Best AI Agent Monitoring: Langfuse, Then a Real Kill Switch
Seven agent monitoring tools priced against the same workload: 50,000 runs a month at 12 steps each. Self-hosted Langfuse wins on cost and audit depth — but only one of these tools sits in the request path where it can actually stop a runaway agent, and that is the part you have to build yourself.
August 11, 2026 · 16 min read