools
WireOverReally secure file sending for big files.team of 2YC W12InactiveOther

About Security

Companies per batch

Security companies per YC batch
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Nearby spaces: Developer Tools 19, Cybersecurity 13, Compliance 12, Enterprise 10, DevSecOps 10, Open Source 9, Privacy 7, Crypto / Web3 5, Generative AI 4, API 3