Rc 2.1.0rc1 Available

<!-- .. title: Release candidate 2.1.0rc1 available .. slug: rc-2.1.0rc1-available .. date: 2026-01-16 16:21:42 UTC .. tags: Releases .. category: .. link: .. description: .. type: text -->

The first release candidate for Mosquitto 2.1.0 is now available for testing. If no release critical issues are reported, this will become 2.1.0 on 2026-01-26.

The source and binary packages are available:

• Source
• Windows 64-bit
• Windows 32-bit
• Debian (amd64, armhf) (note: the final release version will be available in the normal repository)
• Ubuntu (amd64) (note: the final release version will be available in the normal repository)
• Snap (amd64): snap refresh --edge mosquitto or snap install --edge mosquitto