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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.

Features:

What's New

Version 1.0.2:
Enhancements:
  • A few more tests were added to supplement the current tests for detecting unwanted connection attempts. For your protection, Underpass has always checked for potentially suspicious connection attempts and will automatically disable the "listen for partner" feature if it ever detects too many connection attempts deemed suspicious
Bug Fix:

More...

Requirements

  • OS X 10.11 or later

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Details

Downloads 18
Version Downloads 18
License Commercial
Date 15 May 2017
Platform Intel 64 / OS X
Price $0.99
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