Workers IO
Workers IO is a YC Fall 2026 (F26) company. Based in San Francisco, CA, USA. Team of 2.
About Workers IO
Summary
Workers IO builds simulation environments that verify mission-critical software by running systems across millions of interleavings, fault conditions, and timing variations to surface the exact scenarios that break correctness guarantees. It targets engineering teams where high availability is a hard requirement, replacing manual testing and ad-hoc fault injection with exhaustive, automated verification. The product does the work of finding edge cases that conventional test suites miss.
Go-to-market
Engineering teams at companies operating mission-critical infrastructure are the primary buyers, reached through developer-led adoption.
From the Y Combinator listing
Simulation Environments for Verifying Mission Critical Software
Workers IO verifies your entire system across millions of interleaving, faults, and timings to find the exact conditions that break the software properties you care about. Built for teams where 99.99% uptime is table-stakes.
Facts
- B2B / B2B -> Engineering, Product and Design
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (1)
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