I am using Playfab with the Chadori plugins, the plugins simplify the interface and are well supported. The plugin is a paid plugin, here's the thread:
That being said, I have been using CapRover on a Digital Ocean droplet for some game server side development, they actually have a one click deploy for a parse server. I tried it and it seems to work. Of course then you will have to manage/configure a parse server which is probably a lot more work! I also have not seen a Construct 3 parse plugin (it looks like the C2 versions have not been ported.) That being said, C3 now has integrated scripting support, so it will be relatively easy to use the JS SDK in C3.
A bit of a random post, but some options.