Both. Umbrel is just a bitcoin node and public pool for bitaxes. Start9 is also a node, lightning node, and other fun things!

I have an umbrel, love it, basically a user friendly NAS based on Docker. Instead of mungling around with the correct configuration, use the one provided by the app dev instead, easily manage dependencies with each other. Easiest way to have a working Bitcoin node + lightning configuration. can also be your media server, or any sort of things. I'm incredibly bullish on Umbrel, such a great OSS project