https://disband.io/

A stem splitter I built. Upload a song and get vocals (lead and backing), instrumental, drums, bass, guitar, piano, or even the drums split into kick, snare, toms, hi-hat and the rest. You pay per minute of audio with credits (while also being cheaper than other competitors), and there's a free daily allowance (with an account, I don't want it to be abused), and downloads/stems aren't locked behind a paid tier. You can listen to the example on the landing page if you don't want to sign up yet. There's also a pretty easy-to-use API, if you want to integrate it with your own tools. You also don't have to know anything at all about the underlying models either, because there's no complicated list to pick from.

And no, it's not just an HTDemucs wrapper, it runs the current top open models with some tuning on top. Any feedback is appreciated!