Category
page 1Instant messaging protocols
XMPP
Extensible Messaging and Presence Protocol (abbreviation XMPP, originally named Jabber) is an open communication protocol designed for instant messaging (IM), presence information, and contact list maintenance. Based on XML (Extensible Markup Language), it enables the near-real-time exchange of structured data between two or more network entities. Designed to be extensible, the protocol offers a multitude of applications beyond traditional IM in the broader realm of message-oriented middleware, including signalling for VoIP, video, file transfer, gaming and other uses.
Google Messages
messaging application developed by Google LLC

iMessage
iMessage is an instant messaging service which was developed by Apple and launched on October 12, 2011. iMessage functions exclusively on Apple platforms – including iOS, iPadOS, macOS, watchOS, and visionOS. iMessage uses the Messages app client.

Secure Internet Live Conferencing protocol
protocol that provides secure synchronous conferencing services
OSCAR protocol
instant messaging and presence information protocol
Microsoft Messenger service
Instant messaging service
Jingle
communications protocol
Microsoft Notification Protocol
instant messaging protocol by Microsoft
SIMPLE
computer instant messaging protocol
Zephyr
computer network protocol