I manage a shard hosting with WHM/Cpanel on a Hetzner server. I've been using Backblaze B2 for hosting full backups but I looking for a cheaper option. Which alternatives should I consider for this service? I use jetbackub.
Aside from what you have now, Acronis is another option for shared hosting.
Backblaze B2 is already very cheap, alternative option is Wasabi.They charge about $6 per TB each month and don’t bill you for downloads (no egress fees). InterServer also offers simple storage: $5/month for 1TB or $10/month for 4TB, with FTP access for backups.