Ya I use Loudr for digital distribution to most places & that works nicely. In addition to that I use Bandcamp, Steam (as mentioned above), & OverClocked Records. Each one has a slightly different purpose (ex. I have more direct/immediate control through Bandcamp).
Just a note, CD Baby either just did (or is about to) acquire Loudr’s traditional digital distribution. Loudr for the most part is only going to focus on covers.