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Rspamd 4.3 fixes SPF evaluation order and rejects weak DKIM keys, with results that change.
Comparison · Comms
Fonoster vs Shortwave
A side-by-side editorial comparison of Fonoster and Shortwave — release velocity, themes, recent moves, and the top alternatives to consider.
Fonoster vs Shortwave: at a glance
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 Shortwave?
Shortwave keeps folding autonomy into the inbox, one AI action at a time.
Shortwave has moved decisively from an AI-assisted email client to an inbox that acts on the user's behalf. The assistant reads, drafts, organizes, and — via the Tasklet integration — triggers automated workflows across thousands of apps, with its work surfaced inside Shortwave rather than buried in Gmail. Every release since late 2024 has pushed more of the email workflow out of the user's hands and into the model's.
Fonoster vs Shortwave: 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.
Shortwave
0.0COMMS
Shortwave keeps folding autonomy into the inbox, one AI action at a time.
◆ Current state
Shortwave has moved decisively from an AI-assisted email client to an inbox that acts on the user's behalf. The assistant reads, drafts, organizes, and — via the Tasklet integration — triggers automated workflows across thousands of apps, with its work surfaced inside Shortwave rather than buried in Gmail. Every release since late 2024 has pushed more of the email workflow out of the user's hands and into the model's.
◆ Where it's heading
The direction is a steadily widening action surface: MCP connectors to external tools, AI Memories, voice, and now trigger-based automation all frame email as an agent runtime rather than a reading pane. Model choices track the frontier closely — Claude 3.7 to Sonnet 4 to the 4.6 family — keeping capability tied to whatever the best available model can do. The team ships broadly across web, desktop, iOS, and Android each cycle.
◆ Prediction
The next moves most likely deepen autonomous execution — more trigger types and tighter loops where the assistant acts with less confirmation — rather than adding new surface features.
Alternatives to Fonoster and Shortwave
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 Shortwave.
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 Shortwave alternatives →
Recent activity from Fonoster and Shortwave
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 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
- 8mo agoShortwaveUpgraded to Claude Sonnet & Opus 4.6
- 10mo agoShortwaveFully automate your email with Tasklet 🔗 ⚡
- 1y agoShortwaveEnhanced AI performance & collaboration
- 1y agoShortwaveIntegrate the AI with all your apps 🔌 ⚡
- 1y agoShortwaveTalk to your inbox 🎙️
- 1y agoShortwaveOrganize your inbox with AI ✨
Frequently asked questions
What is the difference between Fonoster and Shortwave?
They serve adjacent needs but don't currently overlap on shipped themes. Fonoster is currently shipping more aggressively (velocity 7.5 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 Fonoster better than Shortwave?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Fonoster is currently shipping more aggressively (velocity 7.5 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 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 Shortwave?
Top Shortwave alternatives in Comms are ranked by recent ship velocity. Browse the "Shortwave alternatives" section above for the current picks, or visit /alternatives/shortwave for the full list with editorial commentary on each.