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PrivateMark — Startup Profile
Startup

PrivateMark

Catch the leaker. And hide photos in plain sight.

Security & Privacy

Astracia Signal Score

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Not enough public signals for a score yet. Missing signals are not a sign of weakness.

About the startup

PrivateMark does two things, on-device, no servers, no accounts. 1) Trace any leak. Before you share a photo, PDF, Word or PowerPoint, it weaves in an invisible, per-recipient watermark. If a copy leaks, feed it back and it names whose copy it was. 2) Hidden Photo. Send a picture everyone sees as an innocent cover; your trusted contact opens it in PrivateMark to reveal the real photo, sealed with AES-256.

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