Comment by zeveb

> Would be really interesting if one could program a secure way for the individually hosted servers to hook up with each other and verify the correctness of one another while at the same time keeping the messages secure (I guess bitcoins come to mind here..).

You don't need a blockchain for that! Looking at the docs, it looks like Zulip messages are visible to servers anyway; that means that there's no need to encrypt the messages to hide them from the servers.

Now, supporting end-to-end encryption for chat would be pretty cool, but it's not going to happen in a browser client (since browser clients are currently completely at the mercy of servers, and will be so for the foreseeable future).