Buzz: Popular open-source desktop app that transcribes and translates audio offline on your own computer using OpenAI's Whisper. 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. 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 Buzz when transcribing recorded meetings, interviews, podcasts, or lectures offline matters most, and VITO when capturing and sharing business call details for agents, sales, and small-business owners matters most. Run both through a week of actual calls to see which suits your workflow.
Popular open-source desktop app that transcribes and translates audio offline on your own computer using OpenAI's Whisper.
VITO is a mobile app from ReturnZero that automatically transcribes recorded phone calls into searchable text with speaker labels and summaries, optimized for Korean.
Buzz is a widely used open-source desktop application that transcribes and translates audio offline on the user's personal computer, powered by OpenAI's Whisper. It is MIT-licensed and actively maintained, with v1.4.4 released in March 2026, and it has grown a large community with roughly 19.7k GitHub stars. Buzz runs on macOS, Windows, and Linux, with installation options including Flatpak, Snap, and PyPI. It supports both importing existing audio and video files and real-time transcription from microphone input, and it can export results in formats such as TXT, SRT, and VTT for subtitling and documentation. The app includes an advanced transcript viewer with search and playback controls, a watch folder for automatically transcribing new files, and a command-line interface for automation. It offers GPU acceleration through CUDA for Nvidia cards, Apple Silicon support, and Vulkan for many other GPUs, which makes faster transcription practical even on laptops. Buzz also provides speaker identification and speech separation for noisy audio, plus a plugin system that adds capabilities like AI-generated summaries. Because all processing happens locally, recordings and transcripts remain on the user's machine rather than being uploaded to a cloud service. Pricing varies by plan. Check the official website for current pricing.
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
Buzz 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 | Buzz | VITO |
|---|---|---|
| Core capability | Offline transcription and translation using OpenAI's Whisper | Automatic speech-to-text transcription of recorded phone calls |
| Standout feature | Real-time transcription from microphone input | Speaker identification across multi-party conversations |
| Team usage | Speaker identification and speech separation for noisy audio | Chat-style transcripts with keyword search and segment replay |
| Integrations | Exports to TXT, SRT, and VTT | Call summaries and follow-up reminders |
| Languages & capture | Watch folder for automatic transcription and a command-line interface | Bulk conversion of previously recorded calls |
| Best-fit workflow | GPU acceleration via CUDA, Apple Silicon, and Vulkan | Cloud storage with PC/web access to transcripts across devices |
Buzz
Choose Buzz if you need transcribing recorded meetings, interviews, podcasts, or lectures offline — strengths include fully offline so audio and transcripts stay on the user's computer.
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.
Buzz
VITO
It depends on your workflow. Buzz is strong for transcribing recorded meetings, interviews, podcasts, or lectures offline, while VITO is strong for reviewing and searching the content of past phone calls. Both transcribe and summarize meetings.
Buzz 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.
You can — some teams pair them when each covers a different part of the meeting workflow.
More head-to-head comparisons involving Buzz and VITO.
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