This is a free, open-source desktop application that many consider to be as good as (or better than) LALAL.AI. It runs locally on your hardware, so there are no credits or activation keys required.
If the cost of LALAL.AI is a barrier, there are legal and safe ways to get high-quality stem separation:
Searching for a is generally a losing game. You are more likely to infect your computer with a virus than you are to get free audio processing. If you need pro-level results for free, your best bet is to skip the cracks and download an open-source alternative like Ultimate Vocal Remover 5 .
