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Sim vs Langflow: catalog facts
Sim	Langflow
Freemium Open source to self-host; the hosted workspace is available with sales-led plans for…	Free Free and open source under the MIT license.
Web, Self-hosted, Command line	Web, Self-hosted
Visual workflow canvas plus conversational and code building Hundreds of integrations and support for major LLMs	Visual canvas plus built-in API and MCP server output Supports a large library of LLMs, vector databases and tools
Organisation-focused features add complexity for solo use Advanced governance features point toward sales-led plans	Requires separate access to whichever LLM providers or local models you connect Complex workflows can require developer-level setup
Web application, Self-hosted	Self-hosted, Web application
Open 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.