You may be looking for a non-profit hosting provider with a sustainable economic model, that has more chances of being up and running 20 years from now. Or you rather need a server that offers anonymous access via the Tor network? Here are some recommended options:
XMPP.social is one of several domains you can register for free with Hookipa.net. Their servers are located in Germany.
Disroot is a non-commercial project based in the Netherlands and founded in 2015. It is run by a group of volunteers and offers various online services. You can learn more about them on their website here.