What is Rusper?
Rusper is an ultra-fast, zero-subscription desktop voice dictation companion for Windows. Press Insert anywhere in any application, speak naturally at 200+ WPM, and watch your thoughts convert into clean text in sub-300ms.
Low Latency
Powered by Groq LPUs running Whisper Large v3 Turbo at ~216x real-time speed for instantaneous voice-to-text conversion.
Low RAM footprint
Engineered in native Rust and Tauri v2. Consumes a fraction of the system resources required by Electron applications.
BYOK
Connect your free Groq API key. Zero monthly subscriptions, zero token markups, and zero intermediate logging servers.
How does it work?
Three simple phases from spoken thought to formatted text inside your active application.
Press Insert
Tap the Insert key in any active application or text field. Rusper instantly locks your foreground window focus and activates audio capture with zero latency.
Speak
Speak your thoughts naturally at 200+ WPM. Audio streams over direct encrypted HTTPS to Groq LPUs executing Whisper Large v3 Turbo in sub-300ms.
Get Clear-Cut Output
Rusper refines syntax for your target window—formatting code, shell commands, or polished text—and injects it cleanly into your caret with 1-key undo support.
See Rusper in action
Watch real-time voice dictation, smart contextual prompt expansion, and instant in-place code editing.
Why Rusper?
Engineered for speed, total privacy, and seamless desktop integration. Rusper gives you direct, uncompromised voice dictation with zero monthly fees and zero bloat.
| Feature / Capability | 🎙️ Rusper | Architecture & Details |
|---|---|---|
| Pricing Model | 100% Free Forever (BYOK) | Bring your own API key with zero subscriptions, paywalls, or token markups. |
| Cloud Latency | < 300ms End-to-End | Near-instant speech-to-text powered by Groq LPUs at ~216x real-time speed. |
| System Footprint | ~25 MB RAM | Native Rust and Tauri v2 desktop core with zero Electron overhead. |
| Speech Recognition | Whisper Large v3 Turbo | State-of-the-art multilingual acoustic model for unmatched transcription accuracy. |
| Privacy & Telemetry | Zero Telemetry (Direct HTTPS) | Encrypted HTTPS direct to your private Groq account with no intermediate logging servers. |
| Voice Smart Editing | In-Place Text Transformation | Highlight text anywhere and speak to rewrite, condense, translate, or format. |
| Window Integration | Active Focus Restore | Captures foreground HWND, restores focus, and injects text cleanly into the caret. |
| Prompt Personas | Contextual LLM Formatting | Developer syntax, tone adjustment, email polish, and spoken prompt expansion. |