However, for a company, there are a lot of missing features, so definitely take some time to evaluate it first to make sure it's a fit. For example searching chat history (something we miss a great deal, but can live without). Also, the permissions are horrendously complicated and the fact that you can't remove or lock down the "public" room is super annoying.

That being said, we're still using it and pretty happy. It probably doesn't measure up too well against Slack if you don't value the group voice channels.

Just saw the threaded discussions feature for Zulip from a thread in here. Wow, that would be killer.

Although the permission system may be something that's complicated, it fits the gamer clan niche well. A lot of people actually have been requesting that we add more complex permission hierarchies.

It'd also be nice to make it clearer whether someone can view a specific channel or not (eg see it in the list).

Oh and... IRC gateway? :) Or at least open spec on the protocol, pretty please.

1) offline mode

2) different names for each server

Do you guys have retention policy settings and are able to handle something like 7000 member rooms for announcements?

Our product focus is on making VOIP the best it can for gamers/gaming communities. Definitely not huge enterprises!

However, 7000 member rooms for announcements? No sweat. We've had @everyone notifications targeted at upwards of 20,000+ users at once in a single server. I actually wrote the code that handles that. Lots of streamers, game developers and stuff actually use discord for announcements. One of the bigger ones in my recent memory was the Star Citizen PTU server, the devs used it for chat + announcements.