Freedom from Chaos
Waste less time finding browser tabs.
Access all your messages, calendars, and contacts in one fast app. Filter and organize the way you like. Manage all accounts separately or in a unified inbox. Thunderbird simply makes your life simpler.
Thunderbird is a free email client for Windows, macOS and Linux — built by an independent non-profit and trusted by millions of users worldwide. Unlike web-based email services, Thunderbird runs directly on your desktop, keeping your messages and data under your control. There are no ads, no subscription fees, and no algorithms deciding what you should read first.
As a free, open-source email client, Thunderbird has been developed in public for over 20 years. It supports every major email provider — Gmail, Outlook, Yahoo, iCloud, ProtonMail — and works with any account that uses IMAP or POP3. A built-in calendar, contacts manager, and support for hundreds of extensions make it a complete alternative to paid desktop email software.
Freedom from Manipulation
Our agenda isn’t hidden. It’s to make the world better.
Thunderbird is funded by user donations. We don’t collect personal data, sell ads in your inbox, or secretly train AI with your private conversations. Thunderbird is open source. As part of the Mozilla family you can be confident we always put your privacy and security first.
Freedom to Geek Out
Thunderbird is yours.
Thunderbird is clean and elegant by default, but easily customizable to match your workflow and visual preferences. It is loaded with unique and powerful features. Here are just a few that people love:
“Its unified inbox enables me to stay sane even in the busiest of times. I am never switching e-mail clients again!”
“I love the tag feature. I tag something important and find it quickly.”
“It is the first program I install on any PC I use / own… I use it on Windows / Mac and Linux.”
“Having an open source alternative [for] receiving and managing email… is great for privacy.”
“You’d be hard pressed to find a client more extensible than Thunderbird!”
“[Thunderbird] empowers me to maintain ownership of my emails.”
Freedom to Go Anywhere
Introducing Thunderbird Mobile
The freedom and joy of Thunderbird are now available to you anywhere you go. With Thunderbird Mobile your most important messages are sent and received by an open-source, secure app that respects your privacy.
