LANDR

LANDR lets you master all your tracks at once, work directly from your DAW and back-up your masters to the cloud as you work. LANDR's bulk upload feature lets you master single songs or entire folders at one. Mastering works in the background while you are creating, and the app will alert you when previews are ready. Drag-and-drop DAW mastering makes sharing tracks and working remotely with collaborators easier. Cloud back-ups give you access to your tracks anywhere, anytime. Choose your format. Get MP3's for sharing, WAVs for releases or go unlimited and get it all.

A LANDR account is required. A free account is available, with 2 LO-Res MP3s per month and private sharing (for a limited time). Full access is $25/mo or $299/yr as per LANDR pricing information.