Compare tools head to head

240 direct comparisons, each showing the billing meter, licence, self-hosting position and our verdict for both tools. Discontinued and absorbed products are excluded.

Comparing on price alone will mislead you - these tools meter different things. Use the cost calculator instead →

Observability & Tracing

Trace, log and monitor LLM applications in production.

Langfuse vs Opik Langfuse vs Pydantic Logfire Langfuse vs Arize AX Langfuse vs Arize Phoenix Langfuse vs Galileo Langfuse vs HoneyHive Opik vs Pydantic Logfire Opik vs Arize AX Opik vs Arize Phoenix Opik vs Galileo Opik vs HoneyHive Opik vs Laminar Pydantic Logfire vs Arize AX Pydantic Logfire vs Arize Phoenix Pydantic Logfire vs Galileo Pydantic Logfire vs HoneyHive Pydantic Logfire vs Laminar Pydantic Logfire vs MLflow Arize AX vs Arize Phoenix Arize AX vs Galileo Arize AX vs HoneyHive Arize AX vs Laminar Arize AX vs MLflow Arize AX vs OpenLIT Arize Phoenix vs Galileo Arize Phoenix vs HoneyHive Arize Phoenix vs Laminar Arize Phoenix vs MLflow Arize Phoenix vs OpenLIT Arize Phoenix vs SigNoz Galileo vs HoneyHive Galileo vs Laminar Galileo vs MLflow Galileo vs OpenLIT Galileo vs SigNoz Galileo vs W&B Weave HoneyHive vs Laminar HoneyHive vs MLflow HoneyHive vs OpenLIT HoneyHive vs SigNoz HoneyHive vs W&B Weave HoneyHive vs Datadog LLM Observability Laminar vs MLflow Laminar vs OpenLIT Laminar vs SigNoz Laminar vs W&B Weave Laminar vs Datadog LLM Observability Laminar vs LangSmith MLflow vs OpenLIT MLflow vs SigNoz MLflow vs W&B Weave MLflow vs Datadog LLM Observability MLflow vs LangSmith MLflow vs Langtrace OpenLIT vs SigNoz OpenLIT vs W&B Weave OpenLIT vs Datadog LLM Observability OpenLIT vs LangSmith OpenLIT vs Langtrace OpenLIT vs Lunary SigNoz vs W&B Weave SigNoz vs Datadog LLM Observability SigNoz vs LangSmith SigNoz vs Langtrace SigNoz vs Lunary SigNoz vs Traceloop W&B Weave vs Datadog LLM Observability W&B Weave vs LangSmith W&B Weave vs Langtrace W&B Weave vs Lunary W&B Weave vs Traceloop W&B Weave vs Helicone Datadog LLM Observability vs LangSmith Datadog LLM Observability vs Langtrace Datadog LLM Observability vs Lunary Datadog LLM Observability vs Traceloop Datadog LLM Observability vs Helicone Datadog LLM Observability vs New Relic AI Monitoring LangSmith vs Langtrace LangSmith vs Lunary LangSmith vs Traceloop LangSmith vs Helicone LangSmith vs New Relic AI Monitoring LangSmith vs Sentry Langtrace vs Lunary Langtrace vs Traceloop Langtrace vs Helicone Langtrace vs New Relic AI Monitoring Langtrace vs Sentry Lunary vs Traceloop Lunary vs Helicone Lunary vs New Relic AI Monitoring Lunary vs Sentry Traceloop vs Helicone Traceloop vs New Relic AI Monitoring Traceloop vs Sentry Helicone vs New Relic AI Monitoring Helicone vs Sentry New Relic AI Monitoring vs Sentry

Eval Frameworks

Libraries for scoring model and agent output.

Inspect AI vs Braintrust Inspect AI vs Confident AI Inspect AI vs Confident AI (DeepEval) Inspect AI vs Evidently Inspect AI vs Giskard Inspect AI vs LM Evaluation Harness Braintrust vs Confident AI Braintrust vs Confident AI (DeepEval) Braintrust vs Evidently Braintrust vs Giskard Braintrust vs LM Evaluation Harness Braintrust vs Patronus AI Confident AI vs Confident AI (DeepEval) Confident AI vs Evidently Confident AI vs Giskard Confident AI vs LM Evaluation Harness Confident AI vs Patronus AI Confident AI vs Promptfoo Confident AI (DeepEval) vs Evidently Confident AI (DeepEval) vs Giskard Confident AI (DeepEval) vs LM Evaluation Harness Confident AI (DeepEval) vs Patronus AI Confident AI (DeepEval) vs Promptfoo Confident AI (DeepEval) vs Ragas Evidently vs Giskard Evidently vs LM Evaluation Harness Evidently vs Patronus AI Evidently vs Promptfoo Evidently vs Ragas Evidently vs Openlayer Giskard vs LM Evaluation Harness Giskard vs Patronus AI Giskard vs Promptfoo Giskard vs Ragas Giskard vs Openlayer Giskard vs TruLens LM Evaluation Harness vs Patronus AI LM Evaluation Harness vs Promptfoo LM Evaluation Harness vs Ragas LM Evaluation Harness vs Openlayer LM Evaluation Harness vs TruLens LM Evaluation Harness vs UpTrain Patronus AI vs Promptfoo Patronus AI vs Ragas Patronus AI vs Openlayer Patronus AI vs TruLens Patronus AI vs UpTrain Promptfoo vs Ragas Promptfoo vs Openlayer Promptfoo vs TruLens Promptfoo vs UpTrain Ragas vs Openlayer Ragas vs TruLens Ragas vs UpTrain Openlayer vs TruLens Openlayer vs UpTrain TruLens vs UpTrain

Prompt Management

Version, test and deploy prompts.

Guardrails & Safety

Runtime validation, PII and injection defence.

LLM Gateways

Routing, caching and cost control proxies.

Agent Evaluation

Tools built specifically for multi-step agent traces.