rtpengine
rtpengine backports the same DTLS and socket fixes across four maintenance branches at once.
Comparison · Meetings
Fourwaves vs OpenSIPS
A side-by-side editorial comparison of Fourwaves and OpenSIPS — release velocity, themes, recent moves, and the top alternatives to consider.
Fourwaves vs OpenSIPS: at a glance
What is Fourwaves?
Fourwaves is polishing participant messaging after a pricing reset.
Fourwaves ships small daily changes to its event and conference platform. The past two weeks focused on participant communication — direct-message alerts, richer discussion emails, a communication Preferences page — plus account-page and domain-settings cleanup.
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.
Fourwaves vs OpenSIPS: editorial side-by-side
Fourwaves
6.3MEETINGS
Fourwaves is polishing participant messaging after a pricing reset.
◆ Current state
Fourwaves ships small daily changes to its event and conference platform. The past two weeks focused on participant communication — direct-message alerts, richer discussion emails, a communication Preferences page — plus account-page and domain-settings cleanup.
◆ Where it's heading
The September 17 pricing change to yearly submission limits with unlimited events set the commercial frame; the product work since then makes ongoing participant engagement smoother. Direct messages are replacing older contact paths.
◆ Prediction
More notification and messaging controls for participants and organizers are likely, continuing the current run of small communication fixes.
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 Fourwaves 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 Fourwaves 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 Fourwaves alternatives → · See all OpenSIPS alternatives →
Recent activity from Fourwaves and OpenSIPS
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 3d agoFourwavesOne-click copy for custom-domain DNS records
- 4d agoFourwavesParticipants get a communication Preferences page
- 6d agoFourwavesEmail alerts for unread direct messages
- 9d agoFourwavesExports now match dashboard timezone
- 11d agoFourwavesDiscussion emails show author and message preview
- 13d agoFourwavesProfile Contact button removed in favor of DMs
- 3mo agoOpenSIPSOpenSIPS 4.0 release candidate 2
- 4mo agoOpenSIPSOpenSIPS 4.0 enters release-candidate testing
Frequently asked questions
What is the difference between Fourwaves and OpenSIPS?
They serve adjacent needs but don't currently overlap on shipped themes. Fourwaves is currently shipping more aggressively (velocity 6.3 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 Fourwaves better than OpenSIPS?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Fourwaves is currently shipping more aggressively (velocity 6.3 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 Fourwaves?
Top Fourwaves alternatives in Meetings are ranked by recent ship velocity. Browse the "Fourwaves alternatives" section above for the current picks, or visit /alternatives/fourwaves 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.