Apartments? Businesses? Yeah, Chamberlain only sells garage door openers BUT Chamberlain Group[0] owns Chamberlain, LiftMaster, Merlin, and Grifco (I think they missed a "t" there).

Literally the bottom of the Chamberlain website reads

> The Chamberlain Group LLC, the corporate parent company to LiftMaster, Chamberlain, Merlin and Grifco, is a global leader in access solutions and products. __We design and engineer residential garage door openers, commercial door operators and gate entry systems.__

[0] https://chamberlaingroup.com/