Enigmail is a data encryption and decryption extension for Mozilla Thunderbird and the SeaMonkey internet suite that provides OpenPGP public key e-mail encryption and signing. Developed by The Enigmail Project
License: Open Source
Enigmail is an open-source plugin for email encryption focused on providing PGP encryption within Thunderbird, while Lavabit is a privacy-centric email service that emphasizes end-to-end encryption and user data control. Enigmail is better suited for users needing encryption for existing email clients, whereas Lavabit offers a complete email service with strong privacy protections.