← LLM observability & evals
Compare 3 llm observability & evals APIs
| Braintrust (Pro) Braintrust | Helicone (Pro) Helicone | Langfuse Cloud (Core) Langfuse | |
|---|---|---|---|
| $ / mo · 1M events | $280.00 Unverified sample | $79.00 Unverified sample | $101.00 Verified Oct 6, 2026 |
| Quality | – | – | – |
| Speed | – | – | – |
| Evaluations | Yes | Yes | Yes |
| Prompt management | Yes | Yes | Yes |
| Open source | No | Yes | Yes |
| Self-hosting | Yes | Yes | Yes |
| Retention on the priced plan | 30 days | — | 90 days |
| Free tier | Yes | Yes | Yes |