Chanty
Chanty's radar signal is SEO listicles, not shipped product — velocity here is content, not change
Comparison · Comms
Stalwart vs Subsplash
A side-by-side editorial comparison of Stalwart and Subsplash — release velocity, themes, recent moves, and the top alternatives to consider.
Stalwart vs Subsplash: at a glance
| Feature | Stalwart | Subsplash |
|---|---|---|
| Sector | Comms | Comms |
| Velocity score | 5.0 | 5.0 |
| Sparks · 30d | 0 | 0 |
| Top themes | email-server, standards-compliance, email-authentication, jmap | church-tech, ai-assistant, natural-language, analytics |
| Last editorial update | 3d ago | 20h ago |
| Website | Visit → | — |
What is Stalwart?
Stalwart races to implement the newest email standards across its all-in-one server
Stalwart is an open-source, all-in-one mail and collaboration server (SMTP/IMAP/JMAP/CalDAV) shipping a fast 0.16.x point-release train. Recent releases are dominated by standards implementation and protocol-conformance work, layered over steady security hardening and a long tail of targeted bug fixes.
What is Subsplash?
Subsplash bets on plain-language AI over its ministry data while steadily building out Events
Subsplash is developing two arcs in parallel. The AI layer — Trends AI — is maturing fast: it now ingests media and campaign data alongside giving, people, and attendance, and the People Assistant lets staff query the congregation in plain language instead of building filters by hand. The second arc is Events and registration tooling: dashboard-based guest registration, a dedicated Events Manager role, and payment-waiver handling.
Stalwart vs Subsplash: editorial side-by-side
Stalwart
5.0COMMS
Stalwart races to implement the newest email standards across its all-in-one server
◆ Current state
Stalwart is an open-source, all-in-one mail and collaboration server (SMTP/IMAP/JMAP/CalDAV) shipping a fast 0.16.x point-release train. Recent releases are dominated by standards implementation and protocol-conformance work, layered over steady security hardening and a long tail of targeted bug fixes.
◆ Where it's heading
The product is doubling down on being the most standards-complete self-hosted mail server: early DKIM2 and DMARCbis authentication, IDN support, encryption-at-rest for S/MIME, and a sustained push to pass the JMAP test suite. Security hardening runs alongside — DANE downgrade-attack defenses, auto-ban fixes, binary attestation on every build.
◆ Prediction
Expect continued rapid 0.16.x releases advancing draft email-authentication standards and JMAP conformance; a larger 0.17 or 1.0 milestone becomes likely once the JMAP suite fully passes and the DKIM2/DMARCbis drafts stabilize.
Subsplash
5.0COMMS
Subsplash bets on plain-language AI over its ministry data while steadily building out Events
◆ Current state
Subsplash is developing two arcs in parallel. The AI layer — Trends AI — is maturing fast: it now ingests media and campaign data alongside giving, people, and attendance, and the People Assistant lets staff query the congregation in plain language instead of building filters by hand. The second arc is Events and registration tooling: dashboard-based guest registration, a dedicated Events Manager role, and payment-waiver handling.
◆ Where it's heading
The directional bet is natural-language access to ministry data. Trends AI started as a chart-and-dashboard product; the People Assistant moves it toward 'describe what you want' querying, and expanding its data sources makes that assistant progressively more useful. The Events work is solid but conventional — closing workflow gaps for church admins. The AI investment is what a competitor would react to.
◆ Prediction
Expect natural-language and AI-assist surfaces to spread from People and Trends into giving and workflows, and Trends AI to keep absorbing data sources so a single assistant can answer across the whole platform.
Alternatives to Stalwart and Subsplash
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 Subsplash.
Respond.io
Respond.io absorbs WhatsApp's phone-free identity shift while thickening its AI agent.
Telnyx
Telnyx is turning its carrier network into an agent-native voice AI platform.
Threema
Threema's feed is a privacy-advocacy blog first, product changelog second
Matrix
Matrix 1.19 lands encrypted room history sharing and custom emoji, clearing a multi-year MSC backlog
Notion
Notion is turning itself into the place teams and their AI agents share one board.
See all Stalwart alternatives → · See all Subsplash alternatives →
Recent activity from Stalwart and Subsplash
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoSubsplashRegister Guests & Waive Payments from Dashboard
- 3d agoStalwartDKIM2 and DMARCbis email-authentication support
- 9d agoSubsplashMedia and Campaign Data in Trends AI
- 14d agoStalwartEncryption-at-rest for S/MIME, Redis Sentinel backend
- 18d agoStalwartIDN support and JMAP test-suite conformance
- 1mo agoSubsplashPeople Assistant: AI-Powered Filtering ⚡
- 2mo agoSubsplashGroup Event Attendance Analytics
- 2mo agoSubsplashEvents Manager Role
- 3mo agoSubsplashFaster Workflow Board Navigation
Frequently asked questions
What is the difference between Stalwart and Subsplash?
They serve adjacent needs but don't currently overlap on shipped themes. Stalwart and Subsplash are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is Stalwart better than Subsplash?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Stalwart and Subsplash are shipping at a similar cadence (velocity 5.0 vs 5.0, both within Sparkpulse's "active" band). 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 Subsplash?
Top Subsplash alternatives in Comms are ranked by recent ship velocity. Browse the "Subsplash alternatives" section above for the current picks, or visit /alternatives/subsplash for the full list with editorial commentary on each.