Comparison of instant messaging protocols

The following is a list of instant messaging protocols.

Open

• Internet Relay Chat (IRC)
• Jabber
• Lotus Sametime
• MUNDU Messenger
• PSYC
• Session Initiation Protocol
• SIMPLE
• Voice over IP (many protocols)
• Wireless Village
• Zephyr Notification Service
• MSN

Closed

• .NET Messenger Service
• OSCAR (AIM and ICQ)
• TOC protocol (AIM)
• YMSG (Yahoo! Messenger)
• Gadu-Gadu
• Gale
• Skype

See also

• Instant messenger
• Comparison of instant messaging protocols
• List of instant messengers
• Comparison of instant messengers
• Messaging OSID software interface definition for messaging systems