Comment by lukax

Deezer also open-sourced their source separation library Spleeter [1][2] last year (submitted to ISMIR2019 [3]).

Deezer does not offer an official hosted service but there are unofficial services like Acapella Extractor [4], melody ml [5] and moises [6].

[1] https://news.ycombinator.com/item?id=21431071

[2] https://news.ycombinator.com/item?id=23228539

[3] http://archives.ismir.net/ismir2019/latebreaking/000036.pdf

[4] https://www.acapella-extractor.com/

[5] https://melody.ml/

[6] https://moises.ai/