Lemma
San Francisco, United States
◆ Total Raised
$2.3M
◆ Stage
pre-seed
◆ Location
San Francisco, United States
◆ Founded
2025
◆ Team size
1-10
◆ Links
◆ About Lemma
AI agent reliability startup building monitoring infrastructure to detect silent failures in production AI agents.
◆ What sets it apart
Lemma focuses on catching silent, semantic agent failures and closing the loop from monitoring to automated prompt improvement, rather than just passive observability.
◆ Sectors
◆ Business
ModelSaaS
CustomerEngineering teams building and operating production AI agents and customer-facing AI features
◆ Notable
- Backed by Y Combinator's F25 batch
- Reported approximately $500K in disclosed pre-seed funding
- Publicly launched a production monitoring platform for AI agents
◆ Backing funds on Raise
- Vermilion Cliffs Ventures Fund IIpre-seed
- Y Combinatorpre-seed
◆ Funding rounds
7 Aug 2026
Led by Matrix, Y Combinator
With Liquid 2 Ventures, Vermilion Cliffs Ventures, Irregular Expressions, Cervin Ventures, Comma Capital, Position Ventures, Eight Capital
◆ Explore the market
◆ FAQ
What does Lemma do?
AI agent reliability startup building monitoring infrastructure to detect silent failures in production AI agents.
Where is Lemma based?
Lemma is based in San Francisco, United States, founded in 2025.
How much has Lemma raised?
Lemma has raised $2.3M in tracked funding and is currently at the pre-seed stage.
Who has invested in Lemma?
Investors in Lemma include Y Combinator.