This article discusses software internally used by Apple.
Acquiring a copy without Apple's consent is illegal and may result in being scammed.
(latest known version)
Apple Chat, or simply Chat, is an internal Jabber/XMPP-based messaging app for iOS and macOS. It supports group chats (called Spaces) as well as individual chats. The app has four environments, Production, Development, UAT, and QA, the latter three requiring access to Apple's corporate VPN.