Arize Phoenix
A self-hostable AI observability workspace for inspecting traces, replaying model calls, managing prompts, and comparing experiments on shared datasets.
✓ Free optionFree to self-host; infrastructure extra
The tool directory
A better fit starts here.
Explore 76 AI tools. Find what fits your task, compare the trade-offs, and build your shortlist.
Langfuse
An AI engineering platform connecting application traces, cost and latency metrics, prompt versions, datasets, and evaluation results.
✓ Free optionCore: $29/month plus excess usage
LangSmith
An AI application platform for tracing agents, inspecting production behavior, gathering feedback, and turning recorded runs into evaluation datasets.
✓ Free optionPlus: $39/seat/month plus usage