Comment by russmck

Both Portainer and Shipyard currently occupy the same space. While there is no Docker Compose support at the moment, however, you can add customisable templates, see https://portainer.readthedocs.io/en/stable/templates.html for more info.

Also, they do eventually plan for Portainer to compete with Rancher https://twitter.com/portainerio/status/814542425410576386