Langfuse
🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23
Langfuse scores 7.9/10 (Strong) in Observability & Evals.
Language TypeScript License Custom (see repo) Stars 30.4k★ Type service Self-host Yes Repo langfuse/langfuse Homepage https://langfuse.com
Quality
Strong 7.9
Adoption 62
Activity 93
Maturity 97
Community 63
Capability 50
Show the math
Overall 7.9/10
value = 7.9/10
score = value
Adoption 6.6/10
value = 62.1/100
score = 1 + 9 * value / 100
Activity 9.3/10
value = 92.7/100
score = 1 + 9 * value / 100
Maturity 9.7/10
value = 96.6/100
score = 1 + 9 * value / 100
Community 6.7/10
value = 62.9/100
score = 1 + 9 * value / 100
Capability 5.5/10
value = 50/100
score = 1 + 9 * value / 100
Key metrics
30.4k★ GitHub stars
1k/90d Recent commits
15 devs/90d Recent contributors
3.1y Project age
active Last commit
Gotchas
No gotchas documented yet. Contribute one if you know a constraint we missed.
Labels
- No license
No OSS license
No recognized open-source license is declared; using it commercially is legally ambiguous.
- Self-hosted
Self-hosted
You deploy and operate it yourself; there is no hosted option here.
- Managed option
Managed option
Available as a hosted/managed service in addition to self-hosting.
tracing evals prompt-management self-hostable agents