Contact information


Before sending us an e-mail, please read our privacy policy (the “Proton Technologies AG” section). If you agree with it, send your e-mail to:

Encrypted e-mail

We prefer GnuPG-encrypted e-mails. You can download our public GPG key from our web server or from the Keybase mirror:

  • curl | gpg --import (direct download)
  • curl | gpg --import (Keybase mirror)

Our current fingerprint is:

valid fromvalid toFingerprint/Key ID
2019-05-262019-08-24FE38 23F5 7A02 600E F080 9E58 BCF4 BFD9 4ABF F017

You don’t need to sign your e-mails, so you don’t have to create a GPG key to communicate with us. If you want to get encrypted replies, please provide your public GPG key or fingerprint. Have a look at our short guide to create a modern Curve25519 key.

Expired and revoked GPG keys (click to extend)
To reduce risks of long-lived GPG keys circulating on the internet, we regularly renew our key. The table below lists expired and revoked keys.

valid fromvalid toFingerprint/Key ID
2019-03-032019-06-011C3D DFF7 2961 7BFC 7544 3E3B E545 30DB 4072 2A8A
2018-12-112019-03-114726 F48E 5607 B8A6 06CA F4F9 09D3 4CFA C102 617D
2018-09-252018-12-24ED21 9FFD 58F0 B467 223A 6312 D9FE 497B B424 11ED
2018-06-122018-09-10708C A4E3 8A9B E257 748D 01C9 172B AD3E 40AA EA08