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Murmur, the AI voice agent your Mac was missing.

Think out loud at 150+ WPM. Auto-strips filler words, hesitations, and stutters in real time. Universal hotkey ⌃⌥D (Ctrl+Opt+D) dictates directly into Slack, Notion, VS Code, and Apple Mail — powered by OpenAI Whisper on the Apple Silicon Neural Engine.

Download for Mac (v1.0.1 DMG) GitHub Source

Universal Binary (macOS 14+) Apple Silicon Neural Engine 100% On-Device Whisper Zero Telemetry

Murmur's notes library showing transcribed meetings with AI executive summaries

Voice into Action

Here is your thought. Cleaned in real time.

Click any beat to see how Murmur processes and polishes your speech directly on the Apple Neural Engine.

⌃⌥D · CTRL+OPT+D

Universal system-wide dictation.

Press ⌃⌥D anywhere. A floating liquid-glass HUD appears, listens, and types clean, punctuated sentences straight into Slack, Notion, VS Code, or Apple Mail.

SMART CLEAN

Automatic filler & stutter stripper.

Hesitation sounds (um, uh, er), repeated words, and discourse padding (you know, basically) are automatically detected and stripped live before text touches your document.

2-WAY CALLS

Microphone and system audio combined.

Record your voice and your Mac's internal audio output together. Zoom, Microsoft Teams, and Google Meet conversations are synchronized into one searchable transcript.

LOCAL VAULT

Executive summaries & action items.

Transcripts are automatically indexed in a local Markdown library with one-click copy, tag management, and search. Zero data ever leaves your device.

Murmur — Universal ⌃⌥D HUD

Focused: Slack / VS Code

System-Wide Injection Active

“Let’s schedule our release sprint review for this Thursday at 10 AM and finalize the remaining App Store Connect assets.”

Engineered for Focus

Built for the way you already think.

Always one click away in your menu bar.

Murmur sits discreetly in your macOS menu bar. Inspect real-time audio waveforms, toggle Smart Clean modes, and jump into recent meeting recordings without leaving your workspace.

✓ Global Hotkey: Press ⌃⌥D (Ctrl+Opt+D) to dictate without opening a new window.
✓ Live Self-Correction: Words update contextually as sentences finish.
✓ Instant Notes Vault: Access recent voice memos and meeting summaries.

Murmur menu bar popover showing live dictation

Tune the AI Engine to your voice and cadence.

Choose between OpenAI's Whisper model (via WhisperKit) on the Apple Neural Engine or Apple's built-in Speech framework. Customize punctuation, capitalization, and filter sensitivity:

✓ Filter Sensitivity: Off, Light, Standard, or Aggressive filler removal.
✓ Model Selection: WhisperKit for high accuracy or Apple Speech for light battery draw.
✓ Automatic Punctuation: Intelligently handles commas, periods, question marks, and paragraphs.

Murmur AI Engine and Whisper settings panel

Keyboard Reference

Speed at your fingertips.

Press any key combination on your keyboard, or click the tactile buttons below:

⌃⌥D (Ctrl+Opt+D) — Toggles the liquid-glass dictation HUD anywhere on your Mac. Starts listening instantly.

Yours, and only yours.

100% On-Device Whisper.

Speech recognition runs entirely on Apple Silicon Neural Engine via WhisperKit. Zero audio, transcripts, or personal data ever touch an external cloud server.

Offline-first by design.

The base Whisper model (~147MB) ships bundled inside the application package. Murmur operates with full transcription power on flights, subways, or offline retreats.

Zero subscriptions or ads.

100% free and open source under the MIT license. No API token fees, no usage subscriptions, and zero telemetry analytics.

Setup

One drag. Then start talking.

Available as an Apple-notarized DMG installer or terminal command.

# Double-click mounted DMG, drag Murmur into Applications

$ open Murmur-1.0.1.dmg

mounts the notarized disk image

# Launch Murmur directly from Spotlight or Applications

$ open -a Murmur

launches liquid-glass voice agent

Stop typing. Start talking.

Dictate at the speed of thought. Automatically removes filler words and stutters in real time. 100% on-device Whisper on Apple Silicon. Free and open source.

Download Murmur for Mac (v1.0.1 DMG)

Runs on macOS 14.0+ Sonoma & macOS 15.0+ Sequoia · Apple Silicon (M1–M4) · 100% Free & Open Source