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. VITO: VITO is a mobile app from ReturnZero that automatically transcribes recorded phone calls into searchable text with speaker labels and summaries, optimized for Korean. 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 VITO when capturing and sharing business call details for agents, sales, and small-business owners matters most. Trial each on a few real meetings before you commit — the better fit usually shows fast.
Carbon Voice is an asynchronous voice-messaging app that automatically transcribes voice memos and uses AI to generate summaries, action items, and documents.
VITO is a mobile app from ReturnZero that automatically transcribes recorded phone calls into searchable text with speaker labels and summaries, optimized for Korean.
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
VITO (비토) is a call-transcription app developed by ReturnZero Inc. (리턴제로), a Seoul-based speech-AI company. It automatically converts recorded phone calls into readable, chat-style text using ReturnZero's proprietary speech-recognition engine tuned for conversational Korean. Rather than joining live virtual meetings as a bot, VITO works from a phone's call-recording function: once a call is recorded, the audio is transcribed, with speaker identification distinguishing participants, and users can later read, keyword-search, replay specific segments, and review summaries of past conversations. It also supports bulk conversion of previously recorded calls. VITO is available on iOS and Android, with PC/web access to view transcripts, and offers cloud storage so call history is preserved across devices. The company also exposes its underlying RTZR speech-to-text technology as a separate developer API. VITO is aimed at everyday users and professionals such as real-estate agents, delivery drivers, office workers, students, and small-business owners who need to revisit, search, or share the content of their phone conversations.
Best suited for
Carbon Voice is a free tier with paid upgrades (freemium); VITO is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | Carbon Voice | VITO |
|---|---|---|
| Core capability | Automatic transcription of every voice message, made searchable and organizable | Automatic speech-to-text transcription of recorded phone calls |
| Standout feature | AI summaries, catch-ups, and action-item extraction from conversations | Speaker identification across multi-party conversations |
| Team usage | AI document generation (meeting notes, agendas, emails, PRDs, reports) from voice | Chat-style transcripts with keyword search and segment replay |
| Integrations | Transcript clean-up that removes filler words and corrects grammar | Call summaries and follow-up reminders |
| Languages & capture | Cross-platform sync across iOS, Android, Web, and Apple Watch | Bulk conversion of previously recorded calls |
| Best-fit workflow | Global Voice automatic translation between languages | Cloud storage with PC/web access to transcripts across devices |
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.
VITO
Choose VITO if you need reviewing and searching the content of past phone calls — strengths include strong korean speech recognition from returnzero's proprietary stt engine.
Carbon Voice
VITO
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 VITO is strong for reviewing and searching the content of past phone calls. Both transcribe and summarize meetings.
Carbon Voice is a free tier with paid upgrades and VITO 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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