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12 tools

LangSmith

Tracing & evaluation

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Langfuse

Open-source observability

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Helicone

Gateway & request analytics

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Braintrust

Experiments & production logs

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Arize Phoenix

Open-source tracing & evals

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W&B Weave

Tracing & evaluation datasets

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Opik

Evaluation & optimization

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Portkey

Now PRISMA AIRS AI Gateway

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LangWatch

Agent testing & monitoring

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Parea

Experiments & human review

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Traceloop

OpenTelemetry & evaluations

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Galileo

Now Splunk Agent Observability

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Langfuse vs LangSmith Helicone vs LangSmith Helicone vs Langfuse Braintrust vs LangSmith Arize Phoenix vs Langfuse Portkey vs Helicone LangWatch vs Langfuse

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AI agents

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LLM evaluations

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Lunary prompt versions and template editor

Prompt management

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AI engineers Product teams Platform teams Lunary + MCP

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