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OpenSIPS

MEETINGS
Velocity0.0

Open source SIP server and proxy for voice, video and real-time communications

opensips.org ↗

OpenSIPS 4.0 is in release-candidate testing, with two RCs a month apart.

sipvoipmajor-releaserelease-candidatetelephony
◆Current state
OpenSIPS, the open-source SIP proxy and server, has two tracked entries: 4.0.0-rc1 in May and 4.0.0-rc2 in June 2026. Both release notes are one-line announcements, so the specific 4.0 changes are not visible in the feed.
◆Where it's heading
The product is moving toward a 4.0 major release through a standard RC cycle. A second RC a month after the first suggests stabilization work rather than new scope, but the entries do not say what 4.0 changes.
◆Prediction
A 4.0.0 general release is the next expected step; what it contains cannot be read from these announcements.

◆Recent moves

  1. 3mo ago

    OpenSIPS 4.0 release candidate 2

    The second 4.0 release candidate, a month after rc1. It moves the major version closer to general availability, and is likely a stabilization pass since the notes list nothing new.

    View source ↗
  2. 4mo ago

    OpenSIPS 4.0 enters release-candidate testing

    The first public release candidate of OpenSIPS 4.0 opens the major version to testing. The announcement gives no details, so the size of the 4.0 changes is still unclear.

    View source ↗