If you are a Standard user, Soundful retains ownership of the tracks you generate. You are allowed to use your tracks for non-commercial personal use.
If you are a Premium subscriber, Soundful retains ownership of the tracks you generate. You are allowed to use your tracks for commercial use under the Music Creator License (see License page).
If you are a Pro subscriber, Soundful retains ownership of the tracks you generate, unless you modify the track to make it your own (e.g. via modifying the STEMS). You are allowed to use your tracks for commercial use under the Music Creator License (see License page).
If you are a Business subscriber, you own the tracks you generate. You are allowed to use your tracks for commercial use under the Business License (see License page).