Fonoster
Fonoster ships four releases in a day to make linking a Twilio number a single step.
Comparison · Comms
Stalwart vs Superhuman
A side-by-side editorial comparison of Stalwart and Superhuman — release velocity, themes, recent moves, and the top alternatives to consider.
Stalwart vs Superhuman: at a glance
| Feature | Stalwart | Superhuman |
|---|---|---|
| Sector | Comms | Comms |
| Velocity score | 6.3 | 5.0 |
| Sparks · 30d | 0 | 0 |
| Top themes | email-server, scim, jmap, enterprise-provisioning | email, mobile, calendar, ai assistant |
| Last editorial update | 1mo ago | 3d ago |
| Website | Visit → | — |
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.
What is Superhuman?
Superhuman adapts to iPhone Duo and iOS 27 as its mobile app catches up.
Superhuman is a premium email client that is building out a calendar and team features around its mail core. Its October mobile batch added Compact Mode, swipe actions and attachment-aware AI. The newest release optimizes the iOS app for the dual-screen iPhone Duo and for iOS 27 screen sizes.
Stalwart vs Superhuman: editorial side-by-side
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.
Superhuman
5.0COMMS
Superhuman adapts to iPhone Duo and iOS 27 as its mobile app catches up.
◆ Current state
Superhuman is a premium email client that is building out a calendar and team features around its mail core. Its October mobile batch added Compact Mode, swipe actions and attachment-aware AI. The newest release optimizes the iOS app for the dual-screen iPhone Duo and for iOS 27 screen sizes.
◆ Where it's heading
Superhuman is closing gaps on mobile and in the calendar: density, gestures, recurring meetings, week settings and room booking. The Duo note points to multi-pane mobile layouts next, with mail and calendar side by side, which would tie the two halves of the product together on the phone.
◆ Prediction
Expect a dual-pane Duo layout that shows an email next to the calendar, as the release itself promises, plus more calendar basics.
Alternatives to Stalwart and Superhuman
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 Stalwart or Superhuman.
Element
Element 1.12.33 ships: simpler recovery keys, mandatory verification, no libolm migration.
Tawk.to
tawk.to's widget 4.4.0 turns to keyboard and screen-reader fixes after a run of form work.
Krisp
Krisp 2.83.4 brings Voice Translation into conference calls and lightens Accent Conversion.
Pixelfed
Pixelfed 0.15.2 ships the PHP RCE patches and turns cached timelines on for everyone.
Salesmsg
Salesmsg Reviews can now trigger follow-ups automatically based on a customer's latest rating.
See all Stalwart alternatives → · See all Superhuman alternatives →
Recent activity from Stalwart and Superhuman
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 6d agoSuperhumanSuperhuman Mail for iPhone Duo
- 15d agoSuperhumanSwipe to reply or forward ↩
- 15d agoSuperhumanCustomize your week 📆
- 15d agoSuperhumanEmoji reactions on comments 🙌
- 15d agoSuperhumanCompact Mode 🔍
- 15d agoSuperhumanSee more as you scroll 👀
- 1mo agoStalwartv0.16.21
- 2mo agoStalwartv0.16.20 ⚡
- 2mo agoStalwartv0.16.19
- 2mo agoStalwartv0.16.18
- 2mo agoStalwartv0.16.17
- 2mo agoStalwartv0.16.16
Frequently asked questions
What is the difference between Stalwart and Superhuman?
They serve adjacent needs but don't currently overlap on shipped themes. Stalwart 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 Stalwart better than Superhuman?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Stalwart 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 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.
What are the best alternatives to Superhuman?
Top Superhuman alternatives in Comms are ranked by recent ship velocity. Browse the "Superhuman alternatives" section above for the current picks, or visit /alternatives/superhuman for the full list with editorial commentary on each.