# Observability (12)

See what your agent did and what it cost.

| slug | name | tier | stars | what | md |
|---|---|---|---|---|---|
| langfuse | Langfuse | catalog | 35875 | Open-source tracing and evals for LLM apps. | /setups/langfuse.md |
| mlflow | MLflow | catalog | 28399 | ML and LLM lifecycle platform with tracing. | /setups/mlflow.md |
| opik | Opik | catalog | 22627 | Trace, evaluate and monitor LLM apps. | /setups/opik.md |
| phoenix | Phoenix | catalog | 11858 | Open-source LLM tracing and evaluation. | /setups/phoenix.md |
| evidently | Evidently | catalog | 7991 | Evaluate and monitor ML and LLM systems. | /setups/evidently.md |
| openllmetry | OpenLLMetry | catalog | 7497 | OpenTelemetry instrumentation for LLM apps. | /setups/openllmetry.md |
| helicone | Helicone | catalog | 6224 | LLM observability via a one-line proxy. | /setups/helicone.md |
| agentops | AgentOps | catalog | 5887 | Monitoring and cost tracking for agents. | /setups/agentops.md |
| agenta | Agenta | catalog | 4836 | Prompt management, evals and observability. | /setups/agenta.md |
| logfire | Logfire | catalog | 4512 | Observability for LLM and agent systems. | /setups/logfire.md |
| openlit | OpenLIT | catalog | 2851 | OpenTelemetry-native tracing and guardrails. | /setups/openlit.md |
| weave | Weave | catalog | 1141 | W&B toolkit for tracing and evaluating AI apps. | /setups/weave.md |