Maddy
A one-binary mail server learning to behave like production infrastructure.
A side-by-side editorial comparison of Stalwart and Friendica — release velocity, themes, recent moves, and the top alternatives to consider.
Stalwart keeps chasing standards nobody has implemented yet — DKIM2, DMARCbis, now JMAP email push.
Stalwart is a single-binary mail and collaboration server covering JMAP, IMAP, SMTP, CalDAV and CardDAV. The 0.16.x line ships roughly weekly and its additions cluster in one place: implementing IETF drafts and fresh RFCs ahead of the field, while a long tail of JMAP conformance and MTA edge-case fixes runs underneath. The latest release adds JMAP email delivery push notifications, completing a push stack built across the last three releases.
Friendica keeps betting on being the fediverse node that speaks everyone else's protocols.
Friendica is a self-hosted decentralised social platform, released on calendar versions two or three times a year with codenames and a consistent structure: a handful of highlights, a security-fix credit, and a pointer to the changelog. The recent run — 2023.12, 2024.03, 2024.08, 2024.12, 2026.01, 2026.05 — shows the cadence thinning, with a full year between 2024.12 and 2026.01. Nearly every release credits externally reported security issues, most recently from Doyensec working with Mastodon.
Stalwart is a single-binary mail and collaboration server covering JMAP, IMAP, SMTP, CalDAV and CardDAV. The 0.16.x line ships roughly weekly and its additions cluster in one place: implementing IETF drafts and fresh RFCs ahead of the field, while a long tail of JMAP conformance and MTA edge-case fixes runs underneath. The latest release adds JMAP email delivery push notifications, completing a push stack built across the last three releases.
The push story is the clearest arc: Web Push payload and subscription fixes in 0.16.10, VAPID per RFC 9749 in 0.16.14, and the emailpush draft in 0.16.16. Parallel to it, 0.16.12 landed DKIM2 and the DMARCbis trio, and the fix lists keep narrowing toward strict-spec behaviour — DMARC alignment reporting, SMTP line-length limits, BDAT error codes. Stalwart is positioning as the reference implementation of modern mail standards rather than competing on features.
Expect the JMAP push work to keep filling in — subscription lifecycle, delivery semantics — alongside continued DKIM2 and DMARCbis refinement as those drafts move. The fix cadence suggests operational hardening around clustering and Redis locking is the other near-term thread.
Friendica is a self-hosted decentralised social platform, released on calendar versions two or three times a year with codenames and a consistent structure: a handful of highlights, a security-fix credit, and a pointer to the changelog. The recent run — 2023.12, 2024.03, 2024.08, 2024.12, 2026.01, 2026.05 — shows the cadence thinning, with a full year between 2024.12 and 2026.01. Nearly every release credits externally reported security issues, most recently from Doyensec working with Mastodon.
Two lines of work dominate. The first is connectors: an initial Bluesky bridge in 2023.05 made bi-directional by 2023.12, Tumblr support maintained throughout, and ATproto account integration plus Bridgy Fed support improved in 2026.05. The second is Channels — the user-defined algorithm for sorting the network stream — introduced in 2023.12 and given performance and sorting work in every release since. Running against both is a deliberate pruning of legacy: OStatus dropped in 2024.12 after the project measured how few servers still needed it, and the fancybox addon deprecated alongside it.
Expect the next release to continue the ATproto and Bridgy Fed integration work and further Channels performance tuning, with the accessibility review started in 2026.01 producing more fixes. Given the year-long gap before 2026.01, the cadence itself is the uncertain part.
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 Friendica.
A one-binary mail server learning to behave like production infrastructure.
The original federated social network now ships roughly once every two years.
Six releases, and every one of them is a security update in some form.
Renamed Element Classic, this client now ships one small fix every few months
Twilio is selling trust: branded calls, scoped keys, and stricter sender vetting.
Notion is turning Custom Agents into event-driven workers with their own runtime and billing.
See all Stalwart alternatives → · See all Friendica alternatives →
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
Both compete on the same themes — self-hosted — within Comms. Stalwart is currently shipping more aggressively (velocity 5.0 vs 0.0), 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.
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Stalwart is currently shipping more aggressively (velocity 5.0 vs 0.0), 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.
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.
Top Friendica alternatives in Comms are ranked by recent ship velocity. Browse the "Friendica alternatives" section above for the current picks, or visit /alternatives/friendica for the full list with editorial commentary on each.