CoArena
CoArena is a YC Summer 2026 (S26) company. Based in San Francisco, CA, USA. Team of 2.
About CoArena
Summary
CoArena builds a crowdsourced benchmarking arena for computer-use AI agents, serving AI labs that need honest, real-world evaluations of their models. Users pit two agents head-to-head on live tasks and judge which performs better, generating labeled comparison data that labs cannot produce through internal testing alone. The platform replaces hand-crafted, lab-controlled evals with blind human judgment at scale, publishing every result alongside the methodology that produced it.
Go-to-market
AI labs and model developers are the primary customers, reached through a public arena where any user can submit tasks and vote on agent performance, making the data network self-reinforcing as participation grows.
From the Y Combinator listing
The biggest crowdsourced benchmark for Computer-Use
CoArena is a live arena where anyone can use the world's top computer-use models racing two of them on the same real computer task and judging which one did it better. Every battle becomes something the AI labs can't build themselves, an honest test of their agents on real work, and the data to make them better.
Facts
- B2B / B2B -> Engineering, Product and Design
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (2)
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