When comparing Divvy vs Mosaic, the Slant community recommends Divvy for most people. In the question“What is the best window manager for Mac?” Divvy is ranked 3rd while Mosaic is ranked 14th. The most important reason people chose Divvy is:
Although it's not in the same level as something like bug.n, Divvy does support the use of keyboard shortcuts to move windows about. You can even create custom shortcuts.
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Pros
Pro Has keyboard shortcuts
Although it's not in the same level as something like bug.n, Divvy does support the use of keyboard shortcuts to move windows about. You can even create custom shortcuts.
Pro Requires virtually no configuration & is very easy to use
Divvy uses a drop and drag style UI that's simple to use and doesn't require any setup or configuration to get started.
Pro Reasonably configurable
You can change the grid dimensions and a very other visual settings to suit your needs.
Pro Super-fast access by defining your own hot key (mine Win+S)
Pro It's slick, quick, and does the trick…
Mosaic is probably the best window manager I have ever used for Mac. There are so many options available, you're sure to be able to set it up to suit your workflow… and the Mosaic Remote app gives Touchbar like control, without a Touchbar!
Pro Stays out of the way
While still allowing for insane customization.
Cons
Con Quite inconvenient to assign windows
You always have to use the mouse instead of having proper keyboard shortcuts.
Con No longer updated
While this may work for current machines, the last beta version (to be found on the site) is from January 2016.
Developer's twitter account has stopped being active as well, on November '16.
Con Windows 10 buggy
Not all keyboard shortcuts work. Support is non existent.
Con Installer requires admin rights, installs itself to AppData of the used account
Something to consider if would be used in a restricted environment.
Con Not free
Costs $14.