I'm interested in selfhosting, if possible, an equivelant to last.fm -- it would analyze the history of what I listen to, and provide me with recommendations, and listening history reports.
Aside, last.fm as a federated service would be quite interesting. It would be neat to add a federated social media aspect to it.
That's a fair point that I had not considered -- it's a shortcoming in the premise of my inquiry. I wonder if it's possible, if at all, to create any recommendation service that doesn't compromise on user privacy. It may not be, as it would require a user's history, which, given enough entries, can be used to identify them.
Its possible with anonymous data. But you do need other user's data. So it would need to somehow be not just self-hostee but also federated. With lots of dsts from other servers
You'll need some kind of database if you want recommendations... Listenbrainz's data is open, so you might find some self-hosted service that uses that database and local history for recomendations, but... why not just contributing your scrobbles to that awesome project?
They do require an email for signup, but IMO they are trustworthy and you can just use some anonymous email if it's important to you to really stay anonymous.