Razer now produces their own switches. Admittedly they are incredibly Cherry-like, so that doesn't address your point about "innovation", which I assume here to mean "variation" or simply product diversity?
For that, take a look at the switches produced by Topre Corp: http://deskthority.net/wiki/Topre_switch
Re:In praise of the mechanical keyboard
by noamyoungerm on Tuesday April 07, 2015 @08:55AM
(#9333589)
30 years may have passed since the Model M was released, but typewriters have been in use for much longer. The fundamental structure of a keyboard is not new at all, and as such the mechanisms underlying the highest-quality keyboards can't have changed too much either.
Also, Cherry is the only major manufacturer of mechanical switches in mass produced keyboards.