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Comparison · Comms
Rocket.Chat vs Stalwart
A side-by-side editorial comparison of Rocket.Chat and Stalwart — release velocity, themes, recent moves, and the top alternatives to consider.
Rocket.Chat vs Stalwart: at a glance
What is Rocket.Chat?
Six release candidates into 8.7, and five of them are version bumps.
Rocket.Chat is six candidates deep into 8.7.0, and the visible content of that train is thin. Five of the six most recent entries carry an identical body: a Meteor package bump with internal typings following. The engine floor holds steady across the whole window at Node 22.22.3, Deno 2.3.1, MongoDB 8.0, and Apps-Engine 1.65.1-rc.0. The one substantive change in the cycle sits back in 8.7.0-rc.0, which added session identification to the device management API.
What is Stalwart?
Stalwart is chasing mail RFCs and its own storage layer at the same time
Stalwart ships roughly weekly, and the releases divide cleanly between standards implementation and correctness work. v0.16.18 turns toward resource control — bounds on decompressed inbound DMARC and TLS report size, a cap on RocksDB block-cache memory, column families tuned per access pattern, and a queue scheduler that stops rescanning from the earliest pending event. The preceding releases added IMAP UIDONLY, UIDBATCHES and MESSAGELIMIT, plus JMAP email push and VAPID.
Rocket.Chat vs Stalwart: editorial side-by-side
Rocket.Chat
6.3COMMS
Six release candidates into 8.7, and five of them are version bumps.
◆ Current state
Rocket.Chat is six candidates deep into 8.7.0, and the visible content of that train is thin. Five of the six most recent entries carry an identical body: a Meteor package bump with internal typings following. The engine floor holds steady across the whole window at Node 22.22.3, Deno 2.3.1, MongoDB 8.0, and Apps-Engine 1.65.1-rc.0. The one substantive change in the cycle sits back in 8.7.0-rc.0, which added session identification to the device management API.
◆ Where it's heading
This is a stabilization run rather than a feature cycle, and the same shape repeated in 8.6.0, whose rc.1 through rc.3 read the same way. Each cycle front-loads its minor changes into rc.0, then spends weeks on version bumps with isolated fixes folded in. For anyone reading the changelog, that means almost nothing is learnable between an rc.0 and the eventual release.
◆ Prediction
Expect 8.7.0 to reach general availability with a note consolidating the rc.0 session-management change and the scattered candidate fixes; on this pattern the next real signal comes with 8.8.0-rc.0, not from the remaining 8.7 candidates.
Stalwart
5.0COMMS
Stalwart is chasing mail RFCs and its own storage layer at the same time
◆ Current state
Stalwart ships roughly weekly, and the releases divide cleanly between standards implementation and correctness work. v0.16.18 turns toward resource control — bounds on decompressed inbound DMARC and TLS report size, a cap on RocksDB block-cache memory, column families tuned per access pattern, and a queue scheduler that stops rescanning from the earliest pending event. The preceding releases added IMAP UIDONLY, UIDBATCHES and MESSAGELIMIT, plus JMAP email push and VAPID.
◆ Where it's heading
Two threads run through every release. One is RFC coverage across IMAP, JMAP, CalDAV and WebDAV, implemented close to the specification including drafts. The other is a long tail of protocol-conformance fixes, many of them cases where JMAP and IMAP disagreed about the same state. The newest release adds a third: memory and scheduling limits, which is what a server codebase starts doing when deployments get large enough for defaults to hurt.
◆ Prediction
Expect continued RFC additions across the JMAP and IMAP surfaces, with more of the storage-tuning work that v0.16.18 started as RocksDB deployments scale.
Alternatives to Rocket.Chat and Stalwart
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 Rocket.Chat or Stalwart.
Proton Bridge
Proton Bridge spends its first release in ten weeks on crashes, memory bounds and dead code
Mux
Every manual control Mux ships now arrives with a Robots workflow that does it for you
Netcore Cloud
Netcore's feed remains a demand-generation channel; ten entries, zero product releases.
mailcow
mailcow's release notes are almost entirely upstream security currency.
Openfire
Openfire keeps its XMPP server current without changing what it is.
See all Rocket.Chat alternatives → · See all Stalwart alternatives →
Recent activity from Rocket.Chat and Stalwart
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoStalwartResource limits arrive for inbound reports and RocksDB caches
- 8d agoStalwartIMAP gains UIDONLY, UIDBATCHES and message-limit extensions
- 12d agoRocket.Chat8.7.0-rc.6: Meteor version bump only
- 14d agoRocket.Chat8.7.0-rc.5: Meteor version bump only
- 16d agoRocket.Chat8.7.0-rc.4: audio attachments become seekable again
- 16d agoStalwartJMAP delivery push arrives; strict relays stop rejecting calendar mail
- 19d agoRocket.Chat8.7.0-rc.3: Meteor version bump only
- 23d agoStalwartFix-only release: JMAP semantics and a credential escalation
- 27d agoRocket.Chat8.7.0-rc.2: Meteor version bump only
- 27d agoRocket.Chat8.7.0-rc.1: Meteor version bump only
- 29d agoStalwartVAPID lands for JMAP Web Push
- 1mo agoStalwartFreeBSD support, plus OAuth scopes for IMAP, SMTP and Sieve
Frequently asked questions
What is the difference between Rocket.Chat and Stalwart?
They serve adjacent needs but don't currently overlap on shipped themes. Rocket.Chat is currently shipping more aggressively (velocity 6.3 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 Rocket.Chat better than Stalwart?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Rocket.Chat is currently shipping more aggressively (velocity 6.3 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 Comms products to evaluate alongside.
What are the best alternatives to Rocket.Chat?
Top Rocket.Chat alternatives in Comms are ranked by recent ship velocity. Browse the "Rocket.Chat alternatives" section above for the current picks, or visit /alternatives/rocketchat for the full list with editorial commentary on each.
What are the best alternatives to Stalwart?
Top Stalwart alternatives in Comms are ranked by recent ship velocity. Browse the "Stalwart alternatives" section above for the current picks, or visit /alternatives/stalwart for the full list with editorial commentary on each.