Lemma
YC F25San Francisco, US · Founded 2025 · 2 employees · Hiring · 5 known investors
Find your way into Lemma
725 people in our graph share verified history with the Lemma team — schools, employers, funds. One of them is your warm intro.
Rustyunlockedknows Jerry Zhang · together at Techstars (overlapped)
×6knows the team · via Techstars
×2knows the team · via LogRocket
knows the team · via Neo
knows the team · via University of Southern California
knows the team · via Illinois Institute of Technology
Lemma provides production monitoring and observability for AI agents, surfacing failures, aggregating issues, and enabling quick resolution through integrated alerts and context-sharing tools.
AI & Machine LearningDeveloper ToolsEnterprise SoftwareArtificial IntelligenceAnalyticsInfrastructureMonitoringUnited States of AmericaAmerica / Canada
Founders & leadership· Y Combinator alumni (F25)
Lemma was founded in 2025 by Jerry Zhang and Cole Gawin.
JZ
Jerry Zhangin𝕏FounderJerry Zhang is a co-founder of Lemma, an AI agents reliability platform supported by Y Combinator's F25 cohort.
CG
Cole Gawinin𝕏FounderCole Gawin attended USC and is building intelligent systems technology at Lemma, a startup in the Y Combinator F25 batch.
Investors · 5
Funding
SEC filings, press & company announcements- Undisclosed amountSeedOct 2024
Index Ventures (lead), Greycroft, Homebrew
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Competitors · 4
by search overlap
Axiomatic_AI3 shared keywordsAxiomatic AI makes Lemma, an AI co-explorer for scientific and engineering work that helps users validate, derive, and analyze equations and reasoning across mathematics, physics, and engineering with reproducible Python-based modeling. It serves researchers and engineers, producing workspace artifacts such as Markdown notes, Python scripts, and Marimo notebooks.
Lume3 shared keywordsLume built software to automate customer data integration for engineering teams, using AI to discover schemas, map data, validate quality, and generate code automatically. The company has closed operations.
Thread AI3 shared keywordsThread AI provides AI orchestration infrastructure that enables organizations to deploy controlled and governed AI workflows and agents in regulated environments. The platform, Lemma, offers a workflow builder and composable infrastructure for safely operationalizing mission-critical AI processes with governance, control, and traceability guardrails.
Vellum3 shared keywordsVellum builds AI development tools and platforms for teams building AI applications. The company focuses on helping customers navigate the rapidly evolving AI landscape through products and expertise.
Companies competing with Lemma for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Frequently asked questions
- What does Lemma do?
- Lemma provides production monitoring and observability for AI agents, surfacing failures, aggregating issues, and enabling quick resolution through integrated alerts and context-sharing tools.
- Who founded Lemma?
- Lemma was founded by Jerry Zhang, Cole Gawin in 2025.
- Who are Lemma's investors?
- Lemma's investors include Vermilion Cliffs Ventures, Y Combinator, Greycroft, Homebrew, Index Ventures.
- Where is Lemma headquartered?
- Lemma is headquartered in San Francisco, US.