Thunderbird

A free email application that's easy to set up and customize.

Facts from thunderbird.net, checked November 14, 2026.

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At a glance

Thunderbird is listed under Email clients, alongside BlueMail, Canary Mail and eM Client.
Thunderbird has a free plan.
Thunderbird is available on Windows, Linux, macOS and Android.
Thunderbird's main features: Unified inbox, Email, calendar, contacts, Tags and filters, Customizable, Mobile app.
We haven't confirmed whether Thunderbird has a public API.

Facts from thunderbird.net, checked November 14, 2026.

AI summary

The summary writes itself once 5 people have reviewed this tool.

It's built only from what reviewers say: who it's best for, who should think twice, and what comes up again and again.

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