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Software · Internet & communication

Thunderbird

Thunderbird is a free and open source email, newsfeed, chat, and calendaring client.

  • Completely free
  • Windows, macOS, Linux and Android
  • Open source
  • No account

Overview

Thunderbird is an email client, available on Windows, macOS, Linux and Android.

Services and protocols mentioned: IMAP.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!” — official website, 10 November 2026

At a glance

Thunderbird is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (MPL-2.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • No account needed
  • No advertising
  • Commercial use allowed

About

Thunderbird is a free and open source email, newsfeed, chat, and calendaring client, that’s easy to set up and customize. One of the core principles of Thunderbird is the use and promotion of open standards - this focus is a rejection of our world of closed platforms and services that can’t communicate with each other. We want our users to have freedom and choice in how they communicate. Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Homebrew (platforms) —
  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from F-Droid (credit card, source code, licence, free status, platforms, ads, commercial use, version) —
  • Facts collected from Wikidata (licence, platforms) —
  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Facts collected from Winget (Windows Package Manager) (credit card, account, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Comptoir du Libre (source code, licence) —
  • Last technical check: 6 November 2026
  • Description from Flathub — AppStream (Flathub)

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