Based on our record, ejabberd should be more popular than Tigase. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
"Best" is relative but to add to other voices maybe try also looking at Tigase XMPP Server (https://tigase.net/, https://github.com/tigase/tigase-server)? Source: over 2 years ago
Also a fan of XMPP, ejabberd.im is a formidable piece of software that pretty much just works once you have it all set up and configured. Source: over 2 years ago
It supports voice and video calls, and you use it on your own server (like prosody.im and ejabberd.im). It's also really simple to get a user to create an account on a server you run/a public one and.... It does not require a phone number or an email address. Source: about 3 years ago
Prosody - Prosody is a modern flexible communications server for Jabber/XMPP written in Lua.
Openfire - Openfire (formerly Wildfire) is a cross-platform instant messaging (IM) and groupchat server.
Apache Vysper - Apache Vysper aims to be a modular, full featured XMPP (Jabber) server.
Matrix.org - Matrix is an open standard for decentralized persistent communication over IP.
MongooseIM platform - The massively-scalable XMPPJabber mobile messaging platform, for mobile and web, by Erlang Solutions
ejabberd SaaS - Realtime XMPP and MQTT Software and Infrastructure as a Service.