Bitwig often provides a slimmed-down version called through various official partnerships. These are perpetual licenses that allow you to save and export projects.
Even after the trial ends, you can continue using Bitwig in "Demo Mode," which allows you to use all features but disables saving and exporting projects. 2. Free Bitwig Studio 8-Track Licenses
Many MIDI controllers and audio interfaces (such as those from Antelope Audio or ESI) include a free Bitwig 8-Track serial key in the box.
Instead, there are several to use Bitwig Studio at no cost or through official promotions: 1. Official 30-Day Free Trial