The alias software in proton is called nostr:nprofile1qqsrmfufv02rlszd5egvxzch9lrjm2aczkeq9m6qzshth6lp56392egpz4mhxue69uhkummnw3ezummcw3ezuer9wchshde3rf, and it's self hostable.  nostr:nprofile1qqsweycjgpfq37gq9zvfmrhqrvu4rkwkann6wxk0gzayugj932vc33gpz9mhxue69uhkummnw3ezuamfdejj7d2s2le for passwords is also self hostable & integrates easily with Simplelogin.