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Comparison · Comms
Roundcube vs Rspamd
A side-by-side editorial comparison of Roundcube and Rspamd — release velocity, themes, recent moves, and the top alternatives to consider.
Roundcube vs Rspamd: at a glance
What is Roundcube?
Roundcube patches its Sieve filters and CSRF checks in a sixth paired security release
Roundcube shipped 1.7.6 and 1.6.21 on 9 November, three weeks after 1.7.5 and 1.6.20, again as an identical security pair. This round centres on the managesieve filter plugin (two script-injection paths and destructive actions triggerable cross-site via GET), plus CSRF bypasses, an open redirect, an SSRF bypass via nip.io and sslip.io hostnames and a disabled_actions bypass.
What is Rspamd?
Rspamd 4.3 fixes SPF evaluation order and rejects weak DKIM keys, with results that change.
Rspamd 4.3.0 on November 13 is a correctness release with a long incompatible-changes list. SPF records are now evaluated in term order, closing a case where an explicit -ip4 deny could be overridden by a broader allow. DKIM rejects RSA keys under 1024 bits and signatures with duplicate tags, DMARC no longer drops a policy over an unknown tag, URL mismatches are scored apart from phishing, and PDF text extraction and archive unpacking change their output. Critical fixes cover a header line that could abort a worker from one unauthenticated HTTP request.
Roundcube vs Rspamd: editorial side-by-side
Roundcube
5.0COMMS
Roundcube patches its Sieve filters and CSRF checks in a sixth paired security release
◆ Current state
Roundcube shipped 1.7.6 and 1.6.21 on 9 November, three weeks after 1.7.5 and 1.6.20, again as an identical security pair. This round centres on the managesieve filter plugin (two script-injection paths and destructive actions triggerable cross-site via GET), plus CSRF bypasses, an open redirect, an SSRF bypass via nip.io and sslip.io hostnames and a disabled_actions bypass.
◆ Where it's heading
Security releases now arrive every three to five weeks, each with a dozen or more externally reported fixes, and the same research group is behind many of them. The project is in a sustained audit phase, and both branches move together every time.
◆ Prediction
Another paired 1.7.x and 1.6.x security release within about a month is the most likely next entry, given the cadence since June.
Rspamd
5.0COMMS
Rspamd 4.3 fixes SPF evaluation order and rejects weak DKIM keys, with results that change.
◆ Current state
Rspamd 4.3.0 on November 13 is a correctness release with a long incompatible-changes list. SPF records are now evaluated in term order, closing a case where an explicit -ip4 deny could be overridden by a broader allow. DKIM rejects RSA keys under 1024 bits and signatures with duplicate tags, DMARC no longer drops a policy over an unknown tag, URL mismatches are scored apart from phishing, and PDF text extraction and archive unpacking change their output. Critical fixes cover a header line that could abort a worker from one unauthenticated HTTP request.
◆ Where it's heading
Since 4.1, every release has hardened parsers and closed memory-safety and trust gaps; 4.3 applies the same pass to the authentication standards themselves (SPF, DKIM, DMARC, ARC) and to content extraction. Operators should expect scores and fuzzy hashes to shift after upgrading, because the project now favours spec-correct results over backward-compatible ones.
◆ Prediction
A 4.3.x point release fixing regressions from these behaviour changes is the likely next step, as 4.2.1 followed 4.2.0 within two weeks.
Alternatives to Roundcube and Rspamd
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 Rspamd.
Salesmsg
Salesmsg adds call-back requests and a one-click Emergency Stop for all outbound texts.
Element
Element 1.12.35 follows the call picture-in-picture release with one desktop storage fix.
Krisp
Krisp moves call transcripts and live captions to cloud transcription in KrispCX 2.84.4.
Misskey
Misskey 2026.11 ships: a leaner start script, and Node.js 22 no longer boots.
SlickText
SlickText's feed is all SMS buying guides; no product release has surfaced since RCS.
See all Roundcube alternatives → · See all Rspamd alternatives →
Recent activity from Roundcube and Rspamd
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 21h agoRspamd4.3.0: SPF order fix, stricter DKIM, new truncation symbols
- 4d agoRoundcubeRoundcube Webmail 1.7.6
- 4d agoRoundcubeRoundcube Webmail 1.6.21
- 24d agoRspamd4.2.3: ARC trust fix, merged RBL queries, browser-style HTML parsing
- 26d agoRoundcubeRoundcube Webmail 1.7.5
- 26d agoRoundcubeRoundcube Webmail 1.6.20
- 1mo agoRspamd4.2.2: crypto wallet detection and changed MIME digests
- 1mo agoRspamd4.2.1: critical HTTP and memory-safety fixes
- 1mo agoRspamd4.2.0: public suffix lookup and attachment content extraction
- 2mo agoRoundcubeRoundcube Webmail 1.7.4
- 2mo agoRoundcubeRoundcube Webmail 1.6.19
- 3mo agoRspamdCloses an arbitrary file read reachable by any TCP client
Frequently asked questions
What is the difference between Roundcube and Rspamd?
They serve adjacent needs but don't currently overlap on shipped themes. Roundcube and Rspamd 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 Roundcube better than Rspamd?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Roundcube and Rspamd 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 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 Rspamd?
Top Rspamd alternatives in Comms are ranked by recent ship velocity. Browse the "Rspamd alternatives" section above for the current picks, or visit /alternatives/rspamd for the full list with editorial commentary on each.