Carbon Voice: Carbon Voice is an asynchronous voice-messaging app that automatically transcribes voice memos and uses AI to generate summaries, action items, and documents. Sotto: Sotto is a native macOS voice-to-text dictation app that turns speech into text system-wide using local AI transcription models. The right pick comes down to team size, budget, and the workflows you want to automate.
How Hosiqo compares and tests toolsFinal recommendation
Shortlist Carbon Voice when replacing status meetings and calls with async voice messages that get auto-transcribed and summarized matters most, and Sotto when privacy-first transcription of imported audio recordings on-device matters most. Run both through a week of actual calls to see which suits your workflow.
Carbon Voice is an asynchronous voice-messaging app that automatically transcribes voice memos and uses AI to generate summaries, action items, and documents.
Sotto is a native macOS voice-to-text dictation app that turns speech into text system-wide using local AI transcription models.
Carbon Voice is an asynchronous voice-messaging and voice-notes app for iOS, Android, Web, and Apple Watch. Users record voice memos or messages with a single keystroke or swipe, and every message is automatically transcribed so it can be read, searched, labeled, and organized. The app is built around reducing real-time meetings and calls: instead of scheduling synchronous time, teammates exchange voice messages that the recipient can catch up on later. Layered on top is a large library of AI actions that turn raw voice into structured content — bulleted summaries, cleaned-up transcripts (removing filler words and fixing grammar), meeting notes, agendas, action items, professional emails, and longer documents such as PRDs and reports. Users can also query an AI assistant about any chat. A Global Voice feature can translate messages between languages, and messages can be sent to people who don't have the app via a secure email link. It is aimed at distributed teams, managers, and individuals who prefer talking over typing.
Best suited for
Sotto is a native Swift dictation app for macOS 13 and later that converts speech to text in real time. It works as a system-wide push-to-talk layer: the user holds a hotkey, speaks, and Sotto inserts clean text into whatever app is in focus, from Slack and Notion to Xcode and email fields. Audio is transcribed by local engines, including OpenAI Whisper models (Tiny through Large V3 Turbo and Distil Large V3) and NVIDIA Parakeet v2/v3, so by default recordings never leave the Mac; users can optionally connect cloud providers such as OpenAI or Groq with their own API keys for added accuracy. Beyond live dictation, it can import and re-transcribe audio files, supports 90+ languages, keeps a searchable history of recordings with timestamps, and offers a custom vocabulary dictionary. One-click AI processing can rewrite, summarize, translate, or reformat dictated text. It is aimed at developers, writers, and privacy-conscious professionals who want fast, local voice input rather than a cloud meeting-bot service.
Best suited for
Carbon Voice is a free tier with paid upgrades (freemium); Sotto is a free tier with paid upgrades (paid). Always confirm current pricing on each vendor's site before buying.
| Feature | Carbon Voice | Sotto |
|---|---|---|
| Core capability | Automatic transcription of every voice message, made searchable and organizable | System-wide push-to-talk dictation that inserts text into any app |
| Standout feature | AI summaries, catch-ups, and action-item extraction from conversations | Local on-device transcription via Whisper and NVIDIA Parakeet models |
| Team usage | AI document generation (meeting notes, agendas, emails, PRDs, reports) from voice | Audio file import and re-transcription with searchable, timestamped history |
| Integrations | Transcript clean-up that removes filler words and corrects grammar | Support for 90+ languages with per-language hotkeys |
| Languages & capture | Cross-platform sync across iOS, Android, Web, and Apple Watch | One-click AI processing to summarize, translate, or rewrite dictated text |
| Best-fit workflow | Global Voice automatic translation between languages | Optional cloud transcription via user-supplied OpenAI or Groq API keys |
Carbon Voice
Choose Carbon Voice if you need replacing status meetings and calls with async voice messages that get auto-transcribed and summarized — strengths include combines voice capture, automatic transcription, and a broad set of ai summarization/document actions in one app.
Sotto
Choose Sotto if you need hands-free dictation of emails, messages, and documents across mac apps — strengths include local processing keeps audio on-device for strong privacy.
Carbon Voice
Sotto
It depends on your workflow. Carbon Voice is strong for replacing status meetings and calls with async voice messages that get auto-transcribed and summarized, while Sotto is strong for hands-free dictation of emails, messages, and documents across mac apps. Both transcribe and summarize meetings.
Carbon Voice is a free tier with paid upgrades and Sotto is a free tier with paid upgrades. Check each vendor's pricing page for the latest plans and free-tier limits.
Sure. Running both makes sense when their strengths don't overlap and the budget allows.
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