Backup improvements are planned and under investigation. The only major issues with backups for non DB containers is that they need to be stopped to ensure data integrity. We are investigating some filesystem level snapshots, but not sure yet.
Coolify Cloud lets you connect your own servers in pretty much 1 click and then just deploy resources, you do not need to worry about upgrading Coolify, instance backups and so on, we manage all that for you.
Yes, Coolify is completely open source and all features are completely free - the cloud and self-hosted versions are completely the same and the hosting is pretty simple.
We are also working on backups. The only big problem with backups for non DB Containers is that they need to be stopped to ensure data consistency, so we are looking at some filesystem level options but not sure yet.
This is true for most alternatives, but not for Coolify.
I am the second maintainer of Coolify and Andras and I maintain most of Core Coolify while we have 4 other maintainers helping with support and the docs and a few other maintainers who help with CLI and some other stuff.