I cannot find the font used in the monstercat logo anywhere else.

Montserrat  Suggested by dwalkers24 
Monoceros  Suggested by Daymarius 

Looks like https://fonts.google.com/specimen/Montserrat possibly bold.

Yeah, looks like Montserrat. But I think they modified the t's to have a flat tail instead of a curved tail.

But "t" is different
Most likely they just modified it for the logo