Element
Element Web rolls Module API v2 across its plugin suite alongside room list redesign
Comparison · Comms
Rspamd vs Superhuman
A side-by-side editorial comparison of Rspamd and Superhuman — release velocity, themes, recent moves, and the top alternatives to consider.
Rspamd vs Superhuman: at a glance
| Feature | Rspamd | Superhuman |
|---|---|---|
| Sector | Comms | Comms |
| Velocity score | 5.0 | 6.3 |
| Sparks · 30d | 0 | 1 |
| Top themes | spam filtering, input hardening, fuzzy matching, pdf extraction | ai-drafting, calendar-integration, mcp, mobile |
| Last editorial update | 1mo ago | 4d ago |
| Website | Visit → | — |
What is Rspamd?
Rspamd closed a file-read hole any TCP client could reach, and taught the PDF parser to read fonts.
Rspamd's 4.1.x line is running two tracks at once: extending the neural and fuzzy subsystems it rebuilt earlier in the cycle, and auditing its own attack surface. 4.1.5 continues both — fuzzy storages now receive sender authentication facts over encrypted rules, the PDF parser decodes text through font encodings and ToUnicode CMaps, and the protocol gates File, Path and Shm message sources that any TCP client could previously use to have arbitrary files parsed. That gate ships as an opt-out now and an opt-in later.
What is Superhuman?
Superhuman rebuilt its mobile apps and wired every inbox into AI assistants — the email client is becoming a suite.
Superhuman has evolved from a keyboard-shortcut email client into an AI-native communication platform covering email, calendar, and AI drafting agents — all gated on Business/Enterprise tiers. The mobile apps, long a weak point relative to desktop, received their first major overhaul in years with a redesigned navigation model and native iOS/Android aesthetics. MCP support with multi-account access is live, letting AI assistants like Claude and ChatGPT operate across all connected inboxes simultaneously. Calendar coverage now spans desktop, Android, and iOS with room booking and multi-day views.
Rspamd vs Superhuman: editorial side-by-side
Rspamd
5.0COMMS
Rspamd closed a file-read hole any TCP client could reach, and taught the PDF parser to read fonts.
◆ Current state
Rspamd's 4.1.x line is running two tracks at once: extending the neural and fuzzy subsystems it rebuilt earlier in the cycle, and auditing its own attack surface. 4.1.5 continues both — fuzzy storages now receive sender authentication facts over encrypted rules, the PDF parser decodes text through font encodings and ToUnicode CMaps, and the protocol gates File, Path and Shm message sources that any TCP client could previously use to have arbitrary files parsed. That gate ships as an opt-out now and an opt-in later.
◆ Where it's heading
Every release in this window has carried at least one security fix in the same class: a controller accepting any password on a malformed hash, a DKIM out-of-bounds read, MIME recursion depth, and now unauthenticated file reads. The project is systematically walking its own input paths rather than reacting to individual reports. Alongside it, the fuzzy subsystem keeps gaining structure — diagnostics, persisted shingle sets, and now shared sender reputation signals — turning what was a hash-match check into a scored, introspectable component.
◆ Prediction
The stated plan to flip allow_file_and_shm_inputs to false in the next major release makes that the visible breaking change to prepare for. Expect the fuzzy work to keep consolidating, since sharing SPF, DKIM and DMARC state with storages sets up cross-sender scoring that the current per-hash matching cannot express.
Superhuman
6.3COMMS
Superhuman rebuilt its mobile apps and wired every inbox into AI assistants — the email client is becoming a suite.
◆ Current state
Superhuman has evolved from a keyboard-shortcut email client into an AI-native communication platform covering email, calendar, and AI drafting agents — all gated on Business/Enterprise tiers. The mobile apps, long a weak point relative to desktop, received their first major overhaul in years with a redesigned navigation model and native iOS/Android aesthetics. MCP support with multi-account access is live, letting AI assistants like Claude and ChatGPT operate across all connected inboxes simultaneously. Calendar coverage now spans desktop, Android, and iOS with room booking and multi-day views.
◆ Where it's heading
Superhuman is building toward a unified communication suite — the rebranded 'Superhuman Mail' name explicitly anticipates Mail, Docs, and Go as sibling products. The heavy investment in calendar (rooms, Android, multi-day iOS views) signals calendar parity with email as a near-term priority. AI drafting is moving toward full automation: Auto Drafts 2.0 already completes 60% of replies without editing, and the team has announced a voice mode and a rewritten email engine as the next milestones.
◆ Prediction
Voice mode and a rewritten email engine are both on the stated roadmap. The most likely next shipping moment is deeper tool integrations for Auto Drafts — Slack and meeting-notes context were specifically teased — which would close the gap between drafting and the rest of a user's work context.
Alternatives to Rspamd and Superhuman
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 Rspamd or Superhuman.
Canary Mail
Canary Mail adds real-time inbox translation and persistent AI chat history across iOS and macOS.
Twilio
Twilio grafts ElevenLabs AI voices onto TwiML and expands its Salesforce omnichannel reach.
Salesmsg
Salesmsg adds NPS surveys to SMS conversations and expands AI agent action repertoire
Chatwoot
Chatwoot is building an AI-first support platform, with Captain gaining audience targeting and macro automation reaching the keyboard-native workflow.
Signal Desktop
Signal adds granular notification controls: badge content, muted threads, restore defaults
See all Rspamd alternatives → · See all Superhuman alternatives →
Recent activity from Rspamd and Superhuman
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 5d agoSuperhumanMeeting Rooms 📆
- 11d agoSuperhumanOutlook categories 🏷️
- 19d agoSuperhumanSuperhuman Mail for iOS & Android 📱 ⚡
- 19d agoSuperhumanA fresh look for Superhuman Mail ✨
- 27d agoSuperhumanLabels on drafts sync with Gmail 🔄
- 1mo agoRspamdCloses an arbitrary file read reachable by any TCP client
- 1mo agoSuperhumanMultiple email accounts in Claude, ChatGPT, and MCP 🤖 ⚡
- 1mo agoRspamdController accepted any password on a malformed hash
- 1mo agoRspamdFuzzy diagnostics API, and jQuery dropped from the WebUI
- 2mo agoRspamdStatic embedding neural provider and composite Lua conditions
- 3mo agoRspamdPluggable neural feature and architecture registries ⚡
- 3mo agoRspamdLoad-aware upstream selection and chain-aware URL resolution
Frequently asked questions
What is the difference between Rspamd and Superhuman?
They serve adjacent needs but don't currently overlap on shipped themes. Superhuman 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 Rspamd better than Superhuman?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Superhuman 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 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.
What are the best alternatives to Superhuman?
Top Superhuman alternatives in Comms are ranked by recent ship velocity. Browse the "Superhuman alternatives" section above for the current picks, or visit /alternatives/superhuman for the full list with editorial commentary on each.