Cohorts of 2021
Companies whose accelerator cohort started in 2021. 1,685 companies.
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| Aer Compound compliance: the central hub for meeting SEC obligations | Security and complianceSEC compliance management platform | Y CombinatorS21 | Acquired | 2026-08-23 |
| Cloudanix Cloud and Container Security Platform | Security and compliancecloud infrastructure security platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| idemeumAI AI-powered Application Control | Security and complianceAI-powered application control | Y CombinatorS21 | Active | checked 2026-08-23 |
| Keyri Secure fraud prevention and authentication platform for developers | Security and complianceDevice fingerprinting and fraud prevention | Y CombinatorS21 | Acquired | checked 2026-08-17 |
| Kodex Easiest way for companies to process data requests from governments | Security and compliancegovernment data request compliance | Y CombinatorS21 | Active | checked 2026-08-23 |
| Malloc IncAI AI-driven mobile cybersecurity | Security and complianceMobile device threat detection | Y CombinatorS21 | Active | checked 2026-08-23 |
| MarqVisionAI IP operating software for brands and content companies | Security and complianceIP enforcement and brand protection | Y CombinatorS21 | Active | checked 2026-08-23 |
| Pactima Live video signing for real-time agreements | Security and complianceeSignature and document verification | Y CombinatorS21 | Acquired | checked 2026-08-23 |
| Protego We help companies recover lost revenue from chargebacks | Security and compliancechargeback fraud prevention SaaS | Y CombinatorS21 | Inactive | checked 2026-08-23 |
| Tarsal Data pipeline for your security data lake. | Security and complianceSecurity data pipeline infrastructure | Y CombinatorS21 | Acquired | 2026-08-23 |
| TelivyAI Automate your cyber security risk assessments | Security and complianceAI cyber risk assessment platform | Y CombinatorS21 | Acquired | 2026-08-23 |
| VerihubsAI AI-powered Deepfake Detection | Security and complianceAI deepfake detection and face verification | Y CombinatorS21 | Active | checked 2026-08-23 |
| Authologic Stripe for online identity verification | Security and complianceidentity verification orchestration | Y CombinatorW21 | Active | checked 2026-08-23 |
| CoVerified Using infection data to keep organizations safe | Security and complianceinfection compliance verification | Y CombinatorW21 | Inactive | checked 2026-08-23 |
| CybleAI Cyble - World’s First Intelligence-Driven, AI-Native Security… | Security and complianceAI-native cybersecurity threat detection | Y CombinatorW21 | Active | checked 2026-08-17 |
| DarrowAI Bring Justice to Light | Security and complianceAI legal case intelligence platform | Y CombinatorW21 | Active | checked 2026-08-23 |
| Feroot Security AI-powered Compliance Platform for PCI 4, CCPA, HIPAA, CIPA, 50+ laws | Security and complianceAI compliance automation platform | Y CombinatorW21 | Active | checked 2026-08-23 |
| Invoid Create identity verification workflows the way you want | Security and complianceKYC identity verification infrastructure | Y CombinatorW21 | Inactive | 2026-08-23 |
| Observa Catch accidental database exposures before the bad guys | Security and compliancedatabase exposure detection | Y CombinatorW21 | Inactive | checked 2026-08-17 |
| Reclaim Protocol Education, Employment, Loyalty verification. Global & Compliant. | Security and complianceIdentity verification and compliance | Y CombinatorW21 | Active | checked 2026-08-23 |
| SlashAuth The solution for fine-grained access control in web3 | Security and complianceweb3 access control infrastructure | Y CombinatorW21 | Inactive | checked 2026-08-24 |
| SpruceID SpruceID lets users control their data across the web. | Security and compliancedecentralized identity infrastructure | Y CombinatorW21 | Active | checked 2026-08-23 |
| StacksiAI Automated Answers to Security Questionnaires | Security and complianceSecurity questionnaire automation | Y CombinatorW21 | Acquired | checked 2026-08-17 |
| Version Story Compare Git for Lawyers — now within Claude | Security and complianceLegal document version control | Y CombinatorW21 | Active | checked 2026-08-23 |