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Prompt Declaration Language vs Rivet: catalog facts
Prompt Declaration Language	Rivet
Free Free to use; model providers it calls may charge separately.	Free Free and open source, developed by Ironclad.
macOS, Command line	Windows, macOS, Linux
Prompts written as declarative YAML with enforced structure Not tied to a particular programming language	Node-based graph editor for designing complex prompt chains Remote debugging of graphs running inside your application
Requires learning a new YAML-based language Aimed at developers rather than everyday AI users	Aimed at developers building LLM applications rather than end users Requires your own model provider setup to run graphs
Downloadable app	Downloadable app
Closed 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 2, 2026	Official website Full listing and sources Checked October 1, 2026

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