We have a Matrix space for general discussion, support and announcements about Project Segfault over at #project-segfault:projectsegfau.lt.
We have an XMPP MUC for general discussion about Project Segfault over at #firstname.lastname@example.org.
Our primary email address is email@example.com. You can use this as a way to send feedback or other stuff to us if you don't have or don't want to make a Matrix account. When waiting for us to answer make sure to check your spam, since some email providers block non-popular domains.
We also have a PGP key which you can find on keys.openpgp.org.
You can contact individual members by using the links provided in the team page.