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K-9 Mail

K-9 Mail is the go-to mobile secure email application for Internet Freedom defenders globally. An open-source security-enhancing email app available on mobile Android devices, K-9 is the most widely used encrypted email platform available through the Google Play store, with between 5 and 10 million downloads and availability in more than 30 languages. A key K-9 feature is its compatibility with PGP encrypted mail, allowing human rights activists, journalists, and other at-risk users to secure their mail in a usable, reliable way. K-9 is open-source and community-developed, welcoming reviews, suggestions, and scrutiny - further enhancing K-9’s security and transparency.

Funding to date

$86 000
12 months
Total funding: 
$86 000
Core issues: 
Privacy enhancement Security from danger or threat online
Current project status
  • Just an Idea (Pre-alpha)
  • It Exists! (Alpha/Beta)
  • It's basically done. (Release)
  • People Use It. (Production)
Technology development
Software or hardware development
General public
Sexual minorities
Ethnic minorities
Advocacy groups/NGOs
Addressed problems
Blocking, filtering, or modification of political, social, and/or religious content (including apps)
Technical attacks against government critics, journalists, and/or human rights organizations (Cyberattacks)
Repressive surveillance or monitoring of communication
Policies, laws, or directives that increase surveillance, censorship, and punishment
Technology focus
Application deployment
Mobile application (clientside)

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