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NovelAI vs Sudowrite: catalog facts
NovelAI	Sudowrite
Freemium Story and image generation can be started for free, with paid subscriptions.	Freemium Can be tried for free, with paid plans listed on the pricing page.
Web	Web
Writing space designed for co-authoring fiction Tracks story worlds and characters	Tools built specifically for fiction, such as Describe and brainstorming Uses Muse, a model trained for fiction writing
Image generation is focused on anime style Runs only as an online service	Web only, with no offline use indicated Requires an account to use
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 23, 2026

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