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. Rehearsal: Video-based roleplay and AI practice platform where sales teams rehearse real-world scenarios and get feedback. Which one wins depends on your platform mix, budget, and how hands-off you want notes to be.
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 Rehearsal when certifying reps' messaging through reviewer-scored practice attempts 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.
Video-based roleplay and AI practice platform where sales teams rehearse real-world scenarios and get feedback.
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
Rehearsal is a video-based practice and roleplay platform, developed by ELB Learning, that gives sales teams and other learners a safe environment to practice their selling and communication skills before high-stakes situations. Learners record video responses to real-world scenarios, build the muscle memory needed to perform under pressure, and receive feedback through multiple practice attempts. The platform pairs traditional video roleplay with AI capabilities: an AI-powered feature evaluates learner video responses and provides automated feedback and assessment metrics, complementing human review from mentors and managers. Rehearsal Coaching supports collaborative, iterative learning by letting reviewers leave feedback and allowing learners to retry until they improve, which is useful for objection handling, pitch delivery, and discovery conversations. While the platform is widely used for sales enablement, it also supports adjacent use cases such as customer support training, leadership development, onboarding, and education. The company, founded by Darik Volpa and based in Reno, Nevada, describes itself as privately held and growing, and Rehearsal maintains a presence on review sites such as G2. It is an established, actively operating product suited to organizations that want structured, repeatable video practice with both AI and human feedback loops. Pricing varies by plan. Check the official website for current pricing.
Best suited for
Carbon Voice is a free tier with paid upgrades (freemium); Rehearsal is a free tier with paid upgrades (freemium). Always confirm current pricing on each vendor's site before buying.
| Feature | Carbon Voice | Rehearsal |
|---|---|---|
| Core capability | Automatic transcription of every voice message, made searchable and organizable | Video-based roleplay where learners record responses to scenarios |
| Standout feature | AI summaries, catch-ups, and action-item extraction from conversations | AI evaluation of video responses with automated feedback and metrics |
| Team usage | AI document generation (meeting notes, agendas, emails, PRDs, reports) from voice | Iterative coaching with multiple practice attempts and reviewer feedback |
| Integrations | Transcript clean-up that removes filler words and corrects grammar | Mentor and manager review workflows alongside AI assessment |
| Languages & capture | Cross-platform sync across iOS, Android, Web, and Apple Watch | Scenario library spanning sales, support, leadership, and onboarding |
| Best-fit workflow | Global Voice automatic translation between languages | Anytime, anywhere access for distributed teams |
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.
Rehearsal
Choose Rehearsal if you need rehearsing sales pitches and discovery on video before real meetings — strengths include combines ai assessment with human mentor feedback for richer coaching.
Carbon Voice
Rehearsal
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 Rehearsal is strong for rehearsing sales pitches and discovery on video before real meetings. Both transcribe and summarize meetings.
Carbon Voice is a free tier with paid upgrades and Rehearsal 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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