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Windows 5.2.4 [35] BSD Mattermost: Mattermost Inc 2015; 10 years ago () Android Apache-2.0: MIT license binary, AGPLv3 for source code, Apache-2.0 for admin tools and config files iOS Linux macOS Windows Messenger: Meta Platforms: August 9, 2011; 13 years ago () Android 431.1.0.35.116 [36] 2023-10-24 Proprietary freeware: Proprietary
Element (formerly Riot and Vector [13]) is a free and open-source software instant messaging client implementing the Matrix protocol. [14]Element supports end-to-end encryption, [15] private and public groups, sharing of files between users, voice and video calls, and other collaborative features with help of bots and widgets.
Open standard @Username:Hostname (MXID) Yes Yes, mandatory Yes, default for private conversations [12] Yes Yes Yes Yes (using pluggable server-side filtering modules and contact ignoring) Yes Yes Yes Yes Yes No ? Matrix; Mattermost: Mattermost Inc 2015 October 2 Open standard? MSNP (Windows Live Messenger, etc.) Microsoft: 1999 Jul Proprietary
Signal is an open-source, encrypted messaging service for instant messaging, voice calls, and video calls. [14] [15] The instant messaging function includes sending text, voice notes, images, videos, and other files. [16]
The early Jabber community focused on open-source software, mainly the jabberd server, but its major outcome proved to be the development of the XMPP protocol. The Internet Engineering Task Force (IETF) formed an XMPP working group in 2002 to formalize the core protocols as an IETF instant messaging and presence technology.
FrontlineSMS is a free open source software used by a variety of organizations to distribute and collect information via text messaging . The software works without an internet connection and with a cell phone and computer.
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Free and open-source license [ edit ] A SIP server, also known as a SIP proxy, manages all SIP calls within a network and takes responsibility for receiving requests from user agents for the purpose of placing and terminating calls.