update descr of Zulip

diff --git a/doc/zephyr.mdwn b/doc/zephyr.mdwn
index de88f2363cc839f923fefea1e13a9ec77c454223..7ddbfac73de7b7d634f1b08b8b3a24ac8461409b 100644 (file)
--- a/doc/zephyr.mdwn
+++ b/doc/zephyr.mdwn
@@ -34,7 +34,8 @@ Roost makes use of [Webathena](https://webathena.mit.edu/) to keep you subscribe
 ### Zulip
 
 
-[Zulip](https://zulipchat.com/zephyr) ([source code](https://github.com/zulip/zulip)) is a web-based Zephyr client that also provides [mobile apps](https://zephyr.zulipchat.com/apps) for Android and iOS and desktop apps for Linux, Mac, and Windows. Zulip is developed by a company composed largely of MIT alums and SIPB members.
+[Zulip](https://zulipchat.com/zephyr) ([source code](https://github.com/zulip/zulip)) is a web-based Zephyr client that also provides [mobile apps](https://zephyr.zulipchat.com/apps) for Android and iOS and desktop apps for Linux, Mac, and Windows. Zulip was originally a proprietary product developed by a company composed largely of MIT alums and SIPB members. It was acquired by [Dropbox](https://www.dropbox.com/about) in 2014, and [released as open-source software](https://blogs.dropbox.com/tech/2015/09/open-sourcing-zulip-a-dropbox-hack-week-project/) a year later. The Zulip for Zephyr service is offered by [Tim Abbott](http://web.mit.edu/tabbott/www/) (MIT '06, SIPB member)'s Kandra Labs.
+
 Zulip, like Roost, is easy to set up because it uses Webathena for authentication.
 
 See [Zulip for MIT setup](http://zulipchat.com/zephyr) for details.