Lost your keys? A stranger returns them anonymously.
One tap on your FoundSOS keychain notifies you instantly — by push and email. Your address and phone number stay 100% private.
Keys go missing. People want to help.
Most keys aren't stolen — they're dropped, left on a counter, forgotten in a coat pocket. Someone always finds them. They just don't have a way to reach you.
Dropped on the street
A passer-by taps the keychain with their phone. You get a push notification with the exact map location before you even realize your keys are missing.
Left in a café or gym
Staff scan the tag. An anonymous chat opens instantly — they can tell you where to pick them up without knowing who you are.
Kids or elderly parents
If a keychain is found in the wrong place, the finder can call your emergency contact — never the person carrying the keys.
The finder never sees your name, your address, or your phone. Just a way to reach you — and to walk away safely.
Three steps. Sixty seconds.
You activate once. From that moment on, every scan is an anonymous, private conversation between you and the finder.
Stick it or attach it
Peel-and-stick, or clip on. No batteries, no wiring. Every tag is unique and preloaded — you just claim it.
Someone taps
Any NFC-capable phone opens your contact page instantly. The finder needs no account, no app, no sign-up.
You're notified
Instant push + email with the scan location. Reply through anonymous chat. Your name and number are never shown.
You decide what they see. Always.
FoundSOS is built as a safety layer, not a broadcast channel. Every setting below is yours to toggle at any time.
Anonymous chat
Talk without revealing your number. Ever. Chats live on the encrypted FoundSOS relay, never on your phone bill.
You choose the channels
Show chat only, or add phone, WhatsApp, or a contact form. Your call, per tag.
Instant push + email alerts
Know the moment someone taps your tag or sends a message. No missed scans, no delays.
6-hour secure sessions
A scan opens a 6-hour contact window, then expires. No permanent link between you and the finder.
Block anytime
One switch disables chat if someone misuses it. Silence, instantly. You keep the tag and the notifications.
Optional live location
The finder can share a live map pin — useful if a bike, car or bag has been moved. Optional, revocable, never automatic.
FoundSOS Keychain
- ChipNTAG215 · 504B
- Dimensions38 × 28 × 3 mm
- MaterialAnodized aluminum + steel ring
- Water resistanceIP67
- CompatibilityiOS 14+ · Android 8+
- Warranty2 years
Free EU shipping over €20 · 30-day money-back
Real returns, quietly.
Left my keys on a bus seat. The driver tapped the ring at the depot. I had them back the same evening.
MM · MunichI had lost my keys three times last year. Since I got the FoundSOS keychain — not once wasted.
AA · AmsterdamThe chat is genius. No phone number exchanged, no awkwardness. Just: 'Reception, ground floor.'
SS · SofiaEverything you'd want to know.
- No. Any NFC-capable phone taps the tag and a web page opens instantly. No download, no login.