https://listenbrainz.org/ is an open source scrobbler, with the advantage that it leverages the musicbrainz database and connects listens to artist and track IDs instead of names, avoiding duplicate confusion. You can keep last.fm and submit to both of you like.

This is what I have been using for so many years after I deleted/lost my last.fm account. It keeps working like little magical tool in the background.

I looked at libre.fm but I think all I ever saw was a waiting list.