Langflow
Visual low-code builder for AI agents, RAG and MCP flows in Python; each flow can be served as an API or MCP server.
- License
- MIT
- Platforms
- Windows, macOS, Linux, Docker, Web
- Own API keys
- Yes
- Checked
- 2026-09-24
Langflow works with OpenAI-compatible APIs. Grab a free key and a model from the catalog: for coding · for agents · providers and base URLs
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FAQ
Is Langflow free?
Free and MIT-licensed: self-host it or use the free Langflow Desktop app for Windows and macOS.
Does Langflow work with free models?
Yes. It supports your own keys and OpenAI-compatible APIs, so you can plug in free models from OpenRouter, Groq, NVIDIA Build, or a local Ollama.
What license does Langflow use?
MIT. The source code is open.