Chatwoot
Chatwoot is building an AI-first support platform, with Captain gaining audience targeting and macro automation reaching the keyboard-native workflow.
Comparison · Comms
grommunio vs Stalwart
A side-by-side editorial comparison of grommunio and Stalwart — release velocity, themes, recent moves, and the top alternatives to consider.
grommunio vs Stalwart: at a glance
What is grommunio?
grommunio's feed publishes release pointers only; the changes themselves live on GitHub.
The crawled feed carries twelve release-note stubs spanning August 2021 to June 2026, each the same 134-character sentence directing readers to GitHub for the detailed logs. Version 2026.06.1 is the most recent. Nothing in the feed states what changed in any release, so the platform's current capability surface cannot be read from this source.
What is Stalwart?
Stalwart adds full SCIM v2 provisioning and 24-language calendar support as its standards coverage extends further than most commercial mail servers.
Stalwart is maintaining a weekly-or-faster release cadence, with alternating feature releases and dense bug-fix releases. The v0.16.20 release landed full SCIM v2 (Enterprise) including cursor-based pagination and the IPSIE lifecycle profile, conference links in calendar invites, and 24 new calendar interface translations. Below the feature line, the project is steadily closing correctness gaps across JMAP, CalDAV, IMAP, and MTA — many of them edge-case RFC compliance issues.
grommunio vs Stalwart: editorial side-by-side
grommunio
0.0COMMS
grommunio's feed publishes release pointers only; the changes themselves live on GitHub.
◆ Current state
The crawled feed carries twelve release-note stubs spanning August 2021 to June 2026, each the same 134-character sentence directing readers to GitHub for the detailed logs. Version 2026.06.1 is the most recent. Nothing in the feed states what changed in any release, so the platform's current capability surface cannot be read from this source.
◆ Where it's heading
The only signal available is cadence, and it is thin and irregular: twelve published notes across roughly five years, with 2023.11.x, 2025.01.x and 2026.06.1 as the visible markers. That is a release-notes page maintained as an index rather than a changelog. Reading direction from grommunio would require the GitHub logs these notes point at.
◆ Prediction
Expect the next entry to be another dated pointer of the same form. Whether grommunio's real release cadence matches this feed cannot be determined from what is published here.
Stalwart
6.3COMMS
Stalwart adds full SCIM v2 provisioning and 24-language calendar support as its standards coverage extends further than most commercial mail servers.
◆ Current state
Stalwart is maintaining a weekly-or-faster release cadence, with alternating feature releases and dense bug-fix releases. The v0.16.20 release landed full SCIM v2 (Enterprise) including cursor-based pagination and the IPSIE lifecycle profile, conference links in calendar invites, and 24 new calendar interface translations. Below the feature line, the project is steadily closing correctness gaps across JMAP, CalDAV, IMAP, and MTA — many of them edge-case RFC compliance issues.
◆ Where it's heading
Stalwart is building toward parity with commercial enterprise mail servers on identity federation and provisioning (SCIM v2, VAPID for web push, DMARCbis/DKIM2 already landed). The pace of RFC implementation is unusually aggressive for an open-source project; the combination of JMAP, CalDAV, IMAP UIDONLY/UIDBATCHES, and SCIM v2 positions it as a viable self-hosted alternative for organizations that need standards compliance without vendor lock-in.
◆ Prediction
WebAuthn/passkey-based authentication and improved multi-tenant administration tooling are the most likely next capability additions, given the current trajectory toward enterprise identity management.
Alternatives to grommunio 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 grommunio or Stalwart.
Signal Desktop
Signal adds granular notification controls: badge content, muted threads, restore defaults
Zoho Cliq
Zoho Cliq 7.0 bets on AI conversation summaries and Neat hardware to close the gap with enterprise messaging platforms
Krisp
Krisp adds deepfake detection and expands Voice Translation as its Call Center AI platform deepens enterprise compliance tools.
Netcore Cloud
Netcore's recent entries are blog content, not product releases — the signal is a BFSI and ecommerce vertical sales push.
Canary Mail
Canary Mail ships AI chat history while sustaining a cross-platform bug fix cadence.
See all grommunio alternatives → · See all Stalwart alternatives →
Recent activity from grommunio and Stalwart
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 9d agoStalwartv0.16.21
- 17d agoStalwartv0.16.20 ⚡
- 22d agoStalwartv0.16.19
- 29d agoStalwartv0.16.18
- 1mo agoStalwartv0.16.17
- 1mo agoStalwartv0.16.16
- 2mo agogrommunioRelease Notes 2026.06.1
- 1y agogrommunioRelease Notes 2025.01.2
- 1y agogrommunioRelease Notes 2025.01.1
- 2y agogrommunioRelease Notes 2023.11.3
- 2y agogrommunioRelease Notes 2023.11.2
- 2y agogrommunioRelease Notes 2023.11.1
Frequently asked questions
What is the difference between grommunio and Stalwart?
They serve adjacent needs but don't currently overlap on shipped themes. Stalwart is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 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 grommunio better than Stalwart?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Stalwart is currently shipping more aggressively (velocity 6.3 vs 0.0), with 1 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 grommunio?
Top grommunio alternatives in Comms are ranked by recent ship velocity. Browse the "grommunio alternatives" section above for the current picks, or visit /alternatives/grommunio 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.