Lemma

Lemma

Fall 2025

Continuous learning for AI agents

Artificial IntelligenceDeveloper ToolsB2BInfrastructureAI

About Company

Lemma enables AI agents to continuously improve from user feedback and production outcomes. Instead of relying on manual prompt tuning and reactive debugging, Lemma detects when an agent’s performance drifts, pinpoints the exact step causing failures, generates optimized prompt candidates, and automatically delivers improvements through our API or by opening a pull request in your codebase. Built by ex-AI engineers who felt this pain firsthand, Lemma turns static agents into self-improving systems, helping teams ship reliable AI products faster with compounding performance gains over time. Deploy 1x. Learn forever.

Active Founders

Jerry Zhang

Jerry Zhang

Founder

Co-founder / CEO @ Lemma (YC F25) | Continuous learning for AI agents

Cole Gawin

Cole Gawin

Founder

reimagining prompt engineering @ lemma (f25) | ex-USC

Company Facts

LocationSan Francisco, CA, USA
Team Size2
Founded2025
StatusActive