OneNote is a freeform digital notebook: infinite canvas, sections, ink, and deep Microsoft 365 integration. Great for handwriting, meeting notes alongside Outlook, and anything that wants flexible page layout. If you live in the Microsoft ecosystem at work, it is the path of least resistance.
Mindly is not a whiteboard. It's a structured second brain with AI organization and a built-in mind map. One shortcut for capture, cards instead of pages, and connections that emerge automatically across everything you save.
Students who annotate slides in OneNote often pair it with Mindly as a "thinking layer" for synthesis and idea review. The two play different roles: OneNote for the lecture, Mindly for the week of revision that comes after.
The clearest decision point is whether your day is Microsoft-shaped. If meetings live in Outlook, files in SharePoint, and chat in Teams, OneNote slots in with zero friction. If your day is Mac-shaped, with Apple-native apps and a preference for local libraries, Mindly is the more natural fit.
Cost is also worth naming. OneNote is free with a Microsoft account; tighter integrations come with a Microsoft 365 subscription. Mindly is a paid Pro tier on top of a free base. Different bets on what value to bundle, so pick the one whose bundle matches the work you already do.