Fourwaves
Fourwaves follows its participant inbox with a week of admin fixes and security hardening.
Comparison · Meetings
BigBlueButton vs Kaltura
A side-by-side editorial comparison of BigBlueButton and Kaltura — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:open-source
BigBlueButton vs Kaltura: at a glance
What is BigBlueButton?
BigBlueButton 4.0 rc.5 drops Etherpad and makes BlockNote the only notes editor.
BigBlueButton 4.0.0-rc.5 removes Etherpad, so upgrading uninstalls bbb-etherpad and bbb-pads and leaves BlockNote as the only shared-notes editor. It also moves Node components to Node.js 24, switches the client to the 1.0 pre-release plugin SDK, and redesigns the poll and quiz panels. It follows two security-only candidates, and the project still recommends 3.0.x for production.
What is Kaltura?
Kaltura goes all-in on agentic AI video — Event OS, avatar roleplay, and an open-sourced AI Agent Skills suite.
Kaltura is in the middle of a sharp pivot toward agentic AI for rich-media platforms. In a single month it has open-sourced an AI Agent Skills suite (so any third-party AI agent can build rich-media experiences), introduced Event OS for AI Agents (natural-language event creation and orchestration), unveiled an avatar-powered roleplay solution for enterprise training, and is presenting an Agentic Revenue Engagement Platform at Forrester. The releases are tightly aligned around one thesis.
BigBlueButton vs Kaltura: editorial side-by-side
BigBlueButton
5.0MEETINGS
BigBlueButton 4.0 rc.5 drops Etherpad and makes BlockNote the only notes editor.
◆ Current state
BigBlueButton 4.0.0-rc.5 removes Etherpad, so upgrading uninstalls bbb-etherpad and bbb-pads and leaves BlockNote as the only shared-notes editor. It also moves Node components to Node.js 24, switches the client to the 1.0 pre-release plugin SDK, and redesigns the poll and quiz panels. It follows two security-only candidates, and the project still recommends 3.0.x for production.
◆ Where it's heading
The 4.0 cycle is removing legacy components one by one: SIP.js audio went in beta.4, and Etherpad goes now. Between the removals, security-only candidates harden the new LiveKit audio and BlockNote notes surfaces. The plugin SDK reaching a 1.0 pre-release suggests the extension API is being frozen for GA.
◆ Prediction
Expect at least one more candidate to settle the plugin SDK 1.0 change and Etherpad removal before 4.0.0 GA. The pace of security advisories makes the exact timing unclear.
Kaltura
8.8MEETINGS
Kaltura goes all-in on agentic AI video — Event OS, avatar roleplay, and an open-sourced AI Agent Skills suite.
◆ Current state
Kaltura is in the middle of a sharp pivot toward agentic AI for rich-media platforms. In a single month it has open-sourced an AI Agent Skills suite (so any third-party AI agent can build rich-media experiences), introduced Event OS for AI Agents (natural-language event creation and orchestration), unveiled an avatar-powered roleplay solution for enterprise training, and is presenting an Agentic Revenue Engagement Platform at Forrester. The releases are tightly aligned around one thesis.
◆ Where it's heading
The arc is clearly from a video platform into an agentic-AI orchestration layer that happens to specialize in video. Kaltura is staking out the position that video, events, training, and revenue engagement should all be run through AI agents talking to its platform — and is willing to open-source the agent-skills layer to make Kaltura the default endpoint for rich-media agents.
◆ Prediction
Expect a paid agent runtime or pricing model on top of the open-sourced skills, deeper avatar/roleplay options for enterprise L&D, and Event OS plug-ins for major collaboration platforms (Teams, Slack, Google Workspace). The next big tell will be how serious enterprise adoption of Event OS becomes versus staying a demo-stage capability.
Alternatives to BigBlueButton and Kaltura
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 Kaltura.
HOMER
HOMER 11.0.369 fixes S3 auth on Ceph-based storage and stops compaction memory growth.
Element Call
Element Call starts moving to new LiveKit transports and falls back to remote SFUs when needed.
JW Player
JW Player moves CMAF VOD into the dashboard, adds AV1, and opens Broadcast Live to audio-only feeds.
rtpengine
rtpengine opens the mr26.3 branch with a rollback message and leaner call state.
Nextcloud Talk Desktop
Nextcloud Talk Desktop 2.3.3 adds accessibility options and bundles Talk v25.0.6.
See all BigBlueButton alternatives → · See all Kaltura alternatives →
Recent activity from BigBlueButton and Kaltura
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 21d agoBigBlueButtonBigBlueButton 4.0 rc.5 removes Etherpad and moves to Node.js 24
- 28d agoBigBlueButtonBigBlueButton 4.0 rc.4 patches audio and notes security flaws
- 1mo agoBigBlueButtonBigBlueButton 4.0 rc.3 hardens LiveKit reconnection
- 1mo agoBigBlueButtonBigBlueButton 4.0 rc.2 fixes cross-meeting security flaws
- 1mo agoBigBlueButtonBigBlueButton 4.0 rc.1 completes the LiveKit audio migration ⚡
- 2mo agoBigBlueButtonBigBlueButton 4.0 beta.5 overhauls mobile layout
- 5mo agoKalturaKaltura Open-Sources Suite of AI Agent Skills, Enabling Any AI Agent to Build Intelligent Rich-Media Digital Experiences ⚡
- 6mo agoKalturaKaltura Introduces Event OS for AI Agents, Enabling Organizations to Create and Orchestrate Events Through Natural-Language Conversation ⚡
- 6mo agoKalturaKaltura Introduces Event OS for AI Agents, Enabling Organizations to Create and Orchestrate Events Through Natural-Language Conversation
- 6mo agoKalturaKaltura Unveils Avatar-Powered Roleplay Solution for Enterprise Training and Simulations ⚡
- 6mo agoKalturaKaltura Unveils Avatar-Powered Roleplay Solution for Enterprise Training and Simulations
- 6mo agoKalturaKaltura to Present Agentic Revenue Engagement Platform at Forrester B2B Summit 2026, Showcasing the Shift From Static Content Publishing to Intent-Aware, AI-Powered Buyer Journeys
Frequently asked questions
What is the difference between BigBlueButton and Kaltura?
Both compete on the same themes — open-source — within Meetings. Kaltura is currently shipping more aggressively (velocity 8.8 vs 5.0), 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 Kaltura?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Kaltura is currently shipping more aggressively (velocity 8.8 vs 5.0), 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 Kaltura?
Top Kaltura alternatives in Meetings are ranked by recent ship velocity. Browse the "Kaltura alternatives" section above for the current picks, or visit /alternatives/kaltura for the full list with editorial commentary on each.