Flowise is itself an open-source (Apache-2.0) visual builder for LLM apps and agents, free to self-host, with a separate paid Flowise Cloud tier for hosted usage above the free plan's limits. Teams that want a different visual builder, or one built on a different underlying framework, compare it against similar tools.
Langflow is the closest alternative — also a visual, drag-and-drop builder for AI agents and RAG pipelines, also built on LangChain concepts, and also free to self-host.
FAQ
Is there a free, open-source alternative to Flowise?
Flowise itself is already free and open source to self-host. Langflow is another open-source option free to self-host.
What's the best open-source alternative to Flowise?
Langflow is the closest match — a similarly visual, LangChain-powered builder for agents and RAG pipelines.
What are the top open-source alternatives to Flowise?
Browse all open-source alternatives to Flowise above, or explore the full AI Interaction category for more options.