Matrix has a reputation for good chat features as well as security, but the consensus has been that it is quite heavy on resources, especially if you want to just host it from home for friends and family.
Conduit is still in early beta release and also does not have all the Matrix bells and whistles, but it has been engineered to be very easy to set up, and is efficient and lightweight. You can install it on a mini-computer like the Raspberry Pi to host Matrix for your family, friends or company.
As of 2021-09-01, Conduit is Beta, meaning you can join and participate in most Matrix rooms, but not all features are supported, and you might run into bugs from time to time. For example, E2EE verification over federation is not yet implemented.
See Famedly / Conduit
Conduit is a simple, fast and reliable chat server powered by Matrix https://conduit.rs