“Self-hosting is the activity of owning and administrating your own server, typically at home, to host your personal data and services yourself instead of relying exclusively on third-parties. For instance, you can self-host your blog, such that it ‘lives’ on a machine that you have control of, instead of having it on somebody else’s computer (a.k.a. FAANGS or The Cloud) in exchange for money, advertisement or private data.
Self-hosting implies owning a server. A server is a computer which is typically accessible on the network 24/7, and usually does not have any screen or keyboard (it is instead controlled remotely). Contrarily to a popular belief, a server is not necessarily a huge and extra-powerful machine: nowadays, a small, ~$30 ARM board is adequate for self-hosting.”
https://doc.yunohost.org/admin/about_self_hosting
“YunoHost has been around since 2012 and is essentially developed on a voluntary basis and outside the commercial sector.
YunoHost is a modest project in terms of the resources it mobilizes – yet an ambitious one, as much for its activism as for its technical and interface design, as well as for the required perseverance to package and maintain the hundreds of applications in our catalog.”

