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).
Effort used to be a signal. A thoughtful cold email or thank-you note showed that someone had invested real time. Today, AI can write polished emails in seconds, making genuine effort impossible to see. HumanStamp makes effort visible again. It's a Chrome extension that verifies how an email was written—without the content ever leaving your device. If you personally type over 50% of a message, you can add a HumanStamp badge. Recipients with the extension can hover over the badge to verify it.
Hi Product Hunt!
I'm excited to share HumanStamp.
AI has made great writing accessible to everyone, but it's also made effort invisible. A thoughtful cold email or thank-you note used to signal that someone invested real time. Today, it's impossible to tell.
HumanStamp is our attempt to bring that signal back. It's a Chrome extension that verifies how an email was written—not what it says. Everything happens locally on your device, so your email content never leaves your computer. If you personally type more than 50% of a message, you can add a HumanStamp badge before sending.
A few questions we'd love your thoughts on:
Would a human verification badge change how you read cold emails?
Where else would you want to see this kind of trust signal?
What's the biggest concern you'd have about a product like this?
We would love any feedback. Thank you for checking us out!
the biggest concern for me: it verifies typing effort, not original thought. nothing stops someone from having ai draft the email, reading it, then manually retyping the whole thing themselves. that clears 50% typed easily and gets the badge, but the "effort" it's supposed to signal never actually happened. feels like it measures keystrokes when what people actually care about is whether the ideas are yours
Love that everything stays local, feels like the badge actually means something instead of just trusting a sender's word. Curious to see how it holds up with heavy editing and pasted text.
About HumanStamp on Product Hunt
“Make effort visible in the age of AI”
HumanStamp was submitted on Product Hunt and earned 11 upvotes and 7 comments, placing #109 on the daily leaderboard. Effort used to be a signal. A thoughtful cold email or thank-you note showed that someone had invested real time. Today, AI can write polished emails in seconds, making genuine effort impossible to see. HumanStamp makes effort visible again. It's a Chrome extension that verifies how an email was written—without the content ever leaving your device. If you personally type over 50% of a message, you can add a HumanStamp badge. Recipients with the extension can hover over the badge to verify it.
HumanStamp was featured in Chrome Extensions (52.7k followers), Email (36.7k followers), Artificial Intelligence (473.1k followers) and Tech (627.5k followers) on Product Hunt. Together, these topics include over 291.7k products, making this a competitive space to launch in.
Who hunted HumanStamp?
HumanStamp was hunted by Sumedha Kethini. 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 HumanStamp stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Sumedha Kethini