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The 100% Free & Open-Source Wispr Flow + Otter.ai Alternative. Local Whisper Voice Dictation, Dynamic Island & Notch UI, Screen AI Assistant & Notes for macOS & Windows.

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MurMur App Icon

MurMur: Ambient AI Voice & Assistant Operating System 🎙️⚡

Lightning-fast local Whisper dictation, Dynamic Notch overlay, and screen-aware AI assistant for macOS & Windows.

Version: v0.3.2 GitHub Stars Release: Download License: MIT Platform: macOS | Windows Tauri v2 Whisper.cpp


⭐ If you love what we're building, please consider starring this repository — it means the world to us and helps more developers discover MurMur! ⭐


MurMur Dynamic Notch Demo Preview

Note

💬 A Note from the Creator — Active Beta & Early MVP Stage

Hey there! 👋 MurMur is currently in active Public Beta (MVP). We are building in the open and shipping rapid refinements, squashing bugs, and continuously tuning performance every day. If you encounter any rough edges or have feature suggestions, please bear with us — we are working relentlessly to craft the ultimate ambient voice AI operating system for you.

Found a bug or have an idea? Please open an Issue or join the discussion — we'd love to hear from you!


💡 What Makes MurMur Unique (The Open-Source Wispr Flow + Otter.ai Alternative)

Tired of expensive $15–$20/month subscriptions, cloud audio logging, and heavy background apps that hog your CPU and RAM?

MurMur is built from the ground up as a 100% free, forever open-source, and hardware-accelerated alternative combining the lightning-fast dictation of Wispr Flow and Superwhisper with the ambient intelligence of Otter.ai.

Feature 🎙️ MurMur ☁️ Wispr Flow 🦦 Otter.ai 🏷️ Superwhisper 🍎 MacWhisper Pro
Pricing 100% Free & Open-Source $15 / month $10–$20 / month $8.99 / mo or $199 €29 – €49 (Pro)
Audio Privacy 100% Local (Zero data leaves device) Sent to Cloud Sent to Cloud Hybrid / Local Local
Inference Support Hybrid: 100% Local + Free Cloud (Groq, Gemini, Deepgram) Cloud Only (Proprietary) Cloud Only Local + Paid Credits Local Only (Cloud Pro extra)
Disk Footprint ~150 MB (Base model) 500 MB+ Web / Mobile 1.2 GB+ 1.5 GB+
RAM Usage ~35 MB Idle (~120MB Peak) ~250 MB+ ~300 MB+ ~400 MB+ ~500 MB+
Universal Auto-Paste Instant (Zero popups) Yes ❌ (Manual Copy) Yes Manual / Dictation
Dynamic Island & Notch UI Yes (Floating Pill + AI Wave) ❌ None ❌ None ❌ None ❌ None
VoxCoder Mode Yes (Spoken Code $\rightarrow$ Identifiers) ❌ None ❌ None ❌ None ❌ None
Auto Note-Taking & Tasks 🛠️ Coming Soon ❌ None ✅ Yes ❌ None ❌ None
Screen-Aware AI Assistant 🛠️ Coming Soon ❌ None ❌ None ❌ None ❌ None
Platform Support macOS & Windows macOS only Web / Mobile macOS only macOS only

🚀 Why Creators & Developers Choose MurMur:

  • 💸 100% Free Forever: No subscriptions, no hidden token limits, no paywalls, and no credit card required.
  • 🌐 Hybrid Local + Free Cloud Freedom: Choose between 100% offline private Whisper models on your hardware (CPU/GPU) or plug in free API keys for ultra-fast cloud inference (Google Gemini 2.0 Flash, Groq Whisper LPU, or Deepgram Nova-2).
  • 🪶 Ultra-Lightweight (~150 MB Disk & ~35 MB Idle RAM): Unlike heavy Electron or Python apps, MurMur is compiled natively with Rust & Tauri v2, consuming negligible system memory so your computer stays blazing fast.
  • ⚡ Seamless "Type Anywhere" Dictation: Press your shortcut (Option+Space / customizable), speak naturally at 150+ words per minute, and release. MurMur instantly types your words directly into Cursor, VS Code, Slack, Notion, Claude, or ChatGPT.
  • 🏝️ Dynamic Island & Fluid Wave: Minimal floating pill that expands dynamically when you speak and tucks away automatically when you're done.
  • 💻 VoxCoder Mode: Formats raw speech into clean code identifiers (camelCase, snake_case, punctuation, brackets, syntax).
  • 🤖 Screen AI & Notes (Coming Soon): Multi-monitor screen context reasoning and natural voice note taking in active development.

🌟 Overview

MurMur is the ultimate ambient voice intelligence and AI prompting assistant designed for developers, writers, and power users. Instead of typing out massive prompts for ChatGPT, Claude, or Cursor, simply hold your hotkey, speak naturally, and let MurMur transcribe, format, and auto-paste text directly into your active window.

With v0.3.0, MurMur introduces the Dynamic Island with smooth spring animations, a 60 FPS CoreAudio engine, glowing sinusoidal AI Wave, and customizable activation modes.


✨ Feature Breakdown & Status

Feature Status Description
100% Local Whisper Dictation ✅ Live Zero-latency, private on-device speech transcription via whisper.cpp.
Hybrid Local & Free Cloud Inference ✅ Live Switch between local Whisper models and free-tier cloud APIs (Groq, Gemini, Deepgram).
Dynamic Island & Notch Overlay ✅ Live Interactive floating pill with spring physics and auto-hidden activation.
Fluid AI Wave Visualizer ✅ Live Apple Intelligence glowing sinusoidal wave driven by real-time audio levels.
VoxCoder Mode ✅ Live Formats spoken programming syntax into camelCase, snake_case, and symbols.
Universal Auto-Paste ✅ Live Automatically types transcribed text directly into any active application.
Multilingual Whisper Catalog ✅ Live 99-language support with one-click atomic downloads.
Auto Note-Taking & Task Router 🛠️ Coming Soon Voice triggers ("Take a note...", "Add task...") routed to local workspace tabs.
Screen-Aware Vision Assistant 🛠️ Coming Soon Multi-monitor screen capture analyzed via Google Gemini 2.0 Flash / local Gemma.

📥 Download & Installation

Download the latest pre-compiled installer for your operating system:

👉 Download MurMur from GitHub Releases

  • macOS (Apple Silicon — M1/M2/M3/M4): Download Murmur_0.3.0_aarch64.dmg or Murmur_aarch64.app.tar.gz
  • macOS (Intel — x86_64): Download Murmur_0.3.0_x64.dmg
  • Windows (64-bit): Download Murmur_0.3.0_x64-setup.exe or .msi installer

💻 Minimum System Requirements:

Platform Minimum OS Version Recommended Architecture
macOS (Apple Silicon) macOS 11.0 (Big Sur) macOS 14 (Sonoma) / 15 (Sequoia) Apple Silicon (aarch64)
macOS (Intel) macOS 10.15 (Catalina) macOS 12 (Monterey) / 13 (Ventura) Intel 64-bit (x86_64)
Windows Windows 10 (64-bit, 1809+) Windows 11 (64-bit) 64-bit (x64)
  • Note for macOS: Allow Microphone and Accessibility permissions on first launch.

🛠️ Usage

  1. Launch MurMur. You'll see the 🎙️ bird icon appear in your macOS menu bar / system tray.
  2. Click the icon and select MurMur Dashboard to configure your model, hotkey, and preferences.
  3. Anywhere on your computer, press Option+Space (or your customized hotkey).
  4. The Dynamic Island will appear. Speak your prompt or code naturally.
  5. Stop speaking or press the shortcut again. MurMur instantly pastes the text into your active window!

🏗️ For Developers: Build from Source

If you want to build or hack on MurMur yourself:

  1. Clone the repository:
    git clone https://github.com/Mr-ABX/MurMur.git
    cd MurMur
  2. Install dependencies:
    npm install
  3. Run the development server:
    npm run tauri dev
  4. Build the production release:
    npm run tauri build

MurMur Stack:

  • Frontend: React 18, TypeScript, TailwindCSS, Framer Motion, Vite
  • Backend / Desktop: Rust, Tauri v2, Objective-C / Cocoa bridge
  • AI Engine: whisper.cpp (via whisper-rs)
  • Audio Capture: cpal with real-time 60 FPS CoreAudio streaming

🤝 Contributing

We welcome contributions from developers, designers, and AI enthusiasts of all skill levels! Here is how you can get involved:

How to Contribute

  1. Fork the Repository on GitHub.
  2. Create a Feature Branch:
    git checkout -b feature/amazing-new-feature
  3. Make your changes and verify tests & lints:
    npm run test          # Run frontend tests
    cargo test            # Run Rust unit tests
    cargo clippy          # Check Rust code quality
  4. Commit your changes:
    git commit -m "feat: add amazing new feature"
  5. Push to your branch:
    git push origin feature/amazing-new-feature
  6. Open a Pull Request describing your changes.

💬 Reporting Bugs & Feature Requests

  • Found a bug or have an idea? Please open an Issue with reproduction steps or details.
  • Join discussions and share feedback to help shape upcoming features!

📄 License

This project is MIT licensed.

About

The 100% Free & Open-Source Wispr Flow + Otter.ai Alternative. Local Whisper Voice Dictation, Dynamic Island & Notch UI, Screen AI Assistant & Notes for macOS & Windows.

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