Rota AI: Free Open Source Voice Dictation for Windows, Mac & Linux
Why Voice Dictation Matters
Typing is slow. The average person types at 40 words per minute but speaks at 150 words per minute. That gap (110 words per minute of lost productivity) is what voice dictation closes.
But most voice dictation tools have a problem: they are expensive, require subscriptions, or lock you into proprietary ecosystems. Wispr Flow costs $15 per month. SuperWhisper costs $8.49 per month. Both are great products, but not everyone can justify another monthly subscription.
Rota AI changes that. It is the first truly free, open source voice dictation tool that rivals the commercial alternatives. MIT licensed. No account. No subscription. No data lock-in.
What Is Rota AI?
Rota AI is a desktop application that lets you dictate text into any application using your voice. Press a hotkey, speak naturally, release. Your text appears exactly where your cursor is, cleaned and formatted by AI.
It works on Windows 10/11, macOS 13+, and Linux (Ubuntu, Fedora, Arch). It runs in the system tray and is always a single keypress away.
The Pipeline
The transcription pipeline has seven stages, each running on its own thread so the UI never freezes:
- Audio capture — 16kHz mono PCM via PortAudio, with real-time waveform visualization
- Voice activity detection — Silero VAD strips silence before transcription, saving API credits and improving accuracy
- Transcription — Your choice of Groq Whisper (free tier), Gemini (free tier), or local Ollama (100% offline)
- AI cleanup — An LLM removes filler words, fixes grammar, resolves self-corrections, and formats output
- Context detection — Reads the active window to detect whether you are in email, chat, code, or notes
- Text injection — Multiple fallback methods ensure text lands in even the most stubborn applications
- Persistence — Session history, snippets, dictionary, and analytics stored in local SQLite
How It Compares to Paid Alternatives
| Feature | Wispr Flow ($15/mo) | SuperWhisper ($8.49/mo) | Rota AI (Free) |
|---|---|---|---|
| AI cleanup | Yes | Yes, multiple modes | Yes |
| Offline mode | No | Yes | Yes |
| Open source | No | No | Yes, MIT |
| Account required | Yes | Yes | No |
| Context awareness | Yes | Reads screen | Detects app |
| Telemetry | Cloud based | Not fully disclosed | None |
Why Open Source Matters for Voice Dictation
Voice dictation tools process your speech. That is inherently sensitive data. With closed-source tools, you have to trust that the company handles your data responsibly. You cannot verify it. You cannot audit it.
Rota AI is different. Every line of code is on GitHub. You can verify exactly what it does with your voice data. The answer: nothing except what you explicitly configure. Audio goes to the transcription service you choose (Groq, Gemini, or local Ollama) and nowhere else.
The desktop app has zero telemetry. No analytics. No phone-home. No tracking. This is not a feature they will add later. It is a deliberate design principle baked into the architecture.
Getting Started in 60 Seconds
- Download the latest release for your OS from the website or GitHub releases
- Install — run the installer on Windows, unzip on Mac, or mark the AppImage as executable on Linux
- Choose a backend — pick Groq (free tier), get an API key from console.groq.com, or install Ollama for offline use
- Start dictating — press F9 in any app, speak, release. Your text appears
That is it. No account creation. No credit card. No configuration beyond picking your preferred transcription backend.
Use Cases
Developers — Dictate code comments, commit messages, documentation, and Slack updates without breaking flow. Rota detects VS Code and preserves camelCase and technical vocabulary.
Writers — Draft emails, articles, and documents at the speed of speech. The AI cleanup pass removes filler words and fixes grammar automatically.
Students — Take notes, write essays, and draft emails hands-free. Perfect for long study sessions where typing causes fatigue.
Accessibility — For users with RSI, carpal tunnel, or other conditions that make typing painful, Rota AI provides a completely free way to interact with computers using voice.
The Future
Rota AI is actively developed. The roadmap includes screen context reading, file transcription, cross-device sync, and mobile support. But the core product (voice dictation that works, is free, and respects your privacy) is already production-ready today.
Star the project on GitHub, share it with someone who needs it, and help build the future of open source voice dictation.