My Apply
My Apply

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.

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Current project status

Just an idea (Pre-alpha)
It exists! (Alpha/Beta)
It's basically done (Release)
People use it (Production)

Funding to date

2015 $86,000 12 months

Total Funding: $86,000

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


  • Software or hardware development
  • Technology development


  • Advocacy groups/NGOs
  • Academia
  • Technologists
  • Ethnic minorities
  • General public
  • Women
  • Sexual minorities
  • Activists
  • Journalists

Region(s) archive

  • Global

Technology attributes

  • Application deployment
  • Mobile application (clientside)

We wrote about it