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Instagantt vs OmniPlan: catalog facts
Instagantt	OmniPlan
Freemium Free plan available, with paid plans for more features.	Paid Bought once or by subscription, with a free 14-day trial.
Web	macOS, iOS
Drag-and-drop Gantt scheduling with dependencies Baselines and milestones	Interval and effort tracking with customizable resources Multi-project dashboards across a portfolio
Focused on timelines rather than full work management Hosted only	Apple platforms only Paid after the trial
Web application, Hosted service	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account 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 2, 2026

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