Is anyone still looking for alternatives? These sites can publish 360 panoramas:
360 Cities
iStaging
Facebook
YouTube
360 cities, Facebook and YouTube are very rudimentary and can only show an image at a time.
I couldn’t upload to RoundMe either and had to use iStaging. It’s very similar and can be viewed on mobile devices, the only drawback is that you might need to get a paid membership.
Then there’s the option of hosting your own tours on a website (Lapentor seems nice)
This is not an ad, I’m just trying to help people find alternative platforms.