I have some experience with Zulip through the rust zulip server and I have to say as far as I can tell Zulip is the best choice for this kind of communities. T

I have some experience with Zulip through the rust zulip server and I have to say as far as I can tell Zulip is the best choice for this kind of communities. The threading model might not be the best choice for all use-cases, but for a open-source project related community its superb (IMHO).