Flatpak

Snap is the Ubuntu equivalent of Flatpak, packaged with Ubuntu straight from Canonical. It is less open of a platform (the community is limited to Ubuntu users, and Canonical controls the repositories) and startup times are usually slower than Flatpaks as well.

Because of those drawbacks, many Ubuntu desktop users prefer to remove Snap entirely, and replace it with Flatpak. We recommend this as well, as it will allow your Ubuntu system access to a wider library of Linux applications than you would normally get with Snap. This is done with the Github package popey/unsnap. There is a writeup about this at FOSSlife that explains this further.