rtpengine
rtpengine backports the same DTLS and socket fixes across four maintenance branches at once.
Comparison · Meetings
Greenlight vs OpenSIPS
A side-by-side editorial comparison of Greenlight and OpenSIPS — release velocity, themes, recent moves, and the top alternatives to consider.
Greenlight vs OpenSIPS: at a glance
What is Greenlight?
Greenlight 3.9 makes URL_HOST mandatory, forcing admin action on every self-hosted deployment.
Greenlight, the BigBlueButton web frontend, is in a security-maintenance phase. The 3.8.x series was dominated by gem updates and language patches; 3.9.0 introduces multiple undisclosed security fixes alongside a breaking change that requires URL_HOST to be set in .env or the application will refuse to start. A follow-up hotfix landed hours later to address a startup crash introduced in the release.
What is OpenSIPS?
OpenSIPS 4.0 is in release-candidate testing, with two RCs a month apart.
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.
Greenlight vs OpenSIPS: editorial side-by-side
Greenlight
5.0MEETINGS
Greenlight 3.9 makes URL_HOST mandatory, forcing admin action on every self-hosted deployment.
◆ Current state
Greenlight, the BigBlueButton web frontend, is in a security-maintenance phase. The 3.8.x series was dominated by gem updates and language patches; 3.9.0 introduces multiple undisclosed security fixes alongside a breaking change that requires URL_HOST to be set in .env or the application will refuse to start. A follow-up hotfix landed hours later to address a startup crash introduced in the release.
◆ Where it's heading
Greenlight's release cadence is maintenance-driven: security response and dependency updates rather than feature work. The 3.9.0 breaking change is the project tightening deployment requirements, likely in response to misconfiguration risks identified in security audits. The rapid hotfix points to limited pre-release testing capacity on the project.
◆ Prediction
The undisclosed 3.9.0 security fixes will be disclosed within weeks and likely explain the URL_HOST mandate — deployments without it were probably vulnerable to host header injection or similar configuration-dependent attacks.
OpenSIPS
0.0MEETINGS
OpenSIPS 4.0 is in release-candidate testing, with two RCs a month apart.
◆ 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.
Alternatives to Greenlight and OpenSIPS
Other Meetings products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either Greenlight or OpenSIPS.
coturn
coturn ships three minor versions in six weeks, packaged as Docker images on three registries.
Kamailio
Kamailio's tracked feed shows one thing: a quiet, schema-stable 5.8 maintenance release.
JW Player
JW Player is rebuilding its VOD pipeline around CMAF, one workflow fix at a time
Restream
Restream's webinars get a registration page and a CSV of leads, turning broadcasts into a pipeline
BigBlueButton
BigBlueButton 4.0 rc.4 is a security-only release as the LiveKit stack hardens.
See all Greenlight alternatives → · See all OpenSIPS alternatives →
Recent activity from Greenlight and OpenSIPS
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 24d agoGreenlightGreenlight 3.9.0.1: startup crash hotfix
- 24d agoGreenlightGreenlight 3.9.0: mandatory URL_HOST and undisclosed security fixes
- 2mo agoGreenlightGreenlight 3.8.2.4: security gem updates
- 3mo agoOpenSIPSOpenSIPS 4.0 release candidate 2
- 4mo agoOpenSIPSOpenSIPS 4.0 enters release-candidate testing
- 4mo agoGreenlightGreenlight 3.8.2.3: security updates and translations
- 5mo agoGreenlightGreenlight 3.8.2.2: HTML support in maintenance banner
- 5mo agoGreenlightGreenlight 3.8.2.1: host configuration bypass option
Frequently asked questions
What is the difference between Greenlight and OpenSIPS?
They serve adjacent needs but don't currently overlap on shipped themes. Greenlight is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Greenlight better than OpenSIPS?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Greenlight is currently shipping more aggressively (velocity 5.0 vs 0.0), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Meetings products to evaluate alongside.
What are the best alternatives to Greenlight?
Top Greenlight alternatives in Meetings are ranked by recent ship velocity. Browse the "Greenlight alternatives" section above for the current picks, or visit /alternatives/greenlight for the full list with editorial commentary on each.
What are the best alternatives to OpenSIPS?
Top OpenSIPS alternatives in Meetings are ranked by recent ship velocity. Browse the "OpenSIPS alternatives" section above for the current picks, or visit /alternatives/opensips for the full list with editorial commentary on each.