Thunderbird

Free, open-source email, calendar and contacts app

A free, open-source desktop and mobile email client from MZLA/Mozilla with calendar, contacts, chat and add-ons, working with any email account.

Visit Thunderbird ↗

Pricing: Free

Platforms: Mac, Windows, Linux, Android, iOS

Categories: Productivity

Thunderbird is an alternative to

Microsoft Outlook · Apple Mail

Thunderbird compared with similar tools

Product	Price	Open source	Self-host	Platforms
Thunderbird	Free	Yes	–	Mac, Windows, Linux, Android, iOS
eM Client	Free plan	–	–	Windows, Mac, iOS, Android
Betterbird	Free	Yes	–	Windows, Mac, Linux
Mailspring	Free plan	Yes	–	Mac, Windows, Linux
HEY	Paid	–	–	Web, Mac, Windows, Linux, iOS, Android
Freeplane	Free	Yes	–	Mac, Windows, Linux
MailMate	Paid	–	–	Mac

Similar to Thunderbird

eM Client

Email client with calendar, tasks and contacts

A desktop and mobile email client with integrated calendar, tasks, contacts, chat and PGP encryption.

Free plan · Windows, Mac, iOS, Android · Website ↗

Betterbird

Fine-tuned fork of Thunderbird

A free, open-source fork of Thunderbird with extra features and bug fixes for desktop email.

Free · Windows, Mac, Linux · Website ↗

Mailspring

Free, fast desktop email client

An open-source desktop email client with a unified inbox, snooze, send later and optional paid features like read receipts.

Free plan · Mac, Windows, Linux · Website ↗

HEY

Email service with screening and a calmer inbox

An email service from 37signals that screens first-time senders, separates newsletters and receipts and blocks spy pixels.

Paid · Web, Mac, Windows, Linux, iOS, Android · Website ↗

Freeplane

Free, open-source mind mapping and knowledge management

A free, open-source desktop app for mind mapping and organizing information, a fork of FreeMind with scripting and add-ons.

Free · Mac, Windows, Linux · Website ↗

MailMate

Keyboard-friendly IMAP email client for Mac

MailMate is a standards-focused IMAP mail client for macOS with Markdown composing, powerful search and smart mailboxes.

Paid · Mac · Website ↗

Canary Mail

Secure email client with encryption and AI

An email client with PGP encryption, read-receipt blocking, a unified inbox and AI assistance for any email provider.

Free plan · Mac, Windows, iOS, Android · Website ↗

Cal.com

Open-source scheduling infrastructure and booking links

An open-source scheduling platform for booking pages, team round-robin, routing forms and calendar integrations, available hosted or self-hosted.

Free plan · Web, Self-hosted, API · Website ↗

Questions

Is Thunderbird free?

Thunderbird is free.

Is Thunderbird open source?

Yes, Thunderbird is open source.

What platforms does Thunderbird run on?

Thunderbird is available for Mac, Windows, Linux, Android, iOS.

What are some alternatives to Thunderbird?

Similar indie products include eM Client, Betterbird, Mailspring, HEY and 4 more.

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