Two formerly popular cheap options are no longer viable for new users: ZBrush Plan Options - Maxon
First, a eulogy. Before 2021, ZBrush offered a for roughly $895. While not "cheap," it was a one-time investment. "Cheap" back then meant buying a used license (legal) or an educational license (discounted ~$100). zbrush cheap license
No, it is discounted (approx $179), not free. However, many schools include it in their lab fees, so check your university’s computer lab. Two formerly popular cheap options are no longer