← LLM observability & evals
Compare 2 llm observability & evals APIs
| Langfuse Cloud (Core) Langfuse | Helicone (Pro) Helicone | |
|---|---|---|
| $ / mo · 1M events | $101.00 Verified Oct 6, 2026 | $79.00 Unverified sample |
| Quality | – | – |
| Speed | – | – |
| Evaluations | Yes | Yes |
| Prompt management | Yes | Yes |
| Open source | Yes | Yes |
| Self-hosting | Yes | Yes |
| Retention on the priced plan | 90 days | — |
| Free tier | Yes | Yes |