Lemma
YC F25 · Active · Production Monitoring for AI agents
Competitors
| Company | Category | Status | Program |
|---|---|---|---|
 RespanShared: surface issue, agent improve, monitoringActiveAI, Devtools | AI, Devtools | Active | YCW24 |
 RaindropShared: root cause, monitoring, silentActiveAI, Devtools | AI, Devtools | Active | YCW24 |
 SimulithicShared: production monitoring, miss, failureActiveAI, Devtools | AI, Devtools | Active | YCF26 |
 The Context CompanyShared: monitoring, analytics, productionActiveAI, Data, Devtools | AI, Data, Devtools | Active | YCF25 |
 TraceRoot.AIShared: root cause, infrastructure, productionActiveAI, Devtools | AI, Devtools | Active | YCS25 |
Adjacent
| Company | Category | Status | Program |
|---|---|---|---|
 SerialShared: root cause, analytics, productionInactiveData, Devtools | Data, Devtools | Inactive | YCW23 |
 Agnost AIShared: monitoring, analytics, agentActiveAI, Data, Devtools | AI, Data, Devtools | Active | YC +1S26 |
 Wild MooseShared: root cause, issue, beforeActiveAI, Devtools | AI, Devtools | Active | YCW23 |
 ExlaShared: infrastructure, digging, catchesActiveAI, Devtools | AI, Devtools | Active | YCW25 |
 BauplanShared: infrastructure, production, agentNot statedAI, Devtools | AI, Devtools | Not stated | SPC2022 |
Also from F25 in AI
All of F25| Company | Category | Status |
|---|---|---|
 Kestrel AIAI Agents for Platform EngineeringActiveAI, Devtools | AI, Devtools | Active |
 s2.devAPI for unlimited, durable, real-time streamsActiveAI, Data, Devtools | AI, Data, Devtools | Active |
 AmikaInfra to build your own software factoryActiveAI, Devtools | AI, Devtools | Active |
 Bolna AIVoice AI to enable India's next billionActiveAI, Devtools | AI, Devtools | Active |
 BronTikTok for Sports TradingActiveAI, Data | AI, Data | Active |
 CoastsLocalhost service isolation and orchestration for git worktreesInactiveAI, Devtools | AI, Devtools | Inactive |
Founders
- Jerry ZhangFounder/CEO
- Cole GawinFounder/CTO
About Lemma
Lemma catches the silent, semantic failures your observability tools miss, where your AI agent looks like it worked but didn’t. We scan every trace to surface issues before users complain, identify root causes, and help you fix them without manual digging, so your agents improve over time.
- YC batch
- F25 · Fall 2025
- Status, per YC
- Active
- Category
- AI, Data, Developer tools
- Team size
- 2
- Location
- San Francisco, CA, USA
- Founded
- 2025
- Checked
- 1h ago
YC tags: Artificial Intelligence, Developer Tools, Analytics, Infrastructure, Monitoring
Lemma: questions
Which YC batch was Lemma in?
Lemma was in Y Combinator's Fall 2025 batch (F25).
Is Lemma still active?
Y Combinator lists Lemma as active.
Who founded Lemma?
Lemma's founders, as listed on its YC page: Jerry Zhang (Founder/CEO), Cole Gawin (Founder/CTO).
Where is Lemma based?
Lemma lists San Francisco, CA, USA as its location on YC's directory.
Sources: each program's public company list, read twice a week. Not affiliated with Y Combinator or any other program. Logos via logo.dev; trademarks belong to their owners.