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. Otolio: Japanese AI meeting-minutes service (formerly Smart Scribe) that transcribes and automates the full minutes workflow for businesses. Here's where each one pulls ahead on pricing, features, and the meetings it suits best.
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 Otolio when sales teams preparing for and following up on client meetings matters most. Test each on your own meetings; the right choice tends to become obvious quickly.
Carbon Voice is an asynchronous voice-messaging app that automatically transcribes voice memos and uses AI to generate summaries, action items, and documents.
Japanese AI meeting-minutes service (formerly Smart Scribe) that transcribes and automates the full minutes workflow for businesses.
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
Otolio, formerly known as Smart Scribe (スマート書記), is a Japanese AI meeting-minutes service operated by Epicbase, Inc. It is designed for corporate use and automates the entire meeting documentation process rather than only producing a transcript. Users can record in-person meetings or capture audio from web conferencing tools, after which Otolio automatically transcribes the audio and generates summarized, cleaned-up minutes. Features include speaker visualization, registration of specialized terminology for improved accuracy on industry-specific vocabulary, and filler-word removal. The platform organizes recording, transcription, minutes generation, and follow-up tasks within a single interface, and offers specialized agents oriented toward meeting minutes and toward sales preparation and follow-up. Security is positioned as a core concern for Japanese enterprises: Otolio is ISO 27001 certified, uses encryption, and states that it does not perform unauthorized machine learning on user data. A mobile app supports transcription, audio playback, and file upload. Otolio is aimed at Japanese organizations that hold frequent internal meetings, sales calls, one-on-ones, and executive sessions and want to reduce the administrative burden of writing minutes. Pricing varies by plan. Check the official website for current pricing.
Best suited for
Carbon Voice is a free tier with paid upgrades (freemium); Otolio is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | Carbon Voice | Otolio |
|---|---|---|
| Core capability | Automatic transcription of every voice message, made searchable and organizable | Automatic transcription of in-person and web-conference audio |
| Standout feature | AI summaries, catch-ups, and action-item extraction from conversations | AI summarization and cleanup of meeting minutes |
| Team usage | AI document generation (meeting notes, agendas, emails, PRDs, reports) from voice | Speaker visualization and specialized terminology registration |
| Integrations | Transcript clean-up that removes filler words and corrects grammar | Filler-word removal for cleaner transcripts |
| Languages & capture | Cross-platform sync across iOS, Android, Web, and Apple Watch | Dedicated minutes and sales agents in one interface |
| Best-fit workflow | Global Voice automatic translation between languages | Mobile app for transcription, playback, and file upload |
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.
Otolio
Choose Otolio if you need japanese companies automating internal meeting minutes — strengths include built for the japanese market with strong handling of japanese minutes workflows.
Carbon Voice
Otolio
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 Otolio is strong for japanese companies automating internal meeting minutes. Both transcribe and summarize meetings.
Carbon Voice is a free tier with paid upgrades and Otolio is a free tier with paid upgrades. Check each vendor's pricing page for the latest plans and free-tier limits.
Yes. Many teams run more than one meeting assistant when the workflows are complementary.
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