List of mechanical keyboard and macro pad manufacturers

Mechanical keyboard manufacturers:
Cooler Master
Corsair
SteelSeries
Logitech
Gigabyte Technology
MSI
ASUS
Thermaltake
Primus gaming
Red Dragon
Das keyboard
Dygma Raise
Wooting
Cougar
Ducky
Millenial Engineers
Unicomp

keychron

Macro Pad manufacturers:
elgato-Stream Deck
Techkeys

(Osu! Nono Keyboard, not a manufacturer)

Keycap makers:
Tai-Hao
Ducky

Some mechanical switch manufacturers:
Razer
Cherry
Logitech
Matias (Alps clone)
Topre
Kalih
Omron