Tag #eval
Arize Phoenix
Arize AI
Open-source LLM and agent observability — OpenTelemetry tracing and evals you can self-host
@arizeai/phoenix-mcp@4.3.122026-09-22PythonElastic-2.0
11.6k Open source Free tier Paid
Langfuse
Langfuse
Open-source tracing, evaluation, and analytics for LLM and agent applications
v4.41.02026-09-21TypeScriptMIT
34.9k Open source Free tier Paid
LangSmith
LangChain
LangChain's hosted platform for tracing, evaluating, and monitoring LLM and agent apps (works with or without LangChain)
SaaS / SDKProprietary
Free tier Paid