Open-source agent tracing, evals and prompt management.
WebsiteProvisional comparison
Langfuse vs Opik
Langfuse is provisional S-tier and Opik is provisional A-tier on Agent Observability & Evals. Rankings are never for sale.
Full Agent Observability & Evals tier list
| Field | Langfuse | Opik |
|---|---|---|
| Tier | S · provisional | A · provisional |
| Why | Leading open-source observability (35k+ stars), self-hostable. | Fast-growing open-source eval/tracing tool (22k+ stars). |
| Pricing | open-source / freemium cloud · starts at $29/mo | open-source / freemium |
| GitHub stars | 35,875 | 22,628 |
| Last push | Oct 15, 2026 | Oct 15, 2026 |
| Last verified | Oct 15, 2026 | Oct 15, 2026 |