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Arc Studio vs WriterDuet: catalog facts
Arc Studio	WriterDuet
Freemium Free to start without a credit card, with a paid Pro tier.	Freemium A free tier is available, with paid plans for more features.
Web	Web
Whiteboard outlining with story beat cards Outline and notes shown beside the script	Real-time co-writing on the same script Covers planning, writing and sharing a script
Advanced features require a paid plan Requires an account	Proprietary software Mainly useful for scripts rather than general writing
Downloadable app, Web application	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Account 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 2, 2026

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