When comparing MindMup vs Polynote, the Slant community recommends MindMup for most people. In the question“What is the best cross-platform note-taking app?” MindMup is ranked 17th while Polynote is ranked 59th. The most important reason people chose MindMup is:
MindMup allows focusing on thoughts and productively capture them without getting in the way.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Frictionless interface
MindMup allows focusing on thoughts and productively capture them without getting in the way.
Pro Browser-based
Don't need to install anything, just open the website and you are set.
Pro Just works
Pro Compatible with Google Drive and Github
Pro Easy sharing & presenting
After taking notes, it only takes seconds to share and/or prepare them for presentations.
Pro Free and open source
MindMup is free with source code available on GitHub.
Pro Real-time collaborative
Multiple users can edit a note simultaneously, in real time.
Pro Minimal interface
The application is simple and fast. Can create, share and organize notes and notebooks on the same page.
Cons
Con Note capacity is limited
MindMup is good for mapping out thoughts that could be summarized in bullet points, but longer notes aren't as practical for this service.
Con Unconventional note taking style
It's a mind mapping application, not a traditional text based note storage platform.

Con No free tier
Plynote has a 15-day free trial after which it requires a 20$/user/year subscription.
