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Comparison · Comms
diaspora vs mailcow
A side-by-side editorial comparison of diaspora and mailcow — release velocity, themes, recent moves, and the top alternatives to consider.
Shared themes:self-hosted
diaspora vs mailcow: at a glance
What is diaspora?
The original federated social network now ships roughly once every two years.
diaspora* is a decentralised social network run as independent pods by volunteer administrators. Release cadence has collapsed to near-dormancy: 0.9.0.0 arrived in June 2024 after a two-year gap, and 0.9.1.0 followed in April 2026 — the release notes open with "it's been a while." What still ships reliably is security work, including a fixed SSRF vulnerability in the OpenID Connect implementation and, earlier, image-processing hardening adapted from Mastodon's fix.
What is mailcow?
mailcow's release notes are almost entirely upstream security currency.
mailcow ships named seasonal releases with lettered revisions, and nearly every revision exists to pull in an upstream security fix - Redis, ClamAV, SOGo, Rspamd, nginx, unbound, Postfix. Revision B of the Mooly 2026 release updates Redis 7.4.10, ClamAV 1.4.6, and SOGo 5.12.10, adds minor web UI and nginx hardening, and removes a legacy DeltaChat sieve rule. The last release with genuinely new features was the March cut, which added forced 2FA, ACME DNS-01 challenges, and a passwordless autodiscover endpoint.
diaspora vs mailcow: editorial side-by-side
diaspora
0.0COMMS
The original federated social network now ships roughly once every two years.
◆ Current state
diaspora* is a decentralised social network run as independent pods by volunteer administrators. Release cadence has collapsed to near-dormancy: 0.9.0.0 arrived in June 2024 after a two-year gap, and 0.9.1.0 followed in April 2026 — the release notes open with "it's been a while." What still ships reliably is security work, including a fixed SSRF vulnerability in the OpenID Connect implementation and, earlier, image-processing hardening adapted from Mastodon's fix.
◆ Where it's heading
The one real forward move in this window was 0.9.0.0, which opened a supported public API and switched configuration to TOML with notice that YAML support ends at 1.0. Everything since has been maintenance. The project's own framing — a minor version described as not too exciting, urging podmins to update because it is a security release — sets the expectation plainly: diaspora* is being kept safe to run rather than developed toward anything new.
◆ Prediction
A 1.0 release removing YAML configuration support is the stated next milestone, but with two years between the last two releases the timing is unpredictable. The more likely near-term event is another security-driven patch.
mailcow
5.0COMMS
mailcow's release notes are almost entirely upstream security currency.
◆ Current state
mailcow ships named seasonal releases with lettered revisions, and nearly every revision exists to pull in an upstream security fix - Redis, ClamAV, SOGo, Rspamd, nginx, unbound, Postfix. Revision B of the Mooly 2026 release updates Redis 7.4.10, ClamAV 1.4.6, and SOGo 5.12.10, adds minor web UI and nginx hardening, and removes a legacy DeltaChat sieve rule. The last release with genuinely new features was the March cut, which added forced 2FA, ACME DNS-01 challenges, and a passwordless autodiscover endpoint.
◆ Where it's heading
For a self-hosted mail stack that bundles a dozen upstream components, keeping current with their CVEs is the product, and mailcow has organized its release cadence around exactly that. The pattern is consistent: a named release with some feature content every few months, then lettered revisions that are pure security currency plus small web UI escaping and validation fixes. The web interface is where mailcow's own code gets hardened - HTML escaping in quarantine views and sieve editors recurs across several revisions.
◆ Prediction
Expect the next entry to be another lettered revision carrying upstream updates, with the next named release likely bundling whatever feature work has accumulated since March.
Alternatives to diaspora and mailcow
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 diaspora or mailcow.
Proton Bridge
Proton Bridge spends its first release in ten weeks on crashes, memory bounds and dead code
Stalwart
Stalwart is chasing mail RFCs and its own storage layer at the same time
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.
Openfire
Openfire keeps its XMPP server current without changing what it is.
See all diaspora alternatives → · See all mailcow alternatives →
Recent activity from diaspora and mailcow
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3 - Revision B
- 20d agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3 - Revision A
- 1mo agomailcow🏖️🐮 Mooly 2026 | Postfix 3.10.12, Rspamd 4.1.0 & Nginx 1.30.3
- 2mo agomailcowThird May revision: unbound CVE and nginx 1.30.2
- 3mo agomailcowSecond May revision: quarantine table HTML escaping
- 3mo agomailcowSOGo 5.12.8 covering four upstream security issues
- 4mo agodiasporadiaspora* 0.9.1.0 patches an SSRF hole in its OIDC implementation
- 2y agodiasporadiaspora* 0.9.0.0 opens a supported API and moves config to TOML ⚡
- 3y agodiasporadiaspora* 0.7.18.2 hardens user image processing
- 3y agodiasporadiaspora* 0.7.18.1 fixes startup with multiple bundler versions
- 4y agodiasporadiaspora* 0.7.18.0 upgrades to Rails 6.1
- 4y agodiasporadiaspora* 0.7.17.0 blocks mass assignment of password and 2FA settings
Frequently asked questions
What is the difference between diaspora and mailcow?
Both compete on the same themes — self-hosted — within Comms. mailcow 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.
Is diaspora better than mailcow?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. mailcow 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.
What are the best alternatives to diaspora?
Top diaspora alternatives in Comms are ranked by recent ship velocity. Browse the "diaspora alternatives" section above for the current picks, or visit /alternatives/diaspora for the full list with editorial commentary on each.
What are the best alternatives to mailcow?
Top mailcow alternatives in Comms are ranked by recent ship velocity. Browse the "mailcow alternatives" section above for the current picks, or visit /alternatives/mailcow for the full list with editorial commentary on each.