Active presence protection
whenever you step away.
Sentinel continuously verifies your presence in real-time using on-device camera AI. Automatically locks your Mac when you leave your desk with customizable timers, and shields your screen from prying eyes in bustling cafes and open-plan offices.
Tailored protection for how you actually work.
From bustling neighborhood cafes to shared corporate floors, Sentinel keeps confidential work confidential.
Bustling Cafes & Transit
Working on sensitive roadmaps, proprietary code, or financial sheets in a coffee shop or airport? Sentinel instantly blurs the screen the moment someone peers over your shoulder, preventing visual snooping.
→ Anti-Shoulder-Surfing DefenseOpen-Plan Offices & Shared Spaces
Stepping away to grab a coffee, answer a call, or head into a meeting? Never leave your Mac exposed. Sentinel automatically locks your workstation when you step away, removing the risk of exposed customer records or internal chat channels.
→ Configurable Departure LockSecurity Leads & Executives
Meet strict data protection and NDA requirements without frustrating manual lock habits. 100% air-gapped processing executes directly on Apple's Neural Engine with zero cloud streaming or third-party telemetry.
→ Air-Gapped Zero-Trust ArchitectureReal-time protection.
Zero false lockouts.
Built natively for macOS with Apple Neural Engine acceleration, customizable grace periods, and configurable security thresholds.
Locks when you step away. Never leave your Mac exposed.
Step away for a coffee, a quick chat, or a phone call. Sentinel continuously verifies your presence on-device, automatically locking your screen according to your customized timer settings.
Face-Aware Presence Verification — Utilizes Apple Vision framework directly on your Mac's Neural Engine for seamless, reliable presence verification.
Zero Network Latency — 100% on-device processing in volatile RAM. No cloud delays, no external dependencies.
Detects prying eyes before they see sensitive information.
Working on confidential code or client data in a crowded cafe, airport lounge, or open office? Sentinel instantly detects secondary gazes over your shoulder, deploying an intelligent privacy blur.
Instant Privacy Shield — Screen content automatically blurs the instant an observer leans into view.
One-Click Override — Easily click "Allow Co-View" when collaborating with a trusted colleague.
Your music pauses when you leave. Resumes when you're back.
Sentinel blends seamlessly into your day — automatically pausing Apple Music and Spotify when you step away, and resuming playback the moment you return.
Smart Media Sync — Native integration with Apple Music and Spotify via local AppleScript events.
Intelligent Grace Periods — Configurable thresholds prevent false triggers during natural head turns, calls, or reading.
Observer Audit Log
Local threat log records unauthorized access attempts with encrypted snapshots and quick-training tools.
Ambient Light Adaptive
Automatically calibrates matching thresholds in dimly-lit coffee shops or bright outdoor settings.
Smart Battery Mode
Intelligently conserves power on battery — continuous presence security without battery drain.
Configurable Lock Timers
Set your departure lock window from quick auto-lock buffers to extended comfort periods to match your exact workflow.
What happens on your Mac, stays on your Mac.
Sentinel was engineered from the ground up around strict local data sovereignty. Biometric vectors and camera streams never leave your device.
Volatile RAM Processing
All frame acquisition and facial matching occur strictly in temporary RAM and are instantly flushed and overwritten.
Zero Cloud Transmission
Sentinel declares zero network entitlements. Raw video feeds, landmarks, and face profiles are never uploaded to any server.
Keychain Hardware Encryption
Mathematical landmark signatures are protected inside your local macOS Keychain with Apple Secure Enclave hardware encryption.
Need assistance or custom enterprise deployment?
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