Open Source LLM Observability & Evaluation using Vitest
A curated collection of the best open source tracing, monitoring, and evaluation platforms for LLM and AI-agent applications. using Vitest.
Open source LLM engineering platform for AI-powered applications
Stars
33,597Last commit
7 hours agoLicense
MIT
Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.
Open Source Alternative to:
Open-source LLM tracing & evaluation for AI optimization
Stars
11,156Last commit
4 hours agoLicense
Elastic-2.0
Open-source platform for LLM tracing, evaluation, and optimization. Features automatic instrumentation, prompt playground, and real-time AI application monitoring.
Open Source Alternative to:
Full observability for AI agents in production
Stars
4,599Last commit
2 days agoLicense
MIT
Open-source platform for monitoring AI agents: captures traces, surfaces failure patterns, alerts on issues, and helps you verify fixes with automated evals.
Open Source Alternative to:
LLM observability: cost, latency, and traces in one place
Stars
12Last commit
4 hours agoLicense
MIT
Drop-in observability platform for OpenAI, Anthropic, and Gemini that logs every request, tracks costs, traces agent workflows, and flags anomalies and PII.
Open Source Alternative to:
Sevalla – Deploy your app before your coffee gets cold. It’s that easy. Try Sevalla with $50 free credit.
Sevalla