Ranked in these QuestionsQuestion Ranking
Pro Fast and doesn't require any plugins
Pro Supports 960gs
As well as a standard snap-to-grid, Moqups supports the 960 gridsystem.
Pro Free tier
The Free Plan offers 2 active projects with at most 300 stencils each and 5 MB of storage. This plan does not include: Master Pages, Real Time Collaboration, Privacy Settings, Unlimited Revisions, Unlimited Project Archiving and Teams.
Pro Clean design and very intuitive
Pro Modern Material elements
Pro Keyboard shortcuts
Moqups has an extensive list of keyboard shortcuts. Simply type some A-Z letters to search for components. F1 for an overlay help screen.