YC Cybersecurity
51 Y Combinator companies tagged Cybersecurity, most in S26 (6).
Companies per batch
Companies
51 of 51 companies
DeepMarkF26 · AIA live watermark inside AI voice that survives phone calls
CautionS26 · AIHosting platform for software you can't afford to have hacked
FabraixS26 · AIThe world's frontier hacker of AI agents.
NebuSecS26 · AIAutonomous AI defense system for cyber attack
PalisadeS26 · AIAI that finds and fixes OS-level vulnerabilities across device fleets
TraceforceS26 · AICrowdStrike for AI Agents
TridentS26 · AIAutonomous offensive security agents. The best defense is offense
Agentic FabriqW26 · AIThe control plane for AI agents.
AntigenF25 · AIContinuous offensive security for the enterprise.
ComplyDoF25 · AIGlobal Compliance for Enterprises
LogosGuardF25 · AIThe sensitive data redaction layer for AI
Veria LabsF25 · AIContinuous AI pentesting that finds and fixes vulnerabilities
ContextFortS25 · AIVisibility and Controls for Browser Agents
GhostEyeS25 · AIYour always-on red team.
BitPatrolX25 · AcquiredAI-powered code security
CotoolX25 · AIAI Agents for Security Operations Teams
MindFortX25 · AIAutonomous Security Agents
ProboX25 · OtherWe help you get compliant while you focus on your business.
ArchonW25 · Developer toolsWe help software companies sell to government.
CandorW25 · AIProtect your data and stop insider risk
Gecko SecurityF24 · AIThe AI Security Engineer to Find and Fix Vulnerabilities
UnboundS24 · AIUse AI tools without fear of data leakage
ZeroPathS24 · AIAutomatically find and fix your software vulnerabilities
CodeAnt AIW24 · AIAutonomous offensive and defensive cybersecurity platform
PromptArmorW24 · AILLM Security and Compliance
TracecatW24 · AIOpen-source agentic security automation platform
CorgeaS23 · AICorgea finds, and fixes insecure code and packages autonomously.
MetalwareS23 · Developer toolsFirmware cybersecurity
XeolS23 · AcquiredClose your outdated dependency attack vector
Credal.aiW23 · AIThe Control Plane for Enterprise Agents
MatanoW23 · DataCloud Native SIEM (alternative to Splunk/Elastic)
VarianceW23 · AIAI Agents for Fraud Review and Investigations
OverwatchS22 · AIEnterprise software for enterprise risk and cyber fraud intelligence
Malloc IncS21 · AIAI-driven mobile cybersecurity
TarsalS21 · AcquiredData pipeline for your security data lake.
TelivyS21 · AcquiredAutomate your cyber security risk assessments
StacksiW21 · AcquiredAutomated Answers to Security Questionnaires
FormalS20 · OtherTake control of your data in real-time.
SafeBaseS20 · AcquiredTrust Center platform that scales customer security reviews
SkypherW20 · AIAI agent for Compliance Questionnaires Automation
TRM LabsS19 · AITRM is building a safer world for billions of people.FuzzbuzzW19 · AcquiredFuzzing as a Service
MedCryptW19 · AIMedCrypt gives medical device vendors cybersecurity features in a few…
Sublime BlackW19 · InactiveAutomating Cyber Security Incident Response Through Artificial…
Hunter2W18 · AcquiredHunter2 trains engineering teams in application security through…
MetapacketS16 · InactiveMetapacket is the first selective web gateway that stops malware by…
Salt SecurityW16 · AIProtects organizations from getting breached through their APIs.
CymmetriaS15 · AcquiredShifting the asymmetry of cyber security.
Traversal NetworksS15 · InactiveEnterprise Threat Detection: Tuning, Triage, and Analysis by Experts.
CyberFendW15 · AcquiredCyberfend delivers robust, real-time web and mobile security by…
ThinAirW15 · InactiveIntelligent data security for teamsNot affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.