I'm an Enpass use since the very early days. Passed from Blackberry to Windows Phone to Android. I've used Onedrive, Gdrive, Dropbox and finally Box as sync service. Would you Consider a cloudsync to a non US based cloud service as Jottacloud?
I'm considering an owncloud solution, but sync to e.g. Jottacloud would be great to.
Apparently there is an API: https://github.com/havardgulldahl/jottalib
Rgrds.
Jurgen