Voice at your cursor.
Ambient AI in your flow.
A quiet ambient intelligence layer underneath macOS. Transcribe on-device with Apple Silicon MLX, or let Cloud AI turn raw thoughts into context-perfect writing anywhere you type.
How Tacit Pro Operates
Spoken Voice or Selection
Hold ⌥ Option to speak, or highlight text anywhere and trigger your micro-hotkey.
Active App Awareness
Senses target application context (Xcode, Slack, Mail, Linear) via native macOS Accessibility APIs.
Cloud Reasoning Engine
High-speed Cloud AI eliminates filler words, formats syntax, and tailors output tone to the recipient.
Injected at Cursor
Formatted prose or idiomatic code lands directly in your active input field in sub-second response time.
Clean, Focused System Preferences
Hosted high-speed intelligence layer (Included in Pro)
Apple Silicon MLX Qwen Engine (Zero audio leaves device)
Automatically adjust tone in Slack, Xcode, Mail, Linear
Recognize camelCase, code identifiers, company names
Hold ⌥ for Voice · ⌥ + Enter for In-Place AI Polish
Remember English/Chinese layout per application
Auto-switch to English on "/" in Ghostty, iTerm, and Terminal
Remap Right ⌘ to ⌃⌥⇧⌘ (Hyper) & Right ⌥ to ⌃⌥⇧ (Meh)
Eliminate macOS default input delay on short taps
Local SQLite encrypted storage for snippets and images
Keyboard-driven search & paste palette
Auto-exclude 1Password, Bitwarden, and Apple Keychain items
Instantly paste selected history item without clipboard pollution
TACIT-PRO-COMMERCIAL · 1 Seat (macOS)
High-priority enterprise inference queue
Provide your own API endpoints if preferred
Accessibility & Microphone trust status
Built for the Flow of Power Users
Voice & AI Agent
The core engine of Tacit Pro. Combines instant on-device MLX speech recognition with cloud-scale AI reasoning. Write emails, docs, and code comments at the speed of thought.
Smart Typing Foundation
Eliminate input-source friction. Tacit automatically switches between English and regional layouts per app, changes to English on terminal /, and creates Hyperkeys.
Native Clipboard Hub
A lightweight, privacy-first clipboard history for text, code, and images. Instantly searchable from the keyboard, with automatic exclusion of password manager secrets.
Voiceprint Protection & Biometric Anti-Harvesting
Conventional web dictation and cloud recorders transmit your raw acoustic frequencies across the internet, where your unique biometric voiceprint can be captured, profiled, or used for AI voice synthesis. Tacit neutralizes this risk by processing acoustic waveforms strictly on-device via Apple Silicon MLX. Audio buffers are destroyed from volatile RAM the millisecond text is generated. Third-party websites, trackers, and data brokers can never scrape or harvest your vocal identity.
Compare Capabilities
| Feature | Starter (Free) | Tacit Pro |
|---|---|---|
| On-Device MLX Speech-to-Text (Apple Silicon) | ✓ | ✓ |
| Voiceprint Anti-Harvesting & Biometric Shield | ✓ | ✓ |
| Cloud AI Reasoning & Context Rewrite | BYOK Only | Unlimited Included |
| Active App Sensing (Xcode, Slack, Mail, Linear) | — | ✓ |
| Custom Developer Jargon & Vocabulary Sync | Up to 5 terms | Unlimited |
| Smart Typing & App Input Source Switching | ✓ | ✓ |
| Native Clipboard History Hub | ✓ | ✓ |
| License Coverage | Personal Use (Unlimited) | 1 User / 2 Personal Macs |
| Support & Updates | Community | Priority Email Support |
Designed for Serious Mac Workflows
“Tacit completely replaced typing for my daily Slack updates, PR comments, and spec docs. The active app context understanding is what makes it irreplaceable.”
“Most voice typing apps are slow Electron shells. Tacit runs natively in the background at zero idle CPU and formats spoken thoughts into polished prose instantly.”
“The hybrid model is brilliant: offline MLX when I'm on a flight, and full Cloud AI reasoning when I need executive emails drafted at my desk.”
Simple plans. Immediate return on time.
Starter
For users who want offline voice typing or bring their own API key.
- Local MLX ASR on Apple Silicon
- 100% Offline voice-to-text
- Smart typing & per-app input switching
- Native clipboard history
- Bring Your Own Cloud API Key (BYOK)
- Included Cloud AI Quota
Tacit Pro
Full cloud power. Context-aware AI rewrite and zero API setup required.
- Unlimited Cloud AI Intelligence
- Context-Aware Rewrite (Xcode, Slack, Mail, Linear)
- High-speed cloud ASR + Local MLX fallback
- 1 User / Up to 2 Personal Macs (e.g. Laptop + Desktop)
- Custom technical jargon & vocabulary sync
- Priority updates & technical support
Frequently Asked Questions
How does Tacit prevent other services from harvesting my voiceprint?
When you dictate on websites or using browser-based cloud tools, your raw acoustic audio can be intercepted, stored, and analyzed into a permanent biometric "voiceprint" capable of cross-site profiling and unauthorized AI voice cloning. Tacit bypasses web browsers entirely. Audio is captured exclusively at the macOS system layer, transcribed inside your Mac's Neural Engine via Apple Silicon MLX, and wiped immediately from volatile RAM. Your biometric acoustic signature is never uploaded, recorded, or exposed to third-party data harvesters.
Why is Tacit only designed for macOS?
Tacit is built directly against native macOS frameworks (Accessibility APIs, Apple Silicon Neural Engine via MLX, and CoreAudio). We refuse to compromise performance, memory, or battery life with cross-platform Electron containers.
How does the hybrid model protect privacy?
In local mode, speech-to-text runs entirely on your Mac via Apple Silicon MLX; audio data never touches any server. In Pro Cloud mode, audio and text are processed in transit via enterprise-grade Cloud AI APIs with zero retention for model training.
What payment methods are supported?
We accept all major credit and debit cards (Visa, Mastercard, American Express), Apple Pay, and PayPal. All payments are processed through certified, PCI-compliant payment gateways.
How do I activate the Pro license after purchase?
Immediately upon checkout, your license key appears on screen and is delivered to your email. Open Tacit on your Mac, navigate to Preferences → Account & License, and paste your key.
How many Macs can I use with my Pro license?
Each Tacit Pro subscription covers 1 user across up to 2 personal Macs simultaneously (for example, your MacBook and your desktop Mac mini or Mac Studio). If you migrate to a new computer, you can easily deactivate and transfer your license key with one click in settings.