Why Whisper
When You Can Murmur
Voice dictation that runs entirely on your Mac. Speak naturally, get polished text. No data ever leaves your computer.
Your voice app knows
everything about you.
Cloud-based dictation tools don't just transcribe your voice. They record what apps you use, what's on your screen, what's in your text fields, and send it all to remote servers. Here's what they collect — and what MurmurFlow doesn't.
Raw Audio
Your voice recordings are uploaded to remote servers for processing. Every word you speak is transmitted.
Audio never leaves your Mac. Processed by Apple's Neural Engine.
Screenshots & OCR
Feature-flagged screen capture reads what's visible on your display. An "OCR context" payload is assembled and sent upstream.
We never access your screen. Zero visual capture, period.
App & URL Tracking
Every app you use, every URL you visit, every window title — logged per utterance. Hundreds of records per app.
App context stays on-device for better transcription. Never uploaded.
Textbox Contents
The full contents of your active text field — including commands, passwords, and credentials — are extracted and sent.
We read text fields locally for context. Nothing is transmitted.
Personal Identity
Your name, email, and device ID are attached to every single transcription request sent to their servers.
No accounts. No sign-up. We don't even know who you are.
Analytics & Telemetry
Usage events, error reports to Sentry, performance metrics — all remotely tunable via feature flags you can't see.
Zero telemetry. Zero analytics. No feature flags. No callbacks.
40+
server endpoints receiving your data
0
server endpoints. Everything stays on your Mac.
Everything happens on your Mac
No servers, no subscriptions, no compromises. Just your voice and your machine.
On-Device AI
Apple's Neural Engine processes everything locally. No API keys, no internet required, no recurring fees.
Privacy by Design
Your voice never leaves your Mac. Zero telemetry, zero cloud processing. Your words are yours alone.
Streaming Transcription
See your words appear in real-time as you speak. No waiting for processing after you stop.
Self-Learning Dictionary
Automatically learns names, jargon, and corrections from your edits. Gets smarter the more you use it.
Works Everywhere
Dictate into any app — iMessage, Slack, VS Code, your browser. If you can type in it, you can speak to it.
Smart Cleanup
AI removes filler words, adds punctuation, fixes capitalization. Raw speech becomes polished writing instantly.
Four steps.
Zero cloud.
Speak
Hold your hotkey and talk naturally. MurmurFlow captures audio through your Mac's microphone.
Transcribe
WhisperKit runs on Apple's Neural Engine — converting speech to text in real-time, entirely on-device.
Polish
Apple Intelligence cleans up filler words, fixes grammar, adds punctuation, and applies your custom dictionary.
Paste
Clean text is inserted directly into the active app — iMessage, Slack, your browser, anywhere you can type.
You said:
“so I was thinking we should like meet up on thursday and uh discuss the project you know”
MurmurFlow types:
I was thinking we should meet up on Thursday and discuss the project.
Ditch Whisper.
Keep everything.
One click imports your entire dictionary, corrections, and context from Wispr Flow. Switch in seconds, not hours.
Custom Dictionary
All your names, jargon, and custom terms
Learned Corrections
Word corrections and spelling preferences
Phrase Shortcuts
Multi-word replacements and abbreviations
Reads your Wispr Flow data locally — nothing is uploaded.
Your voice. Your Mac.
Nobody else.
Other voice tools send your audio to the cloud. We think that's a bad idea. MurmurFlow processes everything on Apple Silicon's Neural Engine.
No Internet Required
Works completely offline. Airplane mode? Still works.
Zero Telemetry
No analytics, no tracking, no usage data collected. Ever.
Local Storage Only
Transcriptions and learned corrections stay in your Mac's local database.
No Account Needed
No sign-up, no login, no email. Download and start talking.
Cloud-based tools
- ✗Audio uploaded to servers
- ✗Requires internet connection
- ✗Monthly subscriptions
- ✗Account & data collection
MurmurFlow
- ✓100% on-device processing
- ✓Works completely offline
- ✓$20 one-time purchase
- ✓No account, no tracking
Get early access
Join the waitlist for free Early Access. We'll email you when MurmurFlow is ready.
After Early Access: $20 one-time purchase. Refer a friend and get $5 off.
Requires macOS 14+ and Apple Silicon (M1 or later)