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