Develops and maintains the XMPP standard for instant messaging and voice and video calls. It’s a free open federated standard, so anyone can set up their own server or write their own app. (XMPP used to be known as Jabber.)
Fediverse address:
@xmpp@fosstodon.org
Private company which develops free open software for instant messaging through XMPP. They have a number of XMPP projects including server software and apps for MacOS (Beagle), iOS (Siskin) and Android (Stork).
Fediverse address:
@tigase@fosstodon.org
Free open source XMPP desktop app for Linux, Mac and Windows. Includes OMEMO end-to-end encryption support.
Fediverse address:
@gajim@fosstodon.org
Informal collective promoting the use of XMPP/Jabber messaging. They run a non-technical website, also called JoinJabber, which helps people sign up on XMPP and includes advice on apps and servers.
Fediverse address:
@joinjabber@indieweb.social
A co-operative organisation creating Go-based resources for the XMPP instant messaging protocol.
Fediverse address:
@mellium@fosstodon.org
Free open source software for running XMPP instant messaging servers, and one of the most popular ways to set up an XMPP server.
Fediverse address:
@prosodyim@fosstodon.org
Free open source encrypted XMPP app for Android produced alongside a member-funded XMPP service, currently in private beta testing. Developed and run by a co-operative based in India.
Fediverse address:
@prav@venera.social
The popular free open source desktop email app, available for Linux, Mac and Windows. As well as email, it also works as an RSS news reader, XMPP client and IRC client.
Fediverse account (main):
@thunderbird@mastodon.online
Fediverse account (videos):
@thunderbird@tilvids.com
Free open source XMPP/Jabber app for Linux which includes support for end to end encrypted messaging, voice/video calls and conferencing.
Fediverse address:
@dino@fosstodon.org
Free open source XMPP messenger app for iPhone, iPad and Mac. It includes support for OMEMO end-to-end encryption.
Fediverse address:
@Monal@fosstodon.org
Free open source XMPP app for Linux and Android, and part of the KDE project. Includes OMEMO support for end-to-end encryption.
Fediverse address:
@kaidan@fosstodon.org
XMPP-based free open federated messenger project. It aims to make XMPP into a more viable alternative to Whatsapp etc by providing consistency in design and terminology, while still maintaining compatibility with other XMPP apps and servers. (It’s a similar plan to how Mastodon made ActivityPub more mainstream while still being compatible with other ActivityPub server types.)
Fediverse address:
@snikket_im@fosstodon.org
Website featuring a curated list of XMPP instances organised into categories based on the quality and type of services offered.
Fediverse address:
@xmpp_providers@fosstodon.org