No. 01Privacy
Fully Local
Speech recognition runs on your Mac. MumbleFlow does not upload your dictation audio to a cloud transcription service.
MUMBLEFLOW
Local STT. Offline dictation for Mac.
Turn speech into text on your Mac with whisper.cpp. Your dictation audio stays on your device. Works offline after setup, with local text cleanup. macOS 14+ · $5 once · No subscription.
What is local STT? Read the speech-to-text guide →01 / Features
WHY MUMBLEFLOW
02 / How It Works
SIMPLE BY DESIGN
Five steps from hotkey to text. No cloud. No subscription. Just your voice.
Step 1 — Activate
Press Hotkey
Press Fn anywhere. MumbleFlow starts listening instantly with a floating bar indicator.
Step 2 — Dictate
Speak Naturally
Talk like you normally would. The waveform shows your audio in real-time.
Step 3 — Transcribe
Local Transcription
whisper.cpp transcribes your speech on your Mac. No internet needed for transcription after model setup.
Step 4 — Polish
Smart Text Cleanup
Local LLM cleans up punctuation, grammar, and formatting automatically.
Step 5 — Output
Text Injected
Your transcribed text is pasted directly at your cursor position. Works in any app.
Before You Disconnect
Ready to Work Offline
Download the app and required models while online. Then test dictation in a local document with Wi-Fi off. Purchases and updates still need a connection.
03 / Principles
WHAT WE BELIEVE
PRIVACY FIRST
MumbleFlow processes dictation audio and text cleanup on your Mac. You decide which app receives the result; that app's own storage and sync settings still apply.
SPEED MATTERS
Local transcription powered by whisper.cpp with Metal acceleration. No network round trip for recognition; performance depends on your Mac and recording.
OWN YOUR TOOLS
A $5 one-time purchase with no recurring subscription. Your own hardware runs the speech recognition and text cleanup.
MAC FIRST
Available on macOS now. Windows and Linux support are coming soon. Any app, any text field. Press the hotkey and speak. It just works.
04 / Learn
A practical guide to local STT
Local STT converts speech to text on your own computer. Find out how it works, set up offline dictation on your Mac, and understand where your audio and text go.
MumbleFlow questions, answered
What is local STT?
Local STT means local speech to text: a speech recognition model converts audio into text on your own computer. MumbleFlow uses whisper.cpp to do this on your Mac instead of uploading dictation audio to a transcription server.
Does MumbleFlow work offline?
Yes, dictation and text cleanup run on your Mac after the app and required models are downloaded. You need internet for the initial purchase, downloads, and software updates, but not for everyday transcription.
Which computers does MumbleFlow support?
MumbleFlow is available for macOS 14 or later. Windows and Linux versions are not available yet. Check that the current download supports your Mac before purchasing.
How much does MumbleFlow cost?
MumbleFlow costs $5 as a one-time purchase. There is no recurring subscription for the app.
Can I dictate into other apps?
MumbleFlow uses a global hotkey and inserts transcribed text at your cursor. Place the cursor in an editable text field and grant the permissions the app requests. An app that syncs your documents can still upload the resulting text.
05 / Colophon
CREDITS
Built by
- MumbleFlow Team
Tech
- Tauri 2.0
- Rust
- whisper.cpp
- llama.cpp
Platform
- macOS 14+
- Windows (coming soon)
- Linux (coming soon)
Price
- $5 One-Time Purchase
- No subscription
Contact
Year
- 2025
- Ongoing
© 2025–2026 MumbleFlow. All rights reserved.
Built with Rust. Designed for privacy.