Viair - Air Lift

Are Viair and Air Lift the same company?

More importantly, is a Viair 400C and an Air Lift 400C the same compressors?

No, they are not the same company.
VIAIR does build privately labeled compressors for Air Lift however.

Other than who handles the warranty, a VIAIR 400C and an Air Lift model 23400 are the same compressor.

what about those black/silver firestone compressors? they look exactly like some Viair comps but with different paint jobs.

Only a few models, but VIAIR does privately label compressors for Firestone as well.

ah, that explains the uncanny similarity of some firestone comps. thanks for the info!