PostGuard
PostGuard offers free and easy-to-use end-to-end-encryption for emails and files. Only the intended recipients can decrypt and read the emails and files you send with PostGuard.
Send large files. Without limits that get in the way.
Most encrypted file-sharing services cap free transfers at just a few hundred megabytes. PostGuard lets you share much more — completely free.
Send a single file or a whole batch — up to 5 GB in one encrypted transfer.
Up to 5 GB of encrypted file sharing per email address, over a rolling 14-day window.
No account. No payment. End-to-end encrypted, always.
Why PostGuard?
Most email applications (like Apple Mail, Gmail and Outlook) and file sharing applications do not apply end-to-end encryption by default. This means that unauthorized parties could access and tamper with your emails and files. This is not appropriate for emails and files containing sensitive information.
End-to-end encrypted
Your files are encrypted in your browser before they leave your device. We never see your unencrypted data.
Identity-based
No key exchange needed. Recipients prove their identity with the Yivi app to decrypt files.
Free & open source
PostGuard is developed by Radboud University and freely available for everyone.