Buzz is a free, open-source Mac desktop application that uses OpenAI's Whisper models to convert spoken audio — from your microphone or from a file — into text, with optional on-device translation into English.
What is Buzz?
Buzz is a native macOS app that wraps OpenAI's Whisper speech-recognition engine in a clean, point-and-click interface, letting you transcribe meetings, podcasts, voice notes, and interviews without sending a single byte to a cloud server. Everything runs locally on your Mac — your audio never leaves your machine.
The project is actively maintained on GitHub and has attracted a large community of contributors precisely because it solves a real problem: Whisper is phenomenally accurate, but running it from the command line is a barrier for most people. Buzz removes that barrier entirely.
What does Buzz do best?
Buzz shines at offline, privacy-respecting transcription of pre-recorded audio files. Drop in an MP3, M4A, WAV, or a video file and Buzz will work through it — typically faster than real-time on Apple Silicon — producing a timestamped transcript you can copy straight into your notes or editor.
Live transcription from the microphone is also supported, which makes it genuinely useful during interviews or lectures when you want a rolling text record alongside your own notes. I've used it to transcribe hour-long research calls, and the accuracy with the medium or large Whisper model is competitive with paid services like Otter.ai or Rev — at zero marginal cost.
- Multiple Whisper model sizes — tiny through large-v3; smaller models are faster, larger models are more accurate. You download whichever you need.
- 40+ languages — transcribe in the original language or translate into English in one pass.
- Export options — plain text, SRT subtitles, VTT, and more; great for captioning your own videos.
- Apple Silicon optimised — the large-v3 model runs comfortably on an M-series chip; Intel Macs work too, just slower.
- Completely offline — no API key, no subscription, no data uploaded anywhere.
Is Buzz free?
Yes — Buzz is entirely free to download and use. It is open-source software released under the MIT licence, available directly from GitHub or via Homebrew Cask (brew install --cask buzz). There is no paid tier, no freemium paywall, and no account required.
The only "cost" is disk space for the Whisper model files, which range from around 75 MB (tiny) to roughly 3 GB (large-v3). Buzz downloads them on first use and caches them locally.
Who should use Buzz?
Journalists, researchers, podcasters, and students are the obvious audience — anyone who regularly converts spoken content to text and doesn't want to pay per-minute transcription fees or hand their recordings to a third-party server. If you've ever copy-pasted a YouTube auto-caption and spent twenty minutes fixing it, Buzz will feel like a revelation.
Developers building voice-driven tooling on macOS will also appreciate having a local Whisper GUI for rapid iteration. And for anyone handling sensitive material — medical notes, legal recordings, confidential interviews — the fully offline model is not just convenient, it's a compliance necessity.
Buzz is not the right choice if you need real-time transcription at scale, speaker diarization (identifying who said what), or deep integration with a workflow tool like Notion or Slack. For those use-cases, look at Whisper Transcription (paid App Store app), MacWhisper, or a hosted service.
How does Buzz compare to MacWhisper?
Both apps are built on the same Whisper engine, so raw accuracy is essentially identical at matching model sizes. MacWhisper has a more polished UI, a paid Pro tier with extra export formats and batch processing, and it ships through the App Store for easy updates. Buzz, being open-source, is rougher around the edges and updates are manual — but it costs nothing, has no feature gating, and its source code is auditable. I keep both installed: MacWhisper for quick drags-and-drops, Buzz when I want to run a large model overnight on a sensitive recording and be certain nothing is phoning home.
What are the best Buzz alternatives?
If Buzz doesn't fit your workflow, the landscape is richer than it was a year ago:
- MacWhisper — the most polished local Whisper GUI; free tier plus paid Pro.
- Whisper Transcription — App Store app with a clean design; one-time purchase.
- Aiko — minimal, iOS-friendly, Apple Silicon native; good for quick voice notes.
- Otter.ai — cloud-based, adds speaker labels and meeting summaries; requires an account.
- Whisper CLI directly — maximum control, zero GUI; for power users comfortable in Terminal.
