Lemma Raises $2.3M Pre-seed

Lemma, a San Francisco-based startup specializing in production monitoring infrastructure for AI agents, has raised $2.3 million in a pre-seed funding round. The company, which was part of the Y Combinator Fall 2025 batch, focuses on detecting silent failures in autonomous AI systems where agents perform tasks incorrectly despite appearing to succeed from a technical perspective.

Investors

The round included participation from Matrix, Y Combinator, Liquid 2 Ventures, Vermilion Cliffs Ventures, Irregular Expressions, Cervin Ventures, Comma Capital, Position Ventures, and Eight Capital, along with various angel investors and operators from OpenAI, xAI, Meta, and DoorDash.

Lemma Use of Funds

Lemma plans to use the new capital to support the further development of its monitoring and failure-detection tools, with an initial focus on supporting startups that are already running AI agents in production environments.

About Lemma

Founded by Jerry Zhang and Cole Gawin, Lemma provides production monitoring infrastructure for AI agents. Its platform captures structured traces of agent executions, including LLM calls, tool usage, inputs, outputs, retrieval steps, timing data, and errors. It analyzes these traces to identify recurring semantic failures, prioritize issues, alert.

Funding Details

Company Website: https://lemma.com

Company: Lemma
Raised: $2.3M
Round: Pre-seed
Funding Date: August 7, 2026
Investors: Matrix, Y Combinator, Liquid 2 Ventures, Vermilion Cliffs Ventures, Irregular Expressions, Cervin Ventures, Comma Capital, Position Ventures, Eight Capital
Company Website: https://www.lemma.com
Software Category: AI Observability
Source: https://www.unite.ai/lemma-raises-2-3m-pre-seed-to-tackle-silent-ai-agent-failures-in-production/