Greetech and Kaihua partnered with Razer to produce custom switches. The exact timeline of those partnerships is not known, but Greetech appears to be their current vendor.
The Kaihua version showcases a force curve that is very similar to Cherry MX Blues, though the upstroke (orange line) force drop off is significantly reduced.
Our switch inspection indicates that Razer may have asked Kaihua to use cheaper materials as a cost cutting measure, but this has not been verified by a third party.
Razer Green Mechanical Switches info 2017-09-23T10:56:09+00:00