All the ones I've been finding either have an inactive/small community or a pay structure.
Submitted January 28, 2017 at 02:26PM by Oscinian https://www.reddit.com/r/edmproduction/comments/5qooea/any_good_platforms_online_to_collaborate_on_tracks/?utm_source=ifttt
Javier Rodriguez
Saturday, January 28, 2017