AI Graph Studio is a free, open-source, vendor-neutral visual workbench for designing, documenting and analyzing agentic AI architectures. Build graphs with agents, LLMs, tools, routing, memory, RAG, loops, evaluators, guardrails, human approvals and parallel flows. Analyze architectural issues, estimate tokens and costs, simulate workflows, and export to JSON, SVG, PNG, Markdown or Mermaid. Runs locally in your browser with no account or API keys required.