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Slugline vs Story Architect (STARC): catalog facts
Slugline	Story Architect (STARC)
Freemium Free up to six pages per script; longer scripts need the Unlimited Writing upgrade.	Freemium A free version with unlimited projects is available, and some features are reserved for…
macOS, iOS	Windows, macOS, Linux, iOS
Automatic screenplay formatting as you type Drag-and-drop outline that moves the matching script text	TV series with all episodes kept in one project Screenplays, comics, plays and books share one story bible
Apple platforms only Scripts longer than six pages require a paid upgrade	Proprietary licence on Linux builds AI assistant relies on ChatGPT technology
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Proprietary
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.