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Rivet vs Sim: catalog facts
Rivet	Sim
Free Free and open source, developed by Ironclad.	Freemium Open source to self-host; the hosted workspace is available with sales-led plans for…
Windows, macOS, Linux	Web, Self-hosted, Command line
Node-based graph editor for designing complex prompt chains Remote debugging of graphs running inside your application	Visual workflow canvas plus conversational and code building Hundreds of integrations and support for major LLMs
Aimed at developers building LLM applications rather than end users Requires your own model provider setup to run graphs	Organisation-focused features add complexity for solo use Advanced governance features point toward sales-led plans
Downloadable app	Web application, Self-hosted
Open source	Open source
License not stated	License not stated
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 October 1, 2026	Official website Full listing and sources Checked September 26, 2026

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