Lemma builds production monitoring infrastructure for autonomous AI agents by capturing structured traces of agent executions, including LLM calls, tool usage, inputs and outputs, retrieval steps, timing data, and errors. Its platform analyzes those traces to identify recurring semantic failures, prioritize issues, and surface alerts. The company aims to detect silent failures where agents appear to succeed technically but produce incorrect outcomes. Lemma was founded by Jerry Zhang and Cole Gawin and participated in Y Combinator’s Fall 2025 cohort. It recently raised $2.3 million in a pre-seed round to accelerate development of its monitoring and failure-detection tools. Initially, Lemma plans to focus on supporting startups that are already running AI agents in production.

Total raised

$2M

Funding rounds

1

Latest round

Seed

Latest activity

Aug 2026