Tracing, logging, and monitoring for LLM and agent systems. Ranked by community traction, with live GitHub stars and what each is best at.
Open-source LLM engineering platform — tracing, evals, prompt management, and metrics for agent apps. Best for LLM tracing.
Arize's open-source observability for LLM apps — OpenTelemetry-based tracing and evaluation. Best for OTel tracing.
Open-source observability for LLM apps via a proxy — logging, caching, and cost tracking with one header. Best for cost tracking.
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