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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.


What's New in Underpass

Version 1.1.2:
  • Added a number of submenus and items under Edit in the main menu.
  • Respect the System Preferences for Keyboard, Text while typing. This allows text substitutions, for example.
  • Disable data detectors by default in the messages view. You can enable them manually.

Requirements for Underpass

  • OS X 10.12 or later
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Underpass User Discussion

Current Version (1.x)
Downloads 158
Version Downloads 41
License Shareware
Date 05 Jan 2019
Platform Intel 64 / OS X
Price $6.99
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