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Trelby vs Afterwriting: catalog facts
Trelby	Afterwriting
Free Free software under the GPL.	Free Used in the browser with no pricing shown on the site.
Linux	Web
Enforces correct screenplay formatting and pagination Imports and exports Final Draft and Fountain files	Converts Fountain scripts to formatted PDF Produces statistics about a screenplay
Interface built with wxPython looks dated next to commercial tools No collaboration or cloud sync features mentioned	Only handles Fountain input Not an editor for writing the script itself
Downloadable app	Web application
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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