coturn
coturn ships three minor versions in six weeks, packaged as Docker images on three registries.
Comparison · Meetings
Greenlight vs rtpengine
A side-by-side editorial comparison of Greenlight and rtpengine — release velocity, themes, recent moves, and the top alternatives to consider.
Greenlight vs rtpengine: 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 rtpengine?
rtpengine backports the same DTLS and socket fixes across four maintenance branches at once.
Sipwise's rtpengine media proxy is maintaining several release lines in parallel (mr13.5, mr14.1, mr26.0, mr26.1, mr26.2), and most recent entries are coordinated backports. The September 16 batch fixes hash-table updates, nested string lookups and stop_forwarding mixups across four branches, and adds DTLS negotiation corrections (setup=actpass logic, ignoring incorrect DTLS=passive, keeping TLS IDs on answer role changes) to the mr26.0 and mr26.1 lines.
Greenlight vs rtpengine: 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.
rtpengine
5.0MEETINGS
rtpengine backports the same DTLS and socket fixes across four maintenance branches at once.
◆ Current state
Sipwise's rtpengine media proxy is maintaining several release lines in parallel (mr13.5, mr14.1, mr26.0, mr26.1, mr26.2), and most recent entries are coordinated backports. The September 16 batch fixes hash-table updates, nested string lookups and stop_forwarding mixups across four branches, and adds DTLS negotiation corrections (setup=actpass logic, ignoring incorrect DTLS=passive, keeping TLS IDs on answer role changes) to the mr26.0 and mr26.1 lines.
◆ Where it's heading
The work is focused on correctness in media negotiation, especially DTLS role handling and ICE on closed sockets, rather than new features. The newest branch, mr26.2, also brought AMR fmtp defaults, mirroring of generated RTCP sender reports to Homer, and recording cleanup hardening, which points to better interop and observability for carrier deployments.
◆ Prediction
More synchronized backport releases across the mr13.5 through mr26.2 lines are the clear pattern; feature work will most likely keep landing on mr26.2 first.
Alternatives to Greenlight and rtpengine
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 rtpengine.
OpenSIPS
OpenSIPS 4.0 is in release-candidate testing, with two RCs a month apart.
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 rtpengine alternatives →
Recent activity from Greenlight and rtpengine
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 16d agortpenginertpengine mr13.5.1.27: mux-offer fix when required
- 17d agortpenginertpengine mr26.0.1.23: DTLS negotiation and forwarding fixes
- 17d agortpenginertpengine mr13.5.1.26: forwarding and socket bug fixes
- 17d agortpenginertpengine mr26.2.1.2: core lookup and forwarding fixes
- 17d agortpenginertpengine mr26.1.1.11: DTLS negotiation and forwarding fixes
- 24d agoGreenlightGreenlight 3.9.0.1: startup crash hotfix
- 24d agoGreenlightGreenlight 3.9.0: mandatory URL_HOST and undisclosed security fixes
- 1mo agortpenginertpengine mr26.2.1.1: Homer RTCP mirroring, AMR defaults, recording fixes
- 2mo agoGreenlightGreenlight 3.8.2.4: security gem updates
- 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 rtpengine?
They serve adjacent needs but don't currently overlap on shipped themes. Greenlight and rtpengine are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Greenlight better than rtpengine?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Greenlight and rtpengine are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). 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 rtpengine?
Top rtpengine alternatives in Meetings are ranked by recent ship velocity. Browse the "rtpengine alternatives" section above for the current picks, or visit /alternatives/rtpengine for the full list with editorial commentary on each.