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Org mode vs OmniOutliner: catalog facts
Org mode	OmniOutliner
Free Free and open source, with optional support through Liberapay.	Paid One-time purchase or subscription covering all Apple platforms, with a 14-day free trial.
Windows, macOS, Linux	macOS, iOS
Notes, tasks, agenda and documents in one plain text format Files are easy to sync and version control	Columns, including smart columns for calculations Attachments inside outlines
Requires GNU Emacs for the full feature set Steep learning curve for people new to Emacs	Apple platforms only Paid after the trial
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	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 September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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