Cohorts of 2021
Companies whose accelerator cohort started in 2021. 1,685 companies.
clusterB2B SaaS 183Consumer 168Fintech 155Healthcare and bio 126Commerce and marketplaces 111Developer tools 68Climate and energy 66Vertical AI agents 66Robotics and physical world 59Security and compliance 34Other 28Data for AI 24Horizontal AI assistants 17Defense and space 15Agent infrastructure 13AI infra and compute 7
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| Protego We help companies recover lost revenue from chargebacks | Security and compliancechargeback fraud prevention SaaS | Y CombinatorS21 | Inactive | checked 2026-08-23 |
| CoVerified Using infection data to keep organizations safe | Security and complianceinfection compliance verification | Y CombinatorW21 | Inactive | 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 |
| SlashAuth The solution for fine-grained access control in web3 | Security and complianceweb3 access control infrastructure | Y CombinatorW21 | Inactive | checked 2026-08-24 |