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One to One Secret Chat
An end-to-end encrypted chat for exactly two people
A messenger that only holds one conversation. Pair with one person via an invite link; messages, photos and calls are encrypted on your phone and the server only stores ciphertext. No contact list, no groups, no ads. iOS, 25 languages.
Hi Product Hunt 👋
I'm a solo developer in Germany. One to One Secret Chat started from a simple frustration: every "secure messenger" wants to be a social network. I wanted the opposite — the smallest possible app for the one conversation you actually want to keep private.
So it holds exactly one chat. You send one invite link to your partner, parent or friend, they tap it, and you're paired. That's the entire onboarding.
Under the hood:
🔑 Curve25519 key pair per device, private key in the iOS Keychain
🔒 ECDH + HKDF → AES-GCM for every message and file — the server only ever sees ciphertext
📞 Voice and video are peer-to-peer WebRTC (DTLS-SRTP); media never touches a server
🛡️ Safety-code verification so you can confirm nobody is in the middle
🚫 No analytics SDK, no trackers, no ads
I also put "what we can see" right on the website — which two accounts are paired, message timestamps, call start/end — because I'd rather say it than have you guess.
What's next: key rotation for forward secrecy, a TURN relay for strict networks, and whatever you tell me is missing.
Text chat is free forever; outgoing calls are a subscription with a free first month.
Thanks for looking — questions welcome!
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About One to One Secret Chat on Product Hunt
“An end-to-end encrypted chat for exactly two people”
One to One Secret Chat was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #409 on the daily leaderboard. A messenger that only holds one conversation. Pair with one person via an invite link; messages, photos and calls are encrypted on your phone and the server only stores ciphertext. No contact list, no groups, no ads. iOS, 25 languages.
One to One Secret Chat was featured in iOS (111k followers), Messaging (52k followers) and Privacy (11.4k followers) on Product Hunt. Together, these topics include over 65.6k products, making this a competitive space to launch in.
Who hunted One to One Secret Chat?
One to One Secret Chat was hunted by Chenghao Li. 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.
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Chenghao Li