FlowLine

FlowLine is the flight simulator for AI agents. Describe your agent in plain English and it draws the full design, then runs 1,500 simulated requests to show what it will cost, how fast it answers, where it fails and where it's open to prompt injection. Fix weak spots in one click, then export to LangGraph, CrewAI, OpenAI Agents SDK, Claude Agent SDK or n8n. Free. Bring your own key, nothing stored.