About -> Available Versions -> Version 4.0.x

OpenSIPS 4.0.0 is in beta release stage (no stable release yet). This version still requires more testing before becoming stable -- for production usage, see the currently available releases.

OpenSIPS 4.0 Overview - a glimpse into OpenSIPS 4.0 to see what this new release can do for you.

1.  OpenSIPS 4.0.0-rc2

Candidate release (see Changelog)
Release date: 17th of June 2026

2.  OpenSIPS 4.0.0-rc1

Candidate release (see Changelog)
Release date: 20th of May 2026

3.  OpenSIPS 4.0.0

Beta release
Release notes: full technical listing
Release date: June 2026Beta-Release date : 22nd of April 2026
Last-Release date : n\a