Arthur vs Langfuse

Arthur

7.1 #15 in Model Monitoring Software

About Arthur

Langfuse

8.9 #2 in AI Agent Observability Tools

About Langfuse
ArthurLangfuse
Free planYesYes
Free trialNoNo
Paid from$60/mo$29/mo
Open sourceNoNo
Platformsapi, self-hosted, Webapi, self-hosted, Web
Free planYesYes
Paid from60 /mo29 /mo
Bias monitoringYes—

Both are listed in Best Model Monitoring Software. On Everything Xiaomi, Langfuse scores higher on our published basis.