Thunderbird is Mozilla's long-running desktop mail client and the most capable free option for managing several accounts in one place. It ships with built-in OpenPGP encryption so you can sign and encrypt messages without add-ons and it also handles S/MIME. Being a client rather than a provider, your real privacy still depends on the mailbox you connect to it. It is open source, funded by donations, and now has an official Android app as well. The interface is utilitarian but few clients match its flexibility.
Thunderbird
Mozilla's free, open-source desktop mail client.
thunderbird.netFreeOpen SourceE2E EncryptedWindowsmacOSLinuxAndroidUnited States
PricingCompletely free; funded by user donations through MZLA Technologies, a Mozilla subsidiary.
Strengths
- Built-in OpenPGP encryption, no add-on needed
- Free, open source, and donation funded
- Manages many accounts across desktop and Android
- Backed by Mozilla via MZLA Technologies
Considerations
- Dated, utilitarian interface
- Setup can take patience
Listed inEmail Clients
