1.langfuse / langfuse
🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.
+375 stars
from 36,469 · score 5.93
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2.promptfoo / promptfoo
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.
+282 stars
from 26,422 · score 5.65
3.ComposioHQ / composio
Composio powers 1000+ toolkits, tool search, context management, authentication, and a sandboxed workbench to help you build AI agents that turn intent into action.
+121 stars
from 30,747 · score 4.80
4.Portkey-AI / gateway
A blazing fast AI Gateway with integrated guardrails. Route to 1,600+ LLMs, 50+ AI Guardrails with 1 fast & friendly API.
+27 stars
from 13,274 · score 3.33
5.langwatch / langwatch
Open-Source Agent Observability & Evals for AI Platform teams. Trace, test, route and govern every agent & coding assistant in the company.
+12 stars
from 4,991 · score 2.56