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Comparison · Comms
Roundcube vs Subsplash
A side-by-side editorial comparison of Roundcube and Subsplash — release velocity, themes, recent moves, and the top alternatives to consider.
Roundcube vs Subsplash: at a glance
| Feature | Roundcube | Subsplash |
|---|---|---|
| Sector | Comms | Comms |
| Velocity score | 5.0 | 6.3 |
| Sparks · 30d | 0 | 1 |
| Top themes | webmail, php, security, oidc | church-management, workflow-automation, natural-language-query, analytics |
| Last editorial update | 1h ago | 18h ago |
| Website | Visit → | — |
What is Roundcube?
After four years, Roundcube 1.7 lands — and the release stream is otherwise all CVEs
Roundcube maintains two lines in lockstep: 1.6 as LTS and 1.7 as stable, with security fixes released to both on the same day. The vulnerability stream is heavy and varied — stored XSS via an unescaped attachment MIME type (CVE-2026-54432), a pre-auth SQL injection in the virtuser_query plugin, CSS injection through SVG animate, SSRF bypasses via local address URLs, an infinite loop in the TNEF decoder. Version 1.7.0, released in May after almost four years of development, is the only feature release in the window.
What is Subsplash?
Subsplash is turning its church dashboard from a record of activity into something that acts.
Subsplash runs a broad church-operations platform — giving, people, events, groups, media and now workflows — and the last quarter has been about layering analysis and automation over that data. Trends AI landed in March as a chart-and-dashboard layer with AI analysis; People Assistant followed in May with natural-language filtering of the congregation; Workflows left beta in July with step-triggered email included for Subsplash One clients. Around those, the window is steady administrative work: group member limits, dashboard registration, an Events Manager role.
Roundcube vs Subsplash: editorial side-by-side
Roundcube
5.0COMMS
After four years, Roundcube 1.7 lands — and the release stream is otherwise all CVEs
◆ Current state
Roundcube maintains two lines in lockstep: 1.6 as LTS and 1.7 as stable, with security fixes released to both on the same day. The vulnerability stream is heavy and varied — stored XSS via an unescaped attachment MIME type (CVE-2026-54432), a pre-auth SQL injection in the virtuser_query plugin, CSS injection through SVG animate, SSRF bypasses via local address URLs, an infinite loop in the TNEF decoder. Version 1.7.0, released in May after almost four years of development, is the only feature release in the window.
◆ Where it's heading
The arc is a long-lived webmail codebase paying down structural risk. 1.7.0's headline changes are defensive rather than user-facing: a mandatory public_html/ entry point so installations aren't exposed by default, improved OAuth2/OIDC support including discovery and logout, removed code bloat and automated code style and quality checks. Everything since has been paired security releases across both lines, several of them reporting classes of bug — sanitizer bypasses, injection through plugin queries — that the 1.7 hardening work is aimed at. Expect the security cadence to stay high while the 1.6 LTS remains supported.
◆ Prediction
Expect continued same-day paired security releases on 1.6 and 1.7, with 1.7.x accruing incremental OIDC and sanitizer hardening before any 1.8 work becomes visible.
Subsplash
6.3COMMS
Subsplash is turning its church dashboard from a record of activity into something that acts.
◆ Current state
Subsplash runs a broad church-operations platform — giving, people, events, groups, media and now workflows — and the last quarter has been about layering analysis and automation over that data. Trends AI landed in March as a chart-and-dashboard layer with AI analysis; People Assistant followed in May with natural-language filtering of the congregation; Workflows left beta in July with step-triggered email included for Subsplash One clients. Around those, the window is steady administrative work: group member limits, dashboard registration, an Events Manager role.
◆ Where it's heading
Two arcs are converging. One makes the data answerable without a spreadsheet or a filter builder; the other makes the platform take action on it, starting with email at a workflow step. Bundling Workflows into Subsplash One instead of pricing it separately says the automation is meant to be table stakes for the top tier and a reason to climb into it — and the AI features carry the same 'talk to your CSM' gate. The administrative releases are the tell that this is a platform serving operators, not enthusiasts.
◆ Prediction
Email is the only action a workflow step can currently take, and Subsplash already owns the church's app and its messaging surfaces — push or SMS from a workflow step is the near-term extension, alongside pointing People Assistant's plain-language filters at who enters a workflow in the first place.
Alternatives to Roundcube 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 Roundcube or Subsplash.
Mailu
A mail server whose entire visible output is patching other people's code.
Signal Desktop
Signal's beta train is quietly handing group admins real moderation powers.
Notion
Notion is turning itself into the place other companies' agents come to work.
Slack
Slack's app platform is being rebuilt around agents, with the SDKs clearing old ground behind it.
Bird
Monthly digests showing AI chat latency cut hard, in a feed that repeats itself
See all Roundcube alternatives → · See all Subsplash alternatives →
Recent activity from Roundcube and Subsplash
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 1d agoSubsplashBe notified by email when a Workflow Card is complete
- 14d agoSubsplashIntroducing Group Member Limits + Group Finder Improvements
- 16d agoSubsplashEmail Automations for Workflows ⚡
- 22d agoSubsplashRegister Guests & Waive Payments from Dashboard
- 26d agoRoundcubeRoundcube LTS patches attachment XSS, SSRF and a TNEF loop
- 26d agoRoundcubeRoundcube 1.7 gets the same attachment XSS and SSRF fixes
- 1mo agoSubsplashMedia and Campaign Data in Trends AI
- 1mo agoRoundcubeRoundcube LTS fixes a pre-auth SQL injection in virtuser_query
- 1mo agoRoundcubeRoundcube 1.7.1 carries the pre-auth SQL injection fixes
- 2mo agoSubsplashPeople Assistant: AI-Powered Filtering ⚡
- 2mo agoRoundcubeRoundcube Webmail 1.7.0 ⚡
- 4mo agoRoundcubeRoundcube 1.6.15 fixes an SVG animate bypass and search regressions
Frequently asked questions
What is the difference between Roundcube and Subsplash?
They serve adjacent needs but don't currently overlap on shipped themes. Subsplash is currently shipping more aggressively (velocity 6.3 vs 5.0), 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 Roundcube better than Subsplash?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Subsplash is currently shipping more aggressively (velocity 6.3 vs 5.0), 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 Roundcube?
Top Roundcube alternatives in Comms are ranked by recent ship velocity. Browse the "Roundcube alternatives" section above for the current picks, or visit /alternatives/roundcube 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.