Open Source LLM Observability & Evaluation using npm
A curated collection of the best open source tracing, monitoring, and evaluation platforms for LLM and AI-agent applications. using npm.
Open source LLM engineering platform for AI-powered applications
Stars
35,238Last commit
4 hours agoLicense
MIT
Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.
Open Source Alternative to:
Monitor LLM performance with open-source observability
Stars
7,463Last commit
1 day agoLicense
Apache-2.0
Open-source observability platform for LLMs using OpenTelemetry. Monitor performance, track costs, and debug AI applications with just 2 lines of code.
Open Source Alternative to:
Build reliable AI apps with comprehensive observability
Stars
6,190Last commit
14 days agoLicense
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:
Build, automate, and improve AI agents with your team
Stars
4,799Last commit
2 hours agoLicense
MIT
Open-source workspace for building and running AI agents: chat-driven development, scheduling, human-in-the-loop approvals, versioning, and tracing. Self-host or use the cloud.
Open Source Alternative to:
Simulation-based testing and evaluation for AI agents
Stars
4,891Last commit
1 hour agoLicense
Apache-2.0
Tests AI agents through multi-turn simulations, LLM-based scoring, and production tracing so teams can ship reliable agents with confidence.
Open Source Alternative to:
Monitor, debug, and scale LLM applications with ease
Stars
2,807Last commit
2 hours agoLicense
Apache-2.0
Open-source observability platform for GenAI and LLM applications. Real-time monitoring, distributed tracing, prompt management, and AI model evaluation built on OpenTelemetry.
Open Source Alternative to:
Experiment tracking platform for ML teams
Stars
392Last commit
7 months agoLicense
Apache-2.0
Open source ML experiment tracking platform with parameter and gradient logging, media tracking, real-time alerts, and full Weights & Biases API compatibility.
Open Source Alternative to:
InfluxDB – The purpose-built time series platform for high-velocity ingestion and real-time queries at scale.
Openlane