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Kullo is a secure communication solution.

  • Communicate with your colleagues and friends across national borders and access your personal inbox on your mobile devices, no matter where you are.
  • We integrate industry leading end-​to-​end encryption right into the product. Literally no one apart from you and the recipient can read your documents - including us.
  • By hiding all the technical details and removing all distractions, you can simply focus on your content with your contacts.

Note: This application contains in-app and/or external

What's New

Version 55.0.0:

Note: Now requires OS X 10.10 or later.

  • Many invisible refinements under the hood
  • OSX: drop support for OS X 10.9 (Mavericks)
  • Update libkullo to v66
  • Update Qt to 5.9.2
  • Update SmartSqlite to v21
  • Update Botan to 2.3.0
  • Update cURL to 7.55.1


  • OS X 10.10 or later

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Kullo User Discussion


Current Version (55.x)


Downloads 154
Version Downloads 69
License Free
Date 17 Oct 2017
Platform Intel 64 / OS X
Price Free
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