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Open Source LLM Observability & Evaluation using Vertex AI

A curated collection of the best open source tracing, monitoring, and evaluation platforms for LLM and AI-agent applications. using Vertex AI.

Langfuse

AI
Open source LLM engineering platform for AI-powered applications

  • Stars

    Stars growing over the last 30 days36,414

  • Last commit

    10 hours ago

  • License

    MIT
Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.

Open Source Alternative to:

LangSmith

Helicone

AI
Build reliable AI apps with comprehensive observability

  • Stars

    6,238

  • Last commit

    2 days ago

  • License

    Apache-2.0
Open-source platform for logging, monitoring, and debugging LLM applications. Route, debug, and analyze AI apps with comprehensive observability tools.

Open Source Alternative to:

DataDog
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