Phone calls
A spoofed caller ID and a cloned voice will get past most people. They will not get past a matching codeword.
Live since April 2026
AI can clone anyone. Hongi proves who is real.
Two people, one app, codewords only the two of you can see. On any phone call, video, or in-person conversation, you know in five seconds whether it is really them.
Free. No account. Works offline.
- $25.6Mgone in one deepfake video callArup · Hong Kong 2024
- €40MBelgian phishing and vishing lossesFebelfin · 2024
- 3 secof audio is enough to clone a voiceindustry baseline 2026
You say papaya, they confirm. They say saturn, you confirm. Both words match → it is really them.
Scan with your phone
or visit hongi.io/get
Silent verification
For the calls where asking
out loud would give it away.
Sometimes the caller is the wrong person and saying "what is your codeword" would tip them off. Hongi has a second mode: silent ping. One tap. Your real contact gets a push notification. They answer yes or no. The caller hears nothing and sees nothing.
- Works on any call, on any network
- The caller never sees your screen
- One tap. One notification. One yes or no.
How it works
Four steps. Pair once in person or remotely, then verify on any channel.
- 1or
Pair up
Scan a QR code in person, or send a one-time invite link if the other person is not in the room.
- 2YOU SAY horizon THEY SAY compass
See your codeword
Each side gets a different codeword. Both rotate every 30 seconds, derived from a key only the two of you share.
- 3
Read it aloud
On the call, video, or in person, you read your word. They read theirs. Same to ten seconds.
- 4
Both match = verified
Two matching codewords means it is them. An impostor would have to know both sides at once. They cannot.
QR or invite link Scan in person, or send a one-time link when you are apart. Both paths derive the same key.
Dual codewords Each side sees a different word. A match on one side is meaningless. A match on both is the proof.
End-to-end by design X25519 key exchange between the two devices. The server forwards a cipher it cannot read.
Silent ping When you cannot ask for a codeword aloud, tap one button. Your real contact gets a push notification and confirms or denies. The caller hears nothing.
Use it anywhere
Any channel, any situation where it matters that the person on the other end is the one you think.
Video calls
Faces can be deepfaked in real time now. Codewords cannot. Read yours before you share anything sensitive.
In person
For people you have not seen in a while, or someone you only know online showing up for the first time.
Chat and messaging
An unusual request from a known contact is the moment to verify, not after the transfer.
When something feels off
Tap the silent ping. Your real contact gets a push notification and answers yes or no. The caller hears nothing.
Codewords in your language
Wordlists are curated per language so the codeword you hear on the call is a word you actually use.
- English
- Nederlands
- Français
- Deutsch
- Türkçe
- Español
- Italiano
- Português
- Polski
- العربية
- हिन्दी
- Bahasa Indonesia
- 日本語
- 한국어
- 中文
Start verifying.
It is free.
iOS and Android. No account, no sign-up, no waiting list. Install, pair, verify.
Scan to download
Keep Hongi free
Hongi is free and stays free. If it has helped you avoid a bad call or just gave you peace of mind, a tip keeps the lights on.