No longer listed on the Qubes website's certification page?

[amosbatto]

@michael.qubes

that reduces the list to System76 and Star Labs (didn’t know about Star Labs, thanks for sharing).

I didn’t realize that Star Labs now offers Coreboot. That is good news. TUXEDO Computers and Slimbook say on their websites that they intend to do Coreboot ports for their devices, so you may want to contact them as well.