Mosquitto vs XMPP: What are the differences?

Mosquitto: An open source message broker that implements the MQTT protocol. It is lightweight and is suitable for use on all devices from low power single board computers to full servers.. The MQTT protocol provides a lightweight method of carrying out messaging using a publish/subscribe model. This makes it suitable for Internet of Things messaging such as with low power sensors or mobile devices such as phones, embedded computers or microcontrollers; XMPP: An open XML technology for real-time communication. It is a set of open technologies for instant messaging, presence, multi-party chat, voice and video calls, collaboration, lightweight middleware, content syndication, and generalized routing of XML data.

Mosquitto and XMPP are primarily classified as "Message Queue" and "Container" tools respectively.

Mosquitto is an open source tool with 2.81K GitHub stars and 980 GitHub forks. Here's a link to Mosquitto's open source repository on GitHub.

Teleolabs, Cedalo AG, and Xanview Ltd are some of the popular companies that use Mosquitto, whereas XMPP is used by Mendix, Vidyo.io, and Relayo. Mosquitto has a broader approval, being mentioned in 5 company stacks & 14 developers stacks; compared to XMPP, which is listed in 7 company stacks and 5 developer stacks.