Open-source LLM observability, tracing and evals.
Evals & observabilityopen-source
Langfuse vs Helicone
Verdict: in our “Best agent tracing & evals” ranking, Langfuse ranks #1 and Helicone ranks #3. The table compares their verified basics; how we rank.
| Feature | Langfuse | Helicone |
|---|---|---|
| What it is | Open-source LLM observability, tracing and evals. | Open-source LLM observability and gateway. |
| Category | Evals & observability | Evals & observability |
| Pricing model | open-source | open-source |
| Integrations | API | API |
| Self-hostable | Yes | Yes |
| Open-source repo | langfuse/langfuse | Helicone/helicone |
| Rank in “Best agent tracing & evals” | #1 | #3 |
| StackRank score | Not yet benchmarked | Not yet benchmarked |
| Last verified | Oct 14, 2026 | Oct 14, 2026 |
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Open-source LLM observability and gateway.
Evals & observabilityopen-source