Currently the free functionality (no subscription required) is:
And the paid functionality (subscription required) is:
-Access to and use of a growing library of cloud actions
-All app updates, including major ones, provided automatically
-Amazon S3 Uploading
-Google Drive uploading
-Key triggers for actions
-Service hotkey to run action
-Developing your own actions
Or if you have a Setapp subscription then you can also get Dropzone 4 on there with all free and premium features above unlocked.
Hope that helps!