Matrix might suit your needs, it's very popular on here. It's decentralised, free open source software.
You can follow them on here at @matrix and there's more info at https://matrix.org
-replaces Facebook:
-Diaspora: https://diasporafoundation.org/
-Aardwolf (alpha?): https://aardwolf.social/
-Patchwork/SSB: https://www.scuttlebutt.nz/
-replaces Instagram:
-Lychee (Self-hosted only/not federated):
https://lychee.electerious.com/
-quit.im: https://quit.im/
-replaces WhatsApp:
-Matrix: https://matrix.org/
-Signal: https://signal.org/
-Jitsi: https://jitsi.org/
-IRC(Self-hosted only/not federated)
Chirp! is a social network. It runs on GNU social, version 2.0.1-beta0, available under the GNU Affero General Public License.
All Chirp! content and data are available under the Creative Commons Attribution 3.0 license.