I heard Tuta/Mullvad are quantum-resistant end-to-end encrypted and that Mullvad VPN is better at avoiding trigging captcha.
While Proton services are hosted in Switzerland which has the strongest privacy laws in the world and avoids the surveillance of NATO.
Well, all the quantum stuff is more marketing than anything else. I think it’s snake-oil. All the big VPN services use encyption that’s itself unbreakable.
And as far as I know NATO is a military alliance. Their main job is to do military operations, like navy maneuvers and assure no member country gets attacked. I don’t think they do much domestic surveillance of citizens, as they’re not an intelligence agency.
As far as I know all of those three services are reputable.