Langfuse
YC W23 · Acquired · Open source LLM engineering platform
Competitors
| Company | Category | Status | Program |
|---|---|---|---|
 Agenta.aiShared: open source, llmNot statedAI | AI | Not stated | Antler2023 |
 LiteLLMShared: source llm, open sourceActiveAI, Devtools | AI, Devtools | Active | YCW23 |
 PareaShared: llm application, prompt, evaluationActiveAI, Devtools | AI, Devtools | Active | YCS23 |
 VocodeShared: open sourceAcquiredAI, Devtools | AI, Devtools | Acquired | YCW23 |
 SigNozShared: open source, trace, metricActiveDevtools | Devtools | Active | YCW21 |
Adjacent
| Company | Category | Status | Program |
|---|---|---|---|
 ElementaryShared: open source, analytics, observabilityActiveData, Devtools | Data, Devtools | Active | YCW22 |
 HyperDXShared: open source, trace, metricAcquiredDevtools | Devtools | Acquired | YCS22 |
 BricksAIShared: llm application, open source, metricInactiveAI, Devtools | AI, Devtools | Inactive | YCS22 |
 Confident AIShared: open source, llm, evalActiveAI, Devtools | AI, Devtools | Active | YCW25 |
 HumanloopShared: prompt management, llm, evalAcquiredAI, Devtools | AI, Devtools | Acquired | YCS20 |
Also from W23 in AI
All of W23| Company | Category | Status |
|---|---|---|
 HeliconeLLM Observability for DevelopersAcquiredAI, Data, Devtools | AI, Data, Devtools | Acquired |
 DAGWorks Inc.Open source tools & services for reliable AI Agents & AI ApplicationsAcquiredAI, Devtools | AI, Devtools | Acquired |
 FernInstantly offer SDKs and API DocsAcquiredAI, Devtools | AI, Devtools | Acquired |
 OpenIntOpen Source Embedded Product IntegrationsAcquiredAI, Data, Devtools | AI, Data, Devtools | Acquired |
 OuterbaseThe interface for your databaseAcquiredAI, Data, Devtools | AI, Data, Devtools | Acquired |
 ReflexThe operating system for building mission-critical enterprise apps.ActiveAI, Devtools | AI, Devtools | Active |
About Langfuse
Traces, evals, prompt management and metrics to debug and improve your LLM application. Onboard via https://langfuse.com Langfuse helps you build and improve LLM applications across the entire lifecycle: - Develop: Observability, Langfuse UI & Prompt Management - Monitor: Traces, Analytics, Metrics & Evaluations - Test: Experiments, Releases & Datasets We are hiring: https://langfuse.com/careers Langfuse was acquired by Clickhouse in January of 2026.
- YC batch
- W23 · Winter 2023
- Status, per YC
- Acquired
- Category
- AI, Data, Developer tools
- Team size
- 19
- Location
- Berlin, Berlin, Germany
- Checked
- 1h ago
YC tags: Developer Tools, Generative AI, Analytics, Open Source, AI
Langfuse: questions
Which YC batch was Langfuse in?
Langfuse was in Y Combinator's Winter 2023 batch (W23).
Is Langfuse still active?
Y Combinator lists Langfuse as acquired.
Where is Langfuse based?
Langfuse lists Berlin, Berlin, Germany 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.