rtpengine
rtpengine backports the same DTLS and socket fixes across four maintenance branches at once.
Comparison · Meetings
BigBlueButton vs OpenSIPS
A side-by-side editorial comparison of BigBlueButton and OpenSIPS — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:release-candidate
BigBlueButton vs OpenSIPS: at a glance
What is BigBlueButton?
BigBlueButton 4.0 rc.4 is a security-only release as the LiveKit stack hardens.
BigBlueButton 4.0.0-rc.4 contains security fixes only, including a command injection through destination_number, unauthenticated access to a meeting's audio conference and shared notes reachable by non-members. It follows rc.2, also security-only, and rc.3, which focused on LiveKit reconnection and test stability. The project still recommends 3.0.x for production.
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.
BigBlueButton vs OpenSIPS: editorial side-by-side
BigBlueButton
5.0MEETINGS
BigBlueButton 4.0 rc.4 is a security-only release as the LiveKit stack hardens.
◆ Current state
BigBlueButton 4.0.0-rc.4 contains security fixes only, including a command injection through destination_number, unauthenticated access to a meeting's audio conference and shared notes reachable by non-members. It follows rc.2, also security-only, and rc.3, which focused on LiveKit reconnection and test stability. The project still recommends 3.0.x for production.
◆ Where it's heading
The 4.0 cycle has moved from architecture (LiveKit as the only media path, BlockNote notes, Java 21) to hardening. Two security-only candidates in a month show the new LiveKit audio and notes surfaces are getting close scrutiny before GA.
◆ Prediction
Expect 4.0.0 GA once the release-candidate cadence quiets, likely preceded by at least one more rc. The steady flow of advisories makes the exact timing unclear.
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 BigBlueButton 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 BigBlueButton 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
Fourwaves
Fourwaves is polishing participant messaging after a pricing reset.
See all BigBlueButton alternatives → · See all OpenSIPS alternatives →
Recent activity from BigBlueButton and OpenSIPS
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoBigBlueButtonBigBlueButton 4.0 rc.4 patches audio and notes security flaws
- 22d agoBigBlueButtonBigBlueButton 4.0 rc.3 hardens LiveKit reconnection
- 23d agoBigBlueButtonBigBlueButton 4.0 rc.2 fixes cross-meeting security flaws
- 1mo agoBigBlueButtonBigBlueButton 4.0 rc.1 completes the LiveKit audio migration ⚡
- 1mo agoBigBlueButtonBigBlueButton 4.0 beta.5 overhauls mobile layout
- 2mo agoBigBlueButtonBigBlueButton 4.0.0-beta.4 ⚡
- 3mo agoOpenSIPSOpenSIPS 4.0 release candidate 2
- 4mo agoOpenSIPSOpenSIPS 4.0 enters release-candidate testing
Frequently asked questions
What is the difference between BigBlueButton and OpenSIPS?
Both compete on the same themes — release-candidate — within Meetings. BigBlueButton 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 BigBlueButton better than OpenSIPS?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. BigBlueButton 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 BigBlueButton?
Top BigBlueButton alternatives in Meetings are ranked by recent ship velocity. Browse the "BigBlueButton alternatives" section above for the current picks, or visit /alternatives/bigbluebutton 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.