Underpass free download for Mac


31 March 2020

Encrypted chat/file transfer for complete privacy and security.


Underpass is different from every other encrypted chat app because it does not use a third-party service. It's just two devices and a password. Peer-to-peer. There's no signup. No account. No phone number, email, contacts, or any personal information requested, not even your real name.

You can chat securely over the internet or on a LAN, such as in an office, school, coffee shop, or home. All of your data is encrypted before it's sent over the network, and it can't be decrypted except by the other device using Underpass. Industry-standard AES-128 encryption algorithm.

  • File transfers of any file type
  • Inline images, including animated gifs
  • Unicode text and emoji

What's new in Underpass

Version 1.2.0:
  • The find bar is enabled in the received messages list.
  • Keyboard shortcut command-0 to open the Saved Chats window.
  • Fixed a rare App Store receipt validation issue that could occur while using AirPlay 2 over wired ethernet.

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