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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 doubles Free plan submissions to 50 and reworks reviewer assignment.
Fourwaves ships small dated updates most days. November 11 raised the Free plan from 25 to 50 submissions, and November 12 added a four-step Assign reviewers window. Earlier in November it brought offline mobile check-in for Pro organizers and saved email templates for Advanced and Pro.
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
5.0MEETINGS
Fourwaves doubles Free plan submissions to 50 and reworks reviewer assignment.
◆ Current state
Fourwaves ships small dated updates most days. November 11 raised the Free plan from 25 to 50 submissions, and November 12 added a four-step Assign reviewers window. Earlier in November it brought offline mobile check-in for Pro organizers and saved email templates for Advanced and Pro.
◆ Where it's heading
Most releases go to organizer tools for running the event and the review process, with features gated to paid plans. The Free plan increase is the first move in this run that widens the entry tier rather than adding to paid ones.
◆ Prediction
Expect more steps in the submission and review workflow to follow the new reviewer window; whether the Free plan change is part of a wider pricing revision is unclear from the entries.
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.
3CX
3CX sets the end of 2026 to switch off its own transcription service.
Eventcombo
Eventcombo adds webinar demo checklists to its 2027 buyer guides.
JW Player
JW Player's Android SDK 4.28 adds live Chromecast and new background audio controls.
Nextcloud Talk
Nextcloud Talk v23.0.14 fixes Firefox video and keeps v25 waiting at RC3.
Kurento
Kurento's JavaScript client gets a 7.3.1 point release with no notes.
See all Fourwaves alternatives → · See all OpenSIPS alternatives →
Recent activity from Fourwaves and OpenSIPS
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoFourwavesNew four-step window for assigning reviewers
- 3d agoFourwavesFree plan now includes 50 submissions, up from 25
- 4d agoFourwavesOffline mobile check-in for Pro organizers
- 5d agoFourwavesParticipant pages show the same data to organizers
- 9d agoFourwavesSaved email templates for Advanced and Pro organizers
- 10d agoFourwavesAustralia/Sydney added as a reference timezone
- 4mo agoOpenSIPSOpenSIPS 4.0 release candidate 2
- 5mo 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 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 Fourwaves better than OpenSIPS?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Fourwaves 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 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.