There are many VPN services that begin by reselling white-label VPN solutions, such as provided by NordVPN,[1] because it's cheaper and easier than building your own globally distributed high-capacity, low-latency network. Many suspect Proton VPN did so[2].
[1]https://nordvpn.com/white-label/ (old link, can't find an archived version of the page) [2]https://archive.is/iZ2l2
Even though, to me, it seems like a LOT of trouble since tons of services have managed to roll out a VPN product without resorting to white labelling Nordvpn
I would like to reiterate that this is completely untrue and borders on disinformation.
ProtonVPN maintains its own VPN infrastructure, and we take our commitment to user privacy very seriously.
It shouldn’t be surprising that the VPN space is a very competitive market, and certain people have a vested interest in defaming certain VPN providers, especially among a technical audience.