One that doesn't need some form of 'login', 'account', or client. While this site seems to be the well intentioned and not shady, technically it offers nothing

One that doesn't need some form of 'login', 'account', or client. While this site seems to be the well intentioned and not shady, technically it offers nothing more than what https://mullvad.net/en/help/dns-over-https-and-dns-over-tls https://mullvad.net/en/help/dns-over-https-and-dns-over-tls as a free to use for all byproduct of their other offerings. It just has better presentation, and maybe finer granularity via their client? Who knows? In practice it isn't needed.