Ok I'm not sure I understand the issue here. I'm not an Android whiz but I thought FCM was inherently invasive, so if I ran Zulip from a security and privacy p

Ok I'm not sure I understand the issue here. I'm not an Android whiz but I thought FCM was inherently invasive, so if I ran Zulip from a security and privacy perspective, I'd want to self-host it including running my own notification server. It doesn't bother me at all if Zulip charges people to use their hosted plans, and I'm suspicious of the existence of a gratis one ("if you're not the customer..."). I guess though that an openpush/unifiedpush(?) client is another thing to install on the phone though. I probably care more about the web version than the mobile apps. I've been using nextcloud talk but it's kind of awful.