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FastGPT vs Langflow: catalog facts
FastGPT	Langflow
Free Free to self-host; the repository also references separate pro components.	Free Free and open source under the MIT license.
Web, Self-hosted	Web, Self-hosted
Knowledge-base Q&A with RAG retrieval Visual AI workflow editor	Visual canvas plus built-in API and MCP server output Supports a large library of LLMs, vector databases and tools
Licence terms are not stated in the research Some features live in separate pro components	Requires separate access to whichever LLM providers or local models you connect Complex workflows can require developer-level setup
Self-hosted	Self-hosted, Web application
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.