Baserun
YC S23San Francisco, US Β· Founded 2023 Β· 2 employees Β· 1 known investors
Baserun provides testing and observability tools for LLM applications, helping teams monitor latency, costs, and output quality while debugging and evaluating model behavior.
Also known as baserun.ai Β· Mochi Labs
AI & Machine LearningDeveloper ToolsEnterprise SoftwareAIOpsArtificial IntelligenceB2BAIUnited States of AmericaAmerica / Canada
Founders & leadershipΒ· Y Combinator alumni (S23)
Baserun was founded in 2023 by Effy Zhang.
EZ
Effy ZhanginπCEO & Founder2023β2024Effy Zhang is founder of Baserun, which provides testing and observability tools for LLM applications.
Investors Β· 1
Funding
SEC filings, press & company announcements- Undisclosed amountpre-seedSep 2023Source β
Source: company announcements and press reports β follow each round's link for the claim.
In the news
Frequently asked questions
- What does Baserun do?
- Baserun provides testing and observability tools for LLM applications, helping teams monitor latency, costs, and output quality while debugging and evaluating model behavior.
- Who founded Baserun?
- Baserun was founded by Effy Zhang in 2023.
- Who are Baserun's investors?
- Baserun's investors include Y Combinator.
- Where is Baserun headquartered?
- Baserun is headquartered in San Francisco, US.

