XMPP

Extensible Messaging and Presence Protocol is a communications protocol based on XML for real-time exchanging structured data (text, voice, video, data) between network entities.

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First released 1998
Developed by Jeremy Miller
Open-source Yes
Used by Google, LiveJournal, Juick

Interesting facts

Unlike commercial instant messaging systems such as AIM, ICQ, WLM and Yahoo, XMPP is a federated, extensible and open system. Anyone can open their own instant messaging server, register users on it and interact with other XMPP servers.

3

Development by Synergize.digital

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