Lemma
About Lemma
Lemma is a San Francisco-based startup founded in 2025 and part of Y Combinator's F25 batch, backed by leading investors including Matrix and Liquid 2 as well as operators from OpenAI, xAI, and Doordash. The company builds production monitoring and reliability tooling specifically designed for AI agents, enabling companies to automatically improve their AI systems based on real-world production data. With a focused team of two, Lemma is addressing a critical gap in the AI infrastructure market by providing visibility and optimization capabilities for deployed AI agents.
Company at a glance
Culture & values
We look for people who act like founders - driven by the mission, biased toward action, and committed to craft.
Life at Lemma
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