Screenshot of Penango for Gmail

Secure messaging. For everyone.

Penango is a web browser add-on that allows people to send and receive authenticated and encrypted messages end-to-end on the Internet with standards-based, interoperable protocols.

Penango for Gmail and Google Apps (FREE!)

Penango for Google Apps, Gmail, and Zimbra ($21.95/year/mailbox)

Sign, encrypt, and decrypt e-mail messages in free Gmail and free Google Apps. For Firefox and Internet Explorer. Sign, encrypt, and decrypt e-mail messages in Google Apps for Business, Nonprofits, Education, and Government; paid Gmail; and Zimbra accounts. For Firefox and Internet Explorer.
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