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Arc Studio vs Celtx: catalog facts
Arc Studio	Celtx
Freemium Free to start without a credit card, with a paid Pro tier.	Freemium Free account available, with a 7-day trial of paid features.
Web	Web
Whiteboard outlining with story beat cards Outline and notes shown beside the script	Script editors for many formats, including theater and games Storyboard and beat sheet tools
Advanced features require a paid plan Requires an account	Many features sit behind paid plans Requires an account
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.