Buildbox
Buildbox is a YC Fall 2026 (F26) company. Based in San Francisco, CA, USA. Team of 2.
About Buildbox
Summary
Buildbox benchmarks AI models on physical science problems, working with scientists to test how models reason, use specialized tools, and interpret experimental evidence. It targets researchers who need to judge where AI can contribute reliably and where its results require further scrutiny, replacing ad hoc, informal assessments of AI capability with structured, reproducible evaluations grounded in real research problems.
Go-to-market
Scientists and AI researchers are the primary collaborators and customers, reached through direct outreach and partnership rather than self-serve onboarding.
From the Y Combinator listing
Agent analytics for real user outcomes
Buildbox helps product teams improve the human-agent experience. We analyze user intent, agent behavior, and outcomes to find where users get stuck or lose trust, then turn those findings into ranked, reproducible issues.
Facts
- B2B / B2B -> Analytics
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (2)
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