Top accelerator startups

Startups14,448Programs29

14,448 startups · 29 programs

YC Cybersecurity

98 companies · 84 active · 58% AI · most in S26 (6)

Companies tagged Cybersecurity

AI0.securityThe autonomous cybersecurity teamYC F26San FranciscoStartup →AIArmorer LabsContinuous security verification for AI systems in regulated…YC F26San FranciscoStartup →AIDeepMarkA live watermark inside AI voice that survives phone callsYC F26San FranciscoStartup →AIOpenHackAlways-on AI security engineerYC F26San FranciscoStartup →AIRoutantLast mile deployment and connectivity for Agents as a ServiceYC F26San FranciscoStartup →AIStacktraceSee and control what your agents actually doYC F26San FranciscoStartup →AICautionHosting platform for software you can't afford to have hackedYC S26George TownStartup →AIFabraixThe world's frontier hacker of AI agents.YC S26San FranciscoStartup →AINebuSecAutonomous AI defense system for cyber attackYC S26San FranciscoStartup →AIPalisadeAI that finds and fixes OS-level vulnerabilities across device fleetsYC S26San FranciscoStartup →AITraceforceCrowdStrike for AI AgentsYC S26San FranciscoStartup →AITridentAutonomous offensive security agents. The best defense is offenseYC S26San FranciscoStartup →AICerberusCerberus is the world's first mathematically safe AI ethical hacker, the "Cursor for hacking" that makes security teams 10x more productive with AI that's provably guaranteed never to cause harm.500 Global Eurasia 10United StatesStartup →AIAgentic FabriqThe control plane for AI agents.YC W26San FranciscoStartup →AIAntigenContinuous offensive security for the enterprise.YC F25San FranciscoStartup →AIComplyDoGlobal Compliance for EnterprisesYC F25BerlinStartup →AILogosGuardThe sensitive data redaction layer for AIYC F25San FranciscoStartup →AIVeria LabsContinuous AI pentesting that finds and fixes vulnerabilitiesYC F25San FranciscoStartup →AIContextFortVisibility and Controls for Browser AgentsYC S25San FranciscoStartup →AIGhostEyeYour always-on red team.YC S25New York CityStartup →AIOblixHelping pentesters do 10x more security testing with autonomous offensive AI agents500 Global 2025United StatesStartup →Developer toolsSparkle AIStreamlining Product Security & Compliance500 Global 2025United StatesStartup →Developer toolsSparkle AIStreamlining Product Security & Compliance500 Global 2025United StatesStartup →AIStrongkeepCybersecurity for smaller businesses, made simple, affordable, and comprehensive.500 Global 2025SingaporeStartup →AIAcquiredBitPatrolAI-powered code securityYC X25New York CityStartup →AICotoolSecurity operations optimized for agents.YC X25San FranciscoStartup →AIMindFortAutonomous Security SwarmsYC X25Los AngelesStartup →OtherProboWe help you get compliant while you focus on your business.YC X25San FranciscoStartup →Developer toolsArchonWe help software companies sell to government.YC W25San FranciscoStartup →AICandorProtect your data and stop insider riskYC W25San FranciscoStartup →AIGecko SecuritySecurity that understands your companyYC F24LondonStartup →AIUnboundUse AI tools without fear of data leakageYC S24San FranciscoStartup →AIZeroPathAutomatically find and fix your software vulnerabilitiesYC S24San FranciscoStartup →AICodeAnt AIAutonomous offensive and defensive cybersecurity platformYC W24San FranciscoStartup →AIPromptArmorLLM Security and ComplianceYC W24San FranciscoStartup →AITracecatOpen-source agentic security automation platformYC W24New York CityStartup →AICorgeaCorgea finds, and fixes insecure code and packages autonomously.YC S23San FranciscoStartup →Developer toolsMetalwareFirmware cybersecurityYC S23San FranciscoStartup →AIAcquiredXeolClose your outdated dependency attack vectorYC S23New York CityStartup →Developer toolsBlindinsightDeveloper of a data insights platform designed for preserving privacy, security, and data sovereignty.500 Global 2023United StatesStartup →OtherHopaeStripe for Digital Identity.500 Global 2023South KoreaStartup →AICredal.aiThe Control Plane for Enterprise AgentsYC W23New York CityStartup →DataMatanoCloud Native SIEM (alternative to Splunk/Elastic)YC W23SeattleStartup →AIVarianceAI Agents for Fraud Review and InvestigationsYC W23San FranciscoStartup →AIOverwatchEnterprise software for enterprise risk and cyber fraud intelligenceYC S22New York CityStartup →OtherCicadaDeveloper of a bond trading platform intended to bring efficiency, transparency, and fairness to the financial systems.500 Global 2022MexicoStartup →OtherJMEMDeveloper of One time programmable Memory (OTP) technology, designed to provide high-security usage such as data storage and function activation.500 Global 2022TaiwanStartup →AIVerisoulDeveloper of a decentralized platform intended to help companies identify and prevent fake users like bots, duplicate accounts, and fraudsters.500 Global 2022United StatesStartup →AIMalloc IncAI-driven mobile cybersecurityYC S21NicosiaStartup →DataAcquiredTarsalData pipeline for your security data lake.YC S21New York CityStartup →OtherAcquiredTelivyAutomate your cyber security risk assessmentsYC S21San FranciscoStartup →OtherMammoth CyberDeveloper of agentless zero-trust access system intended to connect users with enterprise applications.500 Global 2021United StatesStartup →OtherAcquiredStacksiAutomated Answers to Security QuestionnairesYC W21Los AngelesStartup →OtherFormalTake control of your data in real-time.YC S20San FranciscoStartup →OtherAcquiredSafeBaseTrust Center platform that scales customer security reviewsYC S20San FranciscoStartup →OtherFakespotDeveloper of an online data authentication platform designed to prevent fake and misleading content from deceiving consumers.500 Global 2020United StatesStartup →Developer toolsIncognito TechnologiesProvider of information technology services intended for effective quality assurance in the field of system solutions.500 Global 2020IndiaStartup →AIPenfield.AIDeveloper of a cybersecurity platform designed to enhance security operations through process automation and performance optimization.500 Global GA 27CanadaStartup →AISkypherAI agent for Compliance Questionnaires AutomationYC W20New York CityStartup →AITRM LabsTRM is building a safer world for billions of people.YC S19San FranciscoStartup →Developer toolsKonduktoDeveloper of an application security testing platform intended to offer an automated and centralized vulnerability management process.500 Global 2019TurkeyStartup →AISeventh SenseDeveloper of an artificial intelligence(AI) based computer vision technology designed for the defense, security, surveillance, and retail markets.500 Global 2019SingaporeStartup →OtherShardsecureDeveloper of a data protection technology designed to securely store and share sensitive data in the cloud.500 Global 2019United StatesStartup →Developer toolsAcquiredFuzzbuzzFuzzing as a ServiceYC W19San FranciscoStartup →AIMedCryptMedCrypt gives medical device vendors cybersecurity features in a few…YC W19San DiegoStartup →AIInactiveSublime BlackAutomating Cyber Security Incident Response Through Artificial…YC W19Startup →Developer toolsAvataoDeveloper of an online training platform designed to teach secure software building using hands-on IT security exercises and tutorials.500 Global 2018HungaryStartup →Developer toolsTrustdockDeveloper of e-KYC and identity confirmation API software designed to facilitate trusted business relationships and transactions.500 Global 2018JapanStartup →Developer toolsAcquiredHunter2Hunter2 trains engineering teams in application security through…YC W18BostonStartup →Developer toolsAuthleteDeveloper of an OpenID-certified and Financial-Grade API-compliant tool designed to support identity assurance and grant management extensions.500 Global 2017JapanStartup →OtherGluwaGluwa is a builder of Gluwa, Creditcoin, and a stealth protocol.500 Global GA 19United StatesStartup →Developer toolsIdwallDeveloper of an identity verification platform designed to improve user authentication and fraudulent detection.500 Global 2017ChileStartup →Developer toolsOhaloDeveloper of an online data compliance platform designed to facilitate secured and automated data sharing across multiple networks.500 Global 2017United KingdomStartup →Developer toolsSmile IdentityDeveloper of an identity management platform designed to monitor customer records easily.500 Global GA 20NigeriaStartup →OtherInactiveMetapacketMetapacket is the first selective web gateway that stops malware by…YC S16San FranciscoStartup →AICapyDeveloper of online security software designed to protect websites against password brute-force attacks, spam and fraud.500 Global 2016United StatesStartup →OtherEfflux SystemsDeveloper of an automated cybersecurity platform designed to detect post-exploit threat actor behavior within enterprise networks.500 Global GA 17United StatesStartup →OtherWivityDeveloper of a governance and SaaS infrastructure designed for industry web3 collaborations.500 Global GA 17United StatesStartup →AISalt SecurityProtects organizations from getting breached through their APIs.YC W16New York CityStartup →OtherAcquiredCymmetriaShifting the asymmetry of cyber security.YC S15Tel Aviv-YafoStartup →AIInactiveTraversal NetworksEnterprise Threat Detection: Tuning, Triage, and Analysis by Experts.YC S15San FranciscoStartup →OtherNodal IndustriesDeveloper of network security devices.500 Global GA 13United StatesStartup →OtherNuveDeveloper of a sensor-based technology and a mobile application designed to prevent the theft of fuel and cargo.500 Global 2015United StatesStartup →AIAcquiredCyberFendCyberfend delivers robust, real-time web and mobile security by…YC W15San FranciscoStartup →OtherInactiveThinAirIntelligent data security for teamsYC W15San FranciscoStartup →OtherCobaltDeveloper of a pen testing as a service platform designed to transform the traditional broken test model into a data-driven vulnerability management engine.500 Global 2014United StatesStartup →OtherUpguardDeveloper of a third-party risk and attack surface management platform designed to reduce cyber risk, prevent breaches, and protect customer data.500 Global 2012United StatesStartup →Developer toolsWhoAPIProvider of domain data via the API.500 Global GA 5United StatesStartup →OtherSafe Shepherd, LLC.Provider of services for people to protect their privacy.500 Global GA 3United StatesStartup →Developer toolsTinfoil SecurityDeveloper of website and application programming interface (API) security software designed to make website and mobile security accessible to the world.500 Global GA 2United StatesStartup →AIk-IDIt’s not about telling kids what they can’t do – it’s about giving them the right tools to discover what they canspeedrun SR002SingaporeStartup →AIKairoContinuous security plane for the AI agent era, catching vulnerabilities before they ship.speedrun SR007San FranciscoStartup →AIKeythornInsurance for the AI Frontierspeedrun SR007San FranciscoStartup →AIPreManAgentic infrastructure that prevents your product from breaking when millions of AI agents use it.speedrun SR007San FranciscoStartup →AIQuagoQuago sees what others don’t. By analyzing sensor data and player connectivity, we detect in-game cheaters and expose fake players inflating UA campaigns.speedrun SR002Tel AvivStartup →AISafeWorldMaking robots safespeedrun SR006Palo AltoStartup →AISwitchfrogTurn every web product into an app for agentsspeedrun SR007San FranciscoStartup →AIZeroDriftZeroDrift enforces compliance in agent communications.speedrun SR006New YorkStartup →
Company
0.securityThe autonomous cybersecurity teamteam of 2YC F26ActiveAI, Devtools
Armorer LabsContinuous security verification for AI systems in regulated…team of 2YC F26ActiveAI, Devtools
DeepMarkA live watermark inside AI voice that survives phone callsteam of 5YC F26ActiveAI
OpenHackAlways-on AI security engineerYC F26ActiveAI, Devtools
RoutantLast mile deployment and connectivity for Agents as a ServiceYC F26ActiveAI, Devtools
StacktraceSee and control what your agents actually doteam of 3YC F26ActiveAI, Devtools
CautionHosting platform for software you can't afford to have hackedteam of 5YC S26ActiveAI, Devtools
FabraixThe world's frontier hacker of AI agents.team of 2YC S26ActiveAI
NebuSecAutonomous AI defense system for cyber attackteam of 4YC S26ActiveAI
PalisadeAI that finds and fixes OS-level vulnerabilities across device fleetsYC S26ActiveAI
TraceforceCrowdStrike for AI Agentsteam of 2YC S26ActiveAI
TridentAutonomous offensive security agents. The best defense is offenseteam of 4YC S26ActiveAI
CerberusCerberus is the world's first mathematically safe AI ethical hacker, the "Cursor for hacking" that makes security teams 10x more productive with AI that's provably guaranteed never to cause harm.500 Global Eurasia 10Not statedAI
Agentic FabriqThe control plane for AI agents.team of 2YC W26ActiveAI
AntigenContinuous offensive security for the enterprise.team of 5hiringYC F25ActiveAI, Devtools
ComplyDoGlobal Compliance for Enterprisesteam of 17hiringYC F25ActiveAI
LogosGuardThe sensitive data redaction layer for AIteam of 2YC F25ActiveAI
Veria LabsContinuous AI pentesting that finds and fixes vulnerabilitiesteam of 3YC F25ActiveAI
ContextFortVisibility and Controls for Browser Agentsteam of 2YC S25ActiveAI
GhostEyeYour always-on red team.team of 6hiringYC S25ActiveAI
OblixHelping pentesters do 10x more security testing with autonomous offensive AI agents500 Global 2025Not statedAI
Sparkle AIStreamlining Product Security & Compliance500 Global 2025Not statedDevtools
Sparkle AIStreamlining Product Security & Compliance500 Global 2025Not statedDevtools
StrongkeepCybersecurity for smaller businesses, made simple, affordable, and comprehensive.500 Global 2025Not statedAI
BitPatrolAI-powered code securityacquiredYC X25AcquiredAI, Devtools
CotoolSecurity operations optimized for agents.team of 8hiringYC X25ActiveAI
MindFortAutonomous Security Swarmsteam of 6hiringYC X25ActiveAI, Devtools
ProboWe help you get compliant while you focus on your business.team of 6YC X25ActiveOther
ArchonWe help software companies sell to government.team of 3hiringYC W25ActiveDevtools
CandorProtect your data and stop insider riskteam of 3hiringYC W25ActiveAI
Gecko SecuritySecurity that understands your companyteam of 2YC F24ActiveAI
UnboundUse AI tools without fear of data leakageteam of 7hiringYC S24ActiveAI, Data
ZeroPathAutomatically find and fix your software vulnerabilitiesteam of 10YC S24ActiveAI, Devtools
CodeAnt AIAutonomous offensive and defensive cybersecurity platformteam of 252 programsYC W24 +1ActiveAI, Devtools
PromptArmorLLM Security and CompliancehiringYC W24ActiveAI
TracecatOpen-source agentic security automation platformhiringYC W24ActiveAI, Devtools
CorgeaCorgea finds, and fixes insecure code and packages autonomously.team of 6hiringYC S23ActiveAI, Devtools
MetalwareFirmware cybersecurityteam of 4hiringYC S23ActiveDevtools
XeolClose your outdated dependency attack vectoracquiredteam of 3YC S23AcquiredAI
BlindinsightDeveloper of a data insights platform designed for preserving privacy, security, and data sovereignty.500 Global 2023Not statedDevtools
HopaeStripe for Digital Identity.500 Global 2023Not statedOther
Credal.aiThe Control Plane for Enterprise Agentsteam of 14hiringYC W23ActiveAI
MatanoCloud Native SIEM (alternative to Splunk/Elastic)team of 2YC W23ActiveData, Devtools
VarianceAI Agents for Fraud Review and Investigationsteam of 12hiringYC W23ActiveAI
OverwatchEnterprise software for enterprise risk and cyber fraud intelligenceteam of 14YC S22ActiveAI
CicadaDeveloper of a bond trading platform intended to bring efficiency, transparency, and fairness to the financial systems.500 Global 2022Not statedOther
JMEMDeveloper of One time programmable Memory (OTP) technology, designed to provide high-security usage such as data storage and function activation.500 Global 2022Not statedOther
VerisoulDeveloper of a decentralized platform intended to help companies identify and prevent fake users like bots, duplicate accounts, and fraudsters.500 Global 2022Not statedAI
Malloc IncAI-driven mobile cybersecurityteam of 10YC S21ActiveAI
TarsalData pipeline for your security data lake.team of 10acquiredYC S21AcquiredData
TelivyAutomate your cyber security risk assessmentsteam of 6acquiredYC S21AcquiredOther
Mammoth CyberDeveloper of agentless zero-trust access system intended to connect users with enterprise applications.500 Global 2021Not statedOther
StacksiAutomated Answers to Security Questionnairesacquiredteam of 4YC W21AcquiredOther
FormalTake control of your data in real-time.team of 10YC S20ActiveOther
SafeBaseTrust Center platform that scales customer security reviewsteam of 60acquiredYC S20AcquiredOther
FakespotDeveloper of an online data authentication platform designed to prevent fake and misleading content from deceiving consumers.500 Global 2020Not statedOther
Incognito TechnologiesProvider of information technology services intended for effective quality assurance in the field of system solutions.500 Global 2020Not statedDevtools
Penfield.AIDeveloper of a cybersecurity platform designed to enhance security operations through process automation and performance optimization.500 Global GA 27Not statedAI
SkypherAI agent for Compliance Questionnaires Automationteam of 12hiringYC W20ActiveAI
TRM LabsTRM is building a safer world for billions of people.team of 400hiringYC S19ActiveAI, Data
KonduktoDeveloper of an application security testing platform intended to offer an automated and centralized vulnerability management process.500 Global 2019Not statedDevtools
Seventh SenseDeveloper of an artificial intelligence(AI) based computer vision technology designed for the defense, security, surveillance, and retail markets.500 Global 2019Not statedAI
ShardsecureDeveloper of a data protection technology designed to securely store and share sensitive data in the cloud.500 Global 2019Not statedOther
FuzzbuzzFuzzing as a ServiceacquiredYC W19AcquiredDevtools
MedCryptMedCrypt gives medical device vendors cybersecurity features in a few…team of 16YC W19ActiveAI
Sublime BlackAutomating Cyber Security Incident Response Through Artificial…YC W19InactiveAI
AvataoDeveloper of an online training platform designed to teach secure software building using hands-on IT security exercises and tutorials.500 Global 2018Not statedDevtools
TrustdockDeveloper of e-KYC and identity confirmation API software designed to facilitate trusted business relationships and transactions.500 Global 2018Not statedDevtools
Hunter2Hunter2 trains engineering teams in application security through…acquiredYC W18AcquiredDevtools
AuthleteDeveloper of an OpenID-certified and Financial-Grade API-compliant tool designed to support identity assurance and grant management extensions.500 Global 2017Not statedDevtools
GluwaGluwa is a builder of Gluwa, Creditcoin, and a stealth protocol.500 Global GA 19Not statedOther
IdwallDeveloper of an identity verification platform designed to improve user authentication and fraudulent detection.500 Global 2017Not statedDevtools
OhaloDeveloper of an online data compliance platform designed to facilitate secured and automated data sharing across multiple networks.500 Global 2017Not statedDevtools
Smile IdentityDeveloper of an identity management platform designed to monitor customer records easily.500 Global GA 20Not statedDevtools
MetapacketMetapacket is the first selective web gateway that stops malware by…team of 2YC S16InactiveOther
CapyDeveloper of online security software designed to protect websites against password brute-force attacks, spam and fraud.500 Global 2016Not statedAI
Efflux SystemsDeveloper of an automated cybersecurity platform designed to detect post-exploit threat actor behavior within enterprise networks.500 Global GA 17Not statedOther
WivityDeveloper of a governance and SaaS infrastructure designed for industry web3 collaborations.500 Global GA 17Not statedOther
Salt SecurityProtects organizations from getting breached through their APIs.team of 200YC W16ActiveAI
CymmetriaShifting the asymmetry of cyber security.team of 11acquiredYC S15AcquiredOther
Traversal NetworksEnterprise Threat Detection: Tuning, Triage, and Analysis by Experts.YC S15InactiveAI
Nodal IndustriesDeveloper of network security devices.500 Global GA 13Not statedOther
NuveDeveloper of a sensor-based technology and a mobile application designed to prevent the theft of fuel and cargo.500 Global 2015Not statedOther
CyberFendCyberfend delivers robust, real-time web and mobile security by…acquiredteam of 2YC W15AcquiredAI
ThinAirIntelligent data security for teamsteam of 11YC W15InactiveOther
CobaltDeveloper of a pen testing as a service platform designed to transform the traditional broken test model into a data-driven vulnerability management engine.500 Global 2014Not statedOther
UpguardDeveloper of a third-party risk and attack surface management platform designed to reduce cyber risk, prevent breaches, and protect customer data.500 Global 2012Not statedOther
WhoAPIProvider of domain data via the API.500 Global GA 5Not statedDevtools
Safe Shepherd, LLC.Provider of services for people to protect their privacy.500 Global GA 3Not statedOther
Tinfoil SecurityDeveloper of website and application programming interface (API) security software designed to make website and mobile security accessible to the world.500 Global GA 2Not statedDevtools
k-IDIt’s not about telling kids what they can’t do – it’s about giving them the right tools to discover what they canspeedrun SR002Not statedAI
KairoContinuous security plane for the AI agent era, catching vulnerabilities before they ship.speedrun SR007Not statedAI, Data, Devtools
KeythornInsurance for the AI Frontierspeedrun SR007Not statedAI
PreManAgentic infrastructure that prevents your product from breaking when millions of AI agents use it.speedrun SR007Not statedAI, Devtools
QuagoQuago sees what others don’t. By analyzing sensor data and player connectivity, we detect in-game cheaters and expose fake players inflating UA campaigns.speedrun SR002Not statedAI
SafeWorldMaking robots safespeedrun SR006Not statedAI
SwitchfrogTurn every web product into an app for agentsspeedrun SR007Not statedAI
ZeroDriftZeroDrift enforces compliance in agent communications.speedrun SR006Not statedAI, Data

About Cybersecurity

Companies per batch

Cybersecurity companies per YC batch
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Nearby spaces: Developer Tools 16, Security 13, Enterprise 11, Compliance 8, DevSecOps 6, AI/Machine Learning 4, AI Infra 4, Open Source 3, Infrastructure 3, GovTech 3