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Comparison · Comms
Mailu vs Whereby
A side-by-side editorial comparison of Mailu and Whereby — release velocity, themes, recent moves, and the top alternatives to consider.
Mailu vs Whereby: at a glance
What is Mailu?
Mailu's October: patched PHP for webmail, and a resolver that reports DNS failures
Mailu's 2024.06 branch shipped six pinned releases in October, each tied to a single issue. Three dealt with the resolver: handling the DNSSEC KSK rollover, then making the healthcheck fail on SERVFAIL, re-shipped once. Three were webmail: Roundcube 1.6.20, mitigations for the PHP2Shell CVEs, and then the patched PHP runtime. Late September releases fixed boolean settings that could not be turned off and stale webmail sessions after switching accounts via SSO.
What is Whereby?
Whereby folds three months into one digest and still lists nothing specific
Whereby's latest entry covers August through October in a single round-up, again framed around developer experience and SDKs, with no concrete features in the feed text. The last specific capabilities visible are session ratings for Embedded customers in April and the native iOS SDK leaving beta in February.
Mailu vs Whereby: editorial side-by-side
Mailu
5.0COMMS
Mailu's October: patched PHP for webmail, and a resolver that reports DNS failures
◆ Current state
Mailu's 2024.06 branch shipped six pinned releases in October, each tied to a single issue. Three dealt with the resolver: handling the DNSSEC KSK rollover, then making the healthcheck fail on SERVFAIL, re-shipped once. Three were webmail: Roundcube 1.6.20, mitigations for the PHP2Shell CVEs, and then the patched PHP runtime. Late September releases fixed boolean settings that could not be turned off and stale webmail sessions after switching accounts via SSO.
◆ Where it's heading
The project remains in one-fix-per-release maintenance on the 2024.06 line, with upstream webmail and PHP security driving much of the cadence. Nothing in the entries points to a new main release.
◆ Prediction
The next releases will most likely follow upstream Roundcube or PHP security fixes, as three of the last six did.
Whereby
2.5MEETINGSCOLLAB
Whereby folds three months into one digest and still lists nothing specific
◆ Current state
Whereby's latest entry covers August through October in a single round-up, again framed around developer experience and SDKs, with no concrete features in the feed text. The last specific capabilities visible are session ratings for Embedded customers in April and the native iOS SDK leaving beta in February.
◆ Where it's heading
The cadence is slowing: monthly digests have become a quarterly one, and the framing remains aimed at developers embedding video rather than meeting hosts. Without specifics in the notes, the direction can only be read from the framing, which points at SDK and embedding work.
◆ Prediction
The next entry is most likely another multi-month SDK round-up; the feed gives no signal of a larger launch.
Mailu alternatives
Other Comms products tracked by Sparkpulse, ranked by recent ship velocity. Tap any card for the full editorial trajectory or compare directly with Mailu.
Stoat
Stoat moves to release candidates and Gerrit, and gives server admins more control.
Element
Element 1.12.34 RC pops calls into picture-in-picture and lets modules shut off public rooms.
Synapse
Synapse 1.164 advertises Matrix v1.16 and v1.17 amid a run of dependency security patches
Subsplash
Subsplash gives church staff notes on every person and every Workflow card.
Maddy
maddy's latest release is a security fix, five months after its last feature work.
Whereby alternatives
Other Comms products tracked by Sparkpulse, ranked by recent ship velocity. Tap any card for the full editorial trajectory or compare directly with Whereby.
Switcher Studio
Switcher Studio's feed stays on streaming guides since Instant Replay shipped in August.
Red5
Red5 2.2.0 makes JDK 25 the minimum after a run of thinly documented patches.
3CX
3CX is retiring its own cloud transcription and pushing customers to bring their own AI.
HOMER
HOMER 11.0.375 lets PostgreSQL hold its settings and DuckLake catalog.
rtpengine
rtpengine pushes one batch of SRTP, ICE and Redis fixes to four branches at once.
Bizzabo
Bizzabo ships Sponsor ROI, a product aimed at the sponsorship revenue line.
Recent activity from Mailu and Whereby
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoWherebyWhereby SDK & Product Updates August–October 2026
- 12d agoMailuMailu ships patched PHP for PHP2Shell CVEs
- 13d agoMailuMailu mitigates PHP2Shell webmail CVEs
- 15d agoMailuMailu 2024.06.65: Roundcube 1.6.20 update
- 20d agoMailu2024.06.64 re-ships the resolver healthcheck fix
- 22d agoMailu2024.06.63 makes the resolver healthcheck catch SERVFAIL
- 23d agoMailu2024.06.62 handles the DNSSEC KSK rollover
- 3mo agoWherebyWhereby SDK & Product Updates July 2026
- 4mo agoWherebyWhereby SDK & Product Updates June 2026
- 6mo agoWherebyNew: Get Feedback on Your Call Quality with Session Ratings⭐️
- 7mo agoWherebyWe’ve been making incremental improvements across Whereby, with a focus on both the in-session experience and our developer tools.
- 7mo agoWherebyWhereby SDK & Product Updates March 2026
Frequently asked questions
What is the difference between Mailu and Whereby?
They serve adjacent needs but don't currently overlap on shipped themes. Mailu is currently shipping more aggressively (velocity 5.0 vs 2.5), 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 Mailu better than Whereby?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Mailu is currently shipping more aggressively (velocity 5.0 vs 2.5), with 0 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Comms products to evaluate alongside.
What are the best alternatives to Mailu?
Top Mailu alternatives in Comms are ranked by recent ship velocity. Browse the "Mailu alternatives" section above for the current picks, or visit /alternatives/mailu for the full list with editorial commentary on each.
What are the best alternatives to Whereby?
Top Whereby alternatives in Comms are ranked by recent ship velocity. Browse the "Whereby alternatives" section above for the current picks, or visit /alternatives/whereby for the full list with editorial commentary on each.