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Comparison · Comms
Mailu vs Apache RocketMQ
A side-by-side editorial comparison of Mailu and Apache RocketMQ — release velocity, themes, recent moves, and the top alternatives to consider.
Mailu vs Apache RocketMQ: 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 Apache RocketMQ?
The RocksDB migration reaches native code as the legacy DLedger broker mode is marked for removal
The 5.x line continues to replace storage internals with RocksDB and to retire the mechanisms it supersedes. 5.5.1, the first release since April, swaps the pure-Java ConsumeQueue compaction filter for a native RocksDB CqCompactionFilter behind a cross-platform JNI shim, drops the shaded rocketmq-rocksdb dependency, and deprecates the legacy Broker DLedger mode. Lite Mode, introduced in 5.5.0, received stability work rather than the client-side adoption path it still needs. Alongside this sit fastjson 1.x removal and a long list of Proxy, Pop and Remoting fixes.
Mailu vs Apache RocketMQ: 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.
Apache RocketMQ
2.5COMMS
The RocksDB migration reaches native code as the legacy DLedger broker mode is marked for removal
◆ Current state
The 5.x line continues to replace storage internals with RocksDB and to retire the mechanisms it supersedes. 5.5.1, the first release since April, swaps the pure-Java ConsumeQueue compaction filter for a native RocksDB CqCompactionFilter behind a cross-platform JNI shim, drops the shaded rocketmq-rocksdb dependency, and deprecates the legacy Broker DLedger mode. Lite Mode, introduced in 5.5.0, received stability work rather than the client-side adoption path it still needs. Alongside this sit fastjson 1.x removal and a long list of Proxy, Pop and Remoting fixes.
◆ Where it's heading
The storage convergence is now deep enough to cross the JNI boundary — RocksDB is no longer an alternate index but the substrate, and the project is willing to take on native build complexity across platforms to get its performance. In parallel, deprecating legacy Broker DLedger narrows the replication story toward the jRaft controller, cutting a maintenance branch rather than carrying both. Lite Mode remains the open bet: it is being maintained but not yet extended outward to clients.
◆ Prediction
With legacy DLedger deprecated rather than removed, a following release that deletes it outright is the natural next step. Whether Lite Mode gains the client and proxy support it needs is still unresolved — 5.5.1 fixed it without broadening it.
Alternatives to Mailu and Apache RocketMQ
Other Comms 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 Mailu or Apache RocketMQ.
VerneMQ
VerneMQ follows its year-in-the-making 2.2.0 with a quick round of subscription fixes.
Session
Session survived its funding scare; now Pro is on hold and Protocol v2 is the bet.
Misskey
Misskey moves to Sentry v11 and keeps shipping security fixes in its monthly releases.
Apprise
Apprise 2 is out: notify() returns a result object, and 2.1 takes the catalog to 170 services.
RSS.com
RSS.com's changelog is back after ten months, with listener voicemail for podcasts.
See all Mailu alternatives → · See all Apache RocketMQ alternatives →
Recent activity from Mailu and Apache RocketMQ
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 10d agoMailuMailu ships patched PHP for PHP2Shell CVEs
- 11d agoMailuMailu mitigates PHP2Shell webmail CVEs
- 13d agoMailuMailu 2024.06.65: Roundcube 1.6.20 update
- 18d agoMailu2024.06.64 re-ships the resolver healthcheck fix
- 20d agoMailu2024.06.63 makes the resolver healthcheck catch SERVFAIL
- 21d agoMailu2024.06.62 handles the DNSSEC KSK rollover
- 2mo agoApache RocketMQ5.5.1: native RocksDB compaction filter, legacy DLedger mode deprecated
- 6mo agoApache RocketMQ5.5.0 adds Lite Mode, a lightweight subscription path for AI workloads ⚡
- 10mo agoApache RocketMQ5.4.0: priority messages and RocksDB-backed timer, transaction and index
- 10mo agoApache RocketMQ5.3.4: TimerWheel snapshots and Netty, OpenTelemetry upgrades
- 1y agoApache RocketMQ5.3.3 drops ACL 1.0 in favour of ACL 2.0
- 1y agoApache RocketMQ5.3.2: RocksDB-based Pop consumption enters alpha
Frequently asked questions
What is the difference between Mailu and Apache RocketMQ?
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 Apache RocketMQ?
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 Apache RocketMQ?
Top Apache RocketMQ alternatives in Comms are ranked by recent ship velocity. Browse the "Apache RocketMQ alternatives" section above for the current picks, or visit /alternatives/rocketmq for the full list with editorial commentary on each.