LLM Observability

Langfuse · LangSmith · Helicone · Braintrust · 4 tools tracked

Strong

Open-source LLM observability platform for tracing, evaluating, and debugging AI applications — self-host or use the cloud.

TypeScriptPythonOpen Source

Strong

LangChain's observability and evaluation platform — trace, debug, and evaluate LLM applications with deep LangChain ecosystem integration.

TypeScriptPythonLangChain

Good

Lightweight LLM observability via a proxy URL swap — get cost tracking, request logging, and caching with a one-line integration.

TypeScriptOpen SourceProxy

Good

AI evaluation and observability platform focused on running structured evals, scoring LLM outputs, and prompt iteration workflows.

TypeScriptPythonEvals

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