Rspamd
Rspamd 4.3 fixes SPF evaluation order and rejects weak DKIM keys, with results that change.
Comparison · Comms
Fonoster vs Superhuman
A side-by-side editorial comparison of Fonoster and Superhuman — release velocity, themes, recent moves, and the top alternatives to consider.
Fonoster vs Superhuman: at a glance
| Feature | Fonoster | Superhuman |
|---|---|---|
| Sector | Comms | Comms |
| Velocity score | 7.5 | 5.0 |
| Sparks · 30d | 0 | 0 |
| Top themes | programmable-voice, voice-ai, billing, account-lifecycle | email, mcp, ai assistant, team admin |
| Last editorial update | 2d ago | 2d ago |
| Website | Visit → | — |
What is Fonoster?
Fonoster now cleans up deleted workspaces and stops exposing stored secrets.
Fonoster ships minor versions almost daily. v0.51 to v0.53 added Anthropic, Google and Groq models, TTS voice choice and one-switch call recording. From November 10, v0.54 to v0.56 added branded emails, legal pages, webhook event lookups and API key rotation, and v0.57 returns secret values only to API keys, cancels a deleted user's plan, and ends a deleted workspace's calls and resources.
What is Superhuman?
Superhuman's MCP now lets Claude and ChatGPT attach files, set reminders and share threads.
Superhuman is a premium email client building a calendar, team comments and AI around its mail core. On 11 November its Mail MCP gained four abilities in Claude, ChatGPT and other AI tools: setting follow-up reminders, sending attachments, using private and team snippets, and sharing threads for team comments. The MCP stays on Business and Enterprise plans, a week after a team admin console reached every plan.
Fonoster vs Superhuman: editorial side-by-side
Fonoster
7.5COMMS
Fonoster now cleans up deleted workspaces and stops exposing stored secrets.
◆ Current state
Fonoster ships minor versions almost daily. v0.51 to v0.53 added Anthropic, Google and Groq models, TTS voice choice and one-switch call recording. From November 10, v0.54 to v0.56 added branded emails, legal pages, webhook event lookups and API key rotation, and v0.57 returns secret values only to API keys, cancels a deleted user's plan, and ends a deleted workspace's calls and resources.
◆ Where it's heading
After a quick run of voice-AI options, Fonoster has turned to what a hosted service needs before paying customers rely on it: legal pages, billing correctness, webhook debugging and account deletion that actually removes data. The cadence stays daily and the changes stay incremental.
◆ Prediction
More account and billing lifecycle work is likely next, since v0.57 adds a billing test case and deletion rules in the same release.
Superhuman
5.0COMMS
Superhuman's MCP now lets Claude and ChatGPT attach files, set reminders and share threads.
◆ Current state
Superhuman is a premium email client building a calendar, team comments and AI around its mail core. On 11 November its Mail MCP gained four abilities in Claude, ChatGPT and other AI tools: setting follow-up reminders, sending attachments, using private and team snippets, and sharing threads for team comments. The MCP stays on Business and Enterprise plans, a week after a team admin console reached every plan.
◆ Where it's heading
Superhuman is making its mail features callable from outside AI assistants rather than only from its own app. Each MCP addition maps an existing Superhuman feature, such as reminders, snippets or shared comments, onto a tool an assistant can use, with sharing gated on the user's confirmation. Keeping the MCP on paid team plans ties it to the admin and usage reporting shipped the week before.
◆ Prediction
More Superhuman features exposed through the MCP is the likely next step, with calendar and Auto Labels the obvious gaps; the entries do not show whether the MCP will reach lower plans.
Alternatives to Fonoster 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 Fonoster or Superhuman.
Twilio
Twilio's voice AI stops cutting callers off mid-sentence, using its own turn-taking model.
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.
See all Fonoster alternatives → · See all Superhuman alternatives →
Recent activity from Fonoster and Superhuman
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 2d agoSuperhumanSnippets in Claude, ChatGPT, and MCP ✂️
- 2d agoSuperhumanSharing & Commenting in Claude, ChatGPT, and MCP 🗯️
- 2d agoSuperhumanReminders in Claude, ChatGPT, and MCP ⏰
- 2d agoSuperhumanAttachments in Claude, ChatGPT, and MCP 📎
- 3d agoFonosterv0.57: secrets locked to API keys, full cleanup on account deletion
- 3d agoFonosterv0.56: webhook event bodies visible, API key regenerate becomes rotate
- 3d agoFonosterFonoster v0.55 shows the event each webhook delivery sent
- 3d agoFonosterFonoster v0.54.1 stops gather cutting off early answers
- 3d agoFonosterFonoster v0.54 adds branded emails and legal pages
- 5d agoFonosterFonoster v0.53 adds one-switch call recording and credit usage
- 9d agoSuperhumanAdmin Tools 🛠️
- 21d agoSuperhumanSuperhuman Mail for iPhone Duo
Frequently asked questions
What is the difference between Fonoster and Superhuman?
They serve adjacent needs but don't currently overlap on shipped themes. Fonoster is currently shipping more aggressively (velocity 7.5 vs 5.0), 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 Fonoster better than Superhuman?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Fonoster is currently shipping more aggressively (velocity 7.5 vs 5.0), 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 Fonoster?
Top Fonoster alternatives in Comms are ranked by recent ship velocity. Browse the "Fonoster alternatives" section above for the current picks, or visit /alternatives/fonoster 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.