This product was not featured by Product Hunt yet. It will not be visible on their landing page and won't be ranked (cannot win product of the day regardless of upvotes).
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.
I spent 8 years at ExpressVPN, and the whole time one thing bugged me: we could protect a file perfectly... right up until you hit "send." After that it's out of your hands and you are just trusting the person on the other end not to screenshot it, forward it, or leak it. And there was no private way to answer the obvious question: "okay, but who leaked this?" Every tool was a server, an account, or an ugly visible stamp.
So I built PrivateMark. It slips an invisible, per-recipient mark into each copy you share, and if one ever shows up where it shouldn't, you drop it back into the app and it tells you exactly whose copy it was. The part that nearly broke me was documents: there's no on-device way to render Office files, so I ended up writing PDF and Word/PowerPoint parsers from scratch in Swift, just so the mark survives being forwarded and re-exported.
Somewhere along the way I got carried away and added Hidden Photo, a real picture tucked inside an innocent-looking cover that only someone you've paired with in person can open. All of it runs on your device. No server ever sees your files. Not even me.
I have tried hard to be honest about what it does and doesn't do. There's a Security section in the app that spells out the limits plainly, because I'd rather under-promise. I would genuinely love your feedback, and I'll be here all day for the hard questions.
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About PrivateMark on Product Hunt
“Catch the leaker. And hide photos in plain sight.”
PrivateMark was submitted on Product Hunt and earned 11 upvotes and 1 comments, placing #27 on the daily leaderboard. 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.
PrivateMark was featured in Productivity (658.1k followers), Privacy (11.3k followers) and Security (2.8k followers) on Product Hunt. Together, these topics include over 166.1k products, making this a competitive space to launch in.
Who hunted PrivateMark?
PrivateMark was hunted by Jose Blaya. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how PrivateMark stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Jose Blaya
Maker here 👋 I'm Jose.
I spent 8 years at ExpressVPN, and the whole time one thing bugged me: we could protect a file perfectly... right up until you hit "send." After that it's out of your hands and you are just trusting the person on the other end not to screenshot it, forward it, or leak it. And there was no private way to answer the obvious question: "okay, but who leaked this?" Every tool was a server, an account, or an ugly visible stamp.
So I built PrivateMark. It slips an invisible, per-recipient mark into each copy you share, and if one ever shows up where it shouldn't, you drop it back into the app and it tells you exactly whose copy it was. The part that nearly broke me was documents: there's no on-device way to render Office files, so I ended up writing PDF and Word/PowerPoint parsers from scratch in Swift, just so the mark survives being forwarded and re-exported.
Somewhere along the way I got carried away and added Hidden Photo, a real picture tucked inside an innocent-looking cover that only someone you've paired with in person can open. All of it runs on your device. No server ever sees your files. Not even me.
I have tried hard to be honest about what it does and doesn't do. There's a Security section in the app that spells out the limits plainly, because I'd rather under-promise. I would genuinely love your feedback, and I'll be here all day for the hard questions.
Investigating leaks is always free. For launch I created a 1-month free promo code for Appstore https://apps.apple.com/redeem?ctx=offercodes&id=6794625058&code=PRODUCTHUNT and a Lifetime offer of $19.99 (normally $29.99) 👉 https://privatemark.app/producthunt
Thank you!