# Agent observability & evals compared head to head > 120 head-to-head comparisons of agent tracing, monitoring and evaluation tools for AI agents, grouped by the job each pair shares, with benchmark scores for both sides. - Canonical: https://www.anchorterminal.com/compare/agent-observability/ - Markdown: https://www.anchorterminal.com/compare/agent-observability/index.md (~4,200 tokens) - Slim: https://www.anchorterminal.com/compare/agent-observability/index.min.md (~4,130 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/agent-observability/index.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Updated: 2026-10-09 - Ranked table: https://www.anchorterminal.com/categories/agent-observability.md - Shortlist and picks by need: https://www.anchorterminal.com/best/agent-observability/index.md ## Ranked 1. [Arize Phoenix](https://www.anchorterminal.com/tools/arize-phoenix.md) BB 75.4 2. [Langfuse API + MCP](https://www.anchorterminal.com/tools/langfuse.md) BB 72.7 3. [LangSmith API + MCP](https://www.anchorterminal.com/tools/langsmith.md) BB 71.1 4. [W&B Weave](https://www.anchorterminal.com/tools/wandb-weave.md) B 66.7 5. [Prefactor](https://www.anchorterminal.com/tools/prefactor.md) B 65.6 6. [Respan API + MCP](https://www.anchorterminal.com/tools/respan.md) B 65.5 7. [LangWatch](https://www.anchorterminal.com/tools/langwatch.md) B 65.5 8. [Pydantic Logfire](https://www.anchorterminal.com/tools/pydantic-logfire.md) B 64.9 9. [DeepEval](https://www.anchorterminal.com/tools/deepeval.md) B 64.7 10. [MLflow Tracing](https://www.anchorterminal.com/tools/mlflow-tracing.md) C 61.2 11. [Braintrust API + MCP](https://www.anchorterminal.com/tools/braintrust.md) C 61.1 12. [Laminar API + MCP](https://www.anchorterminal.com/tools/laminar.md) C 56.6 13. [HoneyHive](https://www.anchorterminal.com/tools/honeyhive.md) C 55.7 14. [Galileo API + MCP](https://www.anchorterminal.com/tools/galileo.md) D 47.7 15. [Helicone AI Gateway + MCP](https://www.anchorterminal.com/tools/helicone.md) D 46.9 ## Agent tracing - [Arize Phoenix vs Baserun](https://www.anchorterminal.com/compare/arize-phoenix-vs-baserun.md): BB 75.4 vs F 7 - [Arize Phoenix vs Braintrust API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-braintrust.md): BB 75.4 vs C 61.1 - [Arize Phoenix vs DeepEval](https://www.anchorterminal.com/compare/arize-phoenix-vs-deepeval.md): BB 75.4 vs B 64.7 - [Arize Phoenix vs Galileo API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-galileo.md): BB 75.4 vs D 47.7 - [Arize Phoenix vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-helicone.md): BB 75.4 vs D 46.9 - [Arize Phoenix vs HoneyHive](https://www.anchorterminal.com/compare/arize-phoenix-vs-honeyhive.md): BB 75.4 vs C 55.7 - [Arize Phoenix vs Laminar API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-laminar.md): BB 75.4 vs C 56.6 - [Arize Phoenix vs Langfuse API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-langfuse.md): BB 75.4 vs BB 72.7 - [Arize Phoenix vs LangSmith API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-langsmith.md): BB 75.4 vs BB 71.1 - [Arize Phoenix vs LangWatch](https://www.anchorterminal.com/compare/arize-phoenix-vs-langwatch.md): BB 75.4 vs B 65.5 - [Arize Phoenix vs MLflow Tracing](https://www.anchorterminal.com/compare/arize-phoenix-vs-mlflow-tracing.md): BB 75.4 vs C 61.2 - [Arize Phoenix vs Prefactor](https://www.anchorterminal.com/compare/arize-phoenix-vs-prefactor.md): BB 75.4 vs B 65.6 - [Arize Phoenix vs Pydantic Logfire](https://www.anchorterminal.com/compare/arize-phoenix-vs-pydantic-logfire.md): BB 75.4 vs B 64.9 - [Arize Phoenix vs Respan API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-respan.md): BB 75.4 vs B 65.5 - [Arize Phoenix vs W&B Weave](https://www.anchorterminal.com/compare/arize-phoenix-vs-wandb-weave.md): BB 75.4 vs B 66.7 - [Baserun vs Braintrust API + MCP](https://www.anchorterminal.com/compare/baserun-vs-braintrust.md): F 7 vs C 61.1 - [Baserun vs DeepEval](https://www.anchorterminal.com/compare/baserun-vs-deepeval.md): F 7 vs B 64.7 - [Baserun vs Galileo API + MCP](https://www.anchorterminal.com/compare/baserun-vs-galileo.md): F 7 vs D 47.7 - [Baserun vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/baserun-vs-helicone.md): F 7 vs D 46.9 - [Baserun vs HoneyHive](https://www.anchorterminal.com/compare/baserun-vs-honeyhive.md): F 7 vs C 55.7 - [Baserun vs Laminar API + MCP](https://www.anchorterminal.com/compare/baserun-vs-laminar.md): F 7 vs C 56.6 - [Baserun vs Langfuse API + MCP](https://www.anchorterminal.com/compare/baserun-vs-langfuse.md): F 7 vs BB 72.7 - [Baserun vs LangSmith API + MCP](https://www.anchorterminal.com/compare/baserun-vs-langsmith.md): F 7 vs BB 71.1 - [Baserun vs LangWatch](https://www.anchorterminal.com/compare/baserun-vs-langwatch.md): F 7 vs B 65.5 - [Baserun vs MLflow Tracing](https://www.anchorterminal.com/compare/baserun-vs-mlflow-tracing.md): F 7 vs C 61.2 - [Baserun vs Prefactor](https://www.anchorterminal.com/compare/baserun-vs-prefactor.md): F 7 vs B 65.6 - [Baserun vs Pydantic Logfire](https://www.anchorterminal.com/compare/baserun-vs-pydantic-logfire.md): F 7 vs B 64.9 - [Baserun vs Respan API + MCP](https://www.anchorterminal.com/compare/baserun-vs-respan.md): F 7 vs B 65.5 - [Baserun vs W&B Weave](https://www.anchorterminal.com/compare/baserun-vs-wandb-weave.md): F 7 vs B 66.7 - [Braintrust API + MCP vs DeepEval](https://www.anchorterminal.com/compare/braintrust-vs-deepeval.md): C 61.1 vs B 64.7 - [Braintrust API + MCP vs Galileo API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-galileo.md): C 61.1 vs D 47.7 - [Braintrust API + MCP vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/braintrust-vs-helicone.md): C 61.1 vs D 46.9 - [Braintrust API + MCP vs HoneyHive](https://www.anchorterminal.com/compare/braintrust-vs-honeyhive.md): C 61.1 vs C 55.7 - [Braintrust API + MCP vs Laminar API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-laminar.md): C 61.1 vs C 56.6 - [Braintrust API + MCP vs Langfuse API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-langfuse.md): C 61.1 vs BB 72.7 - [Braintrust API + MCP vs LangSmith API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-langsmith.md): C 61.1 vs BB 71.1 - [Braintrust API + MCP vs LangWatch](https://www.anchorterminal.com/compare/braintrust-vs-langwatch.md): C 61.1 vs B 65.5 - [Braintrust API + MCP vs MLflow Tracing](https://www.anchorterminal.com/compare/braintrust-vs-mlflow-tracing.md): C 61.1 vs C 61.2 - [Braintrust API + MCP vs Prefactor](https://www.anchorterminal.com/compare/braintrust-vs-prefactor.md): C 61.1 vs B 65.6 - [Braintrust API + MCP vs Pydantic Logfire](https://www.anchorterminal.com/compare/braintrust-vs-pydantic-logfire.md): C 61.1 vs B 64.9 - [Braintrust API + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-respan.md): C 61.1 vs B 65.5 - [Braintrust API + MCP vs W&B Weave](https://www.anchorterminal.com/compare/braintrust-vs-wandb-weave.md): C 61.1 vs B 66.7 - [Galileo API + MCP vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/galileo-vs-helicone.md): D 47.7 vs D 46.9 - [Galileo API + MCP vs HoneyHive](https://www.anchorterminal.com/compare/galileo-vs-honeyhive.md): D 47.7 vs C 55.7 - [Galileo API + MCP vs Laminar API + MCP](https://www.anchorterminal.com/compare/galileo-vs-laminar.md): D 47.7 vs C 56.6 - [Galileo API + MCP vs Langfuse API + MCP](https://www.anchorterminal.com/compare/galileo-vs-langfuse.md): D 47.7 vs BB 72.7 - [Galileo API + MCP vs LangSmith API + MCP](https://www.anchorterminal.com/compare/galileo-vs-langsmith.md): D 47.7 vs BB 71.1 - [Galileo API + MCP vs LangWatch](https://www.anchorterminal.com/compare/galileo-vs-langwatch.md): D 47.7 vs B 65.5 - [Galileo API + MCP vs MLflow Tracing](https://www.anchorterminal.com/compare/galileo-vs-mlflow-tracing.md): D 47.7 vs C 61.2 - [Galileo API + MCP vs Prefactor](https://www.anchorterminal.com/compare/galileo-vs-prefactor.md): D 47.7 vs B 65.6 - [Galileo API + MCP vs Pydantic Logfire](https://www.anchorterminal.com/compare/galileo-vs-pydantic-logfire.md): D 47.7 vs B 64.9 - [Galileo API + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/galileo-vs-respan.md): D 47.7 vs B 65.5 - [Galileo API + MCP vs W&B Weave](https://www.anchorterminal.com/compare/galileo-vs-wandb-weave.md): D 47.7 vs B 66.7 - [Helicone AI Gateway + MCP vs HoneyHive](https://www.anchorterminal.com/compare/helicone-vs-honeyhive.md): D 46.9 vs C 55.7 - [Helicone AI Gateway + MCP vs Laminar API + MCP](https://www.anchorterminal.com/compare/helicone-vs-laminar.md): D 46.9 vs C 56.6 - [Helicone AI Gateway + MCP vs Langfuse API + MCP](https://www.anchorterminal.com/compare/helicone-vs-langfuse.md): D 46.9 vs BB 72.7 - [Helicone AI Gateway + MCP vs LangSmith API + MCP](https://www.anchorterminal.com/compare/helicone-vs-langsmith.md): D 46.9 vs BB 71.1 - [Helicone AI Gateway + MCP vs LangWatch](https://www.anchorterminal.com/compare/helicone-vs-langwatch.md): D 46.9 vs B 65.5 - [Helicone AI Gateway + MCP vs MLflow Tracing](https://www.anchorterminal.com/compare/helicone-vs-mlflow-tracing.md): D 46.9 vs C 61.2 - [Helicone AI Gateway + MCP vs Prefactor](https://www.anchorterminal.com/compare/helicone-vs-prefactor.md): D 46.9 vs B 65.6 - [Helicone AI Gateway + MCP vs Pydantic Logfire](https://www.anchorterminal.com/compare/helicone-vs-pydantic-logfire.md): D 46.9 vs B 64.9 - [Helicone AI Gateway + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/helicone-vs-respan.md): D 46.9 vs B 65.5 - [Helicone AI Gateway + MCP vs W&B Weave](https://www.anchorterminal.com/compare/helicone-vs-wandb-weave.md): D 46.9 vs B 66.7 - [HoneyHive vs Laminar API + MCP](https://www.anchorterminal.com/compare/honeyhive-vs-laminar.md): C 55.7 vs C 56.6 - [HoneyHive vs Langfuse API + MCP](https://www.anchorterminal.com/compare/honeyhive-vs-langfuse.md): C 55.7 vs BB 72.7 - [HoneyHive vs LangSmith API + MCP](https://www.anchorterminal.com/compare/honeyhive-vs-langsmith.md): C 55.7 vs BB 71.1 - [HoneyHive vs LangWatch](https://www.anchorterminal.com/compare/honeyhive-vs-langwatch.md): C 55.7 vs B 65.5 - [HoneyHive vs MLflow Tracing](https://www.anchorterminal.com/compare/honeyhive-vs-mlflow-tracing.md): C 55.7 vs C 61.2 - [HoneyHive vs Prefactor](https://www.anchorterminal.com/compare/honeyhive-vs-prefactor.md): C 55.7 vs B 65.6 - [HoneyHive vs Pydantic Logfire](https://www.anchorterminal.com/compare/honeyhive-vs-pydantic-logfire.md): C 55.7 vs B 64.9 - [HoneyHive vs Respan API + MCP](https://www.anchorterminal.com/compare/honeyhive-vs-respan.md): C 55.7 vs B 65.5 - [HoneyHive vs W&B Weave](https://www.anchorterminal.com/compare/honeyhive-vs-wandb-weave.md): C 55.7 vs B 66.7 - [Laminar API + MCP vs Langfuse API + MCP](https://www.anchorterminal.com/compare/laminar-vs-langfuse.md): C 56.6 vs BB 72.7 - [Laminar API + MCP vs LangSmith API + MCP](https://www.anchorterminal.com/compare/laminar-vs-langsmith.md): C 56.6 vs BB 71.1 - [Laminar API + MCP vs LangWatch](https://www.anchorterminal.com/compare/laminar-vs-langwatch.md): C 56.6 vs B 65.5 - [Laminar API + MCP vs MLflow Tracing](https://www.anchorterminal.com/compare/laminar-vs-mlflow-tracing.md): C 56.6 vs C 61.2 - [Laminar API + MCP vs Prefactor](https://www.anchorterminal.com/compare/laminar-vs-prefactor.md): C 56.6 vs B 65.6 - [Laminar API + MCP vs Pydantic Logfire](https://www.anchorterminal.com/compare/laminar-vs-pydantic-logfire.md): C 56.6 vs B 64.9 - [Laminar API + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/laminar-vs-respan.md): C 56.6 vs B 65.5 - [Laminar API + MCP vs W&B Weave](https://www.anchorterminal.com/compare/laminar-vs-wandb-weave.md): C 56.6 vs B 66.7 - [Langfuse API + MCP vs LangSmith API + MCP](https://www.anchorterminal.com/compare/langfuse-vs-langsmith.md): BB 72.7 vs BB 71.1 - [Langfuse API + MCP vs LangWatch](https://www.anchorterminal.com/compare/langfuse-vs-langwatch.md): BB 72.7 vs B 65.5 - [Langfuse API + MCP vs MLflow Tracing](https://www.anchorterminal.com/compare/langfuse-vs-mlflow-tracing.md): BB 72.7 vs C 61.2 - [Langfuse API + MCP vs Prefactor](https://www.anchorterminal.com/compare/langfuse-vs-prefactor.md): BB 72.7 vs B 65.6 - [Langfuse API + MCP vs Pydantic Logfire](https://www.anchorterminal.com/compare/langfuse-vs-pydantic-logfire.md): BB 72.7 vs B 64.9 - [Langfuse API + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/langfuse-vs-respan.md): BB 72.7 vs B 65.5 - [Langfuse API + MCP vs W&B Weave](https://www.anchorterminal.com/compare/langfuse-vs-wandb-weave.md): BB 72.7 vs B 66.7 - [LangSmith API + MCP vs LangWatch](https://www.anchorterminal.com/compare/langsmith-vs-langwatch.md): BB 71.1 vs B 65.5 - [LangSmith API + MCP vs MLflow Tracing](https://www.anchorterminal.com/compare/langsmith-vs-mlflow-tracing.md): BB 71.1 vs C 61.2 - [LangSmith API + MCP vs Prefactor](https://www.anchorterminal.com/compare/langsmith-vs-prefactor.md): BB 71.1 vs B 65.6 - [LangSmith API + MCP vs Pydantic Logfire](https://www.anchorterminal.com/compare/langsmith-vs-pydantic-logfire.md): BB 71.1 vs B 64.9 - [LangSmith API + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/langsmith-vs-respan.md): BB 71.1 vs B 65.5 - [LangSmith API + MCP vs W&B Weave](https://www.anchorterminal.com/compare/langsmith-vs-wandb-weave.md): BB 71.1 vs B 66.7 - [LangWatch vs MLflow Tracing](https://www.anchorterminal.com/compare/langwatch-vs-mlflow-tracing.md): B 65.5 vs C 61.2 - [LangWatch vs Prefactor](https://www.anchorterminal.com/compare/langwatch-vs-prefactor.md): B 65.5 vs B 65.6 - [LangWatch vs Pydantic Logfire](https://www.anchorterminal.com/compare/langwatch-vs-pydantic-logfire.md): B 65.5 vs B 64.9 - [LangWatch vs Respan API + MCP](https://www.anchorterminal.com/compare/langwatch-vs-respan.md): B 65.5 vs B 65.5 - [LangWatch vs W&B Weave](https://www.anchorterminal.com/compare/langwatch-vs-wandb-weave.md): B 65.5 vs B 66.7 - [MLflow Tracing vs Prefactor](https://www.anchorterminal.com/compare/mlflow-tracing-vs-prefactor.md): C 61.2 vs B 65.6 - [MLflow Tracing vs Pydantic Logfire](https://www.anchorterminal.com/compare/mlflow-tracing-vs-pydantic-logfire.md): C 61.2 vs B 64.9 - [MLflow Tracing vs Respan API + MCP](https://www.anchorterminal.com/compare/mlflow-tracing-vs-respan.md): C 61.2 vs B 65.5 - [MLflow Tracing vs W&B Weave](https://www.anchorterminal.com/compare/mlflow-tracing-vs-wandb-weave.md): C 61.2 vs B 66.7 - [Prefactor vs Pydantic Logfire](https://www.anchorterminal.com/compare/prefactor-vs-pydantic-logfire.md): B 65.6 vs B 64.9 - [Prefactor vs Respan API + MCP](https://www.anchorterminal.com/compare/prefactor-vs-respan.md): B 65.6 vs B 65.5 - [Prefactor vs W&B Weave](https://www.anchorterminal.com/compare/prefactor-vs-wandb-weave.md): B 65.6 vs B 66.7 - [Pydantic Logfire vs Respan API + MCP](https://www.anchorterminal.com/compare/pydantic-logfire-vs-respan.md): B 64.9 vs B 65.5 - [Pydantic Logfire vs W&B Weave](https://www.anchorterminal.com/compare/pydantic-logfire-vs-wandb-weave.md): B 64.9 vs B 66.7 - [Respan API + MCP vs W&B Weave](https://www.anchorterminal.com/compare/respan-vs-wandb-weave.md): B 65.5 vs B 66.7 ## Evaluations - [DeepEval vs Galileo API + MCP](https://www.anchorterminal.com/compare/deepeval-vs-galileo.md): B 64.7 vs D 47.7 - [DeepEval vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/deepeval-vs-helicone.md): B 64.7 vs D 46.9 - [DeepEval vs HoneyHive](https://www.anchorterminal.com/compare/deepeval-vs-honeyhive.md): B 64.7 vs C 55.7 - [DeepEval vs Laminar API + MCP](https://www.anchorterminal.com/compare/deepeval-vs-laminar.md): B 64.7 vs C 56.6 - [DeepEval vs Langfuse API + MCP](https://www.anchorterminal.com/compare/deepeval-vs-langfuse.md): B 64.7 vs BB 72.7 - [DeepEval vs LangSmith API + MCP](https://www.anchorterminal.com/compare/deepeval-vs-langsmith.md): B 64.7 vs BB 71.1 - [DeepEval vs LangWatch](https://www.anchorterminal.com/compare/deepeval-vs-langwatch.md): B 64.7 vs B 65.5 - [DeepEval vs MLflow Tracing](https://www.anchorterminal.com/compare/deepeval-vs-mlflow-tracing.md): B 64.7 vs C 61.2 - [DeepEval vs Prefactor](https://www.anchorterminal.com/compare/deepeval-vs-prefactor.md): B 64.7 vs B 65.6 - [DeepEval vs Pydantic Logfire](https://www.anchorterminal.com/compare/deepeval-vs-pydantic-logfire.md): B 64.7 vs B 64.9 - [DeepEval vs Respan API + MCP](https://www.anchorterminal.com/compare/deepeval-vs-respan.md): B 64.7 vs B 65.5 - [DeepEval vs W&B Weave](https://www.anchorterminal.com/compare/deepeval-vs-wandb-weave.md): B 64.7 vs B 66.7