Thunderbird: Free Your Inbox

Name: Thunderbird: Free Your Inbox
Availability: InStock
Rating: 3.1600000858306885 (5702 reviews)
Author: Mozilla Thunderbird

Mozilla Thunderbird

In-app purchases

3.2

5.7K reviews

500K+

Downloads

Everyone

About this app

Thunderbird is a powerful, privacy-focused email app. Effortlessly manage multiple email accounts from one app, with a Unified Inbox option for maximum productivity. Built on open-source technology and supported by a dedicated team of developers alongside a global community of volunteers, Thunderbird never treats your private data as a product. Supported solely by financial contributions from our users, so you never have to see ads mixed in with your emails again.

What you can do

Ditch multiple apps and webmail. Use one app, with an optional Unified Inbox, to power through your day.

Enjoy a privacy-friendly email client that never collects or sells your personal data. We directly connect you to your email provider. That’s it!

Take your privacy to the next level by using OpenPGP email encryption (PGP/MIME) with the “OpenKeychain” app, to encrypt and decrypt your messages.

Choose to sync your email instantly, at set intervals, or on-demand. However you want to check your email, it’s up to you!

Find your important messages using both local and server-side search.

Compatibility

Thunderbird works with IMAP and POP3 protocols, supporting a wide range of email providers, including Gmail, Outlook, Yahoo Mail, iCloud, and more.

Why use Thunderbird

The trusted name in email for over 20 years - now on Android.

Thunderbird is fully funded by voluntary contributions from our users. We don’t mine your personal data. You are never the product.

Made by a team that is as efficiency-minded as you are. We want you to spend minimal time using the app while getting maximum in return.

With contributors from all over the world, Thunderbird for Android has been translated into more than 20 languages.

Supported by MZLA Technologies Corporation, a wholly owned subsidiary of the Mozilla Foundation.

Open Source and Community

Thunderbird is free and open source, which means its code is available to see, modify, use and share freely. Its license also ensures that it will be free forever. You can think of Thunderbird as a gift from thousands of contributors to you.

We develop in the open with regular, transparent updates on our blog and mailing lists.

Our user support is powered by our global community. Find the answers you need, or step into the role of a contributor - whether it’s answering questions, translating the app, or telling your friends and family about Thunderbird.

Updated on

3 Sept 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.

No data shared with third parties

Learn more about how developers declare sharing

This app may collect these data types

Personal info, Messages and 7 others

Data is encrypted in transit

You can request that data be deleted

Ratings and reviews

3.2

5.36K reviews

Frostwind

30 August 2025

I am incredibly upset that I keep getting a permanent notification about missing permissions to schedule alarms. If I don't want the app to do that, then I don't want to give it permission. Given the open-source nature of the program, it is very frustrating that this happens. The desktop version is wonderful on Linux, but fairly limited on mobile for some reason. At least don't bug users for permissions they do not want to give the app. It isn't a feature I use.

10 people found this review helpful

Mozilla Thunderbird

3 September 2025

We're sorry for any frustration with the permissions, and our system works this way as an additional layer of privacy protection on Android, bypassing many Google services. To avoid this, using polling which pulls email at a regular interval would probably the best option. We hope this helps explain our development choices!

coffee coffee

14 September 2025

Fantastic! Moved over once I found K9 became Mozilla's. They didn't yet rename it at that point & then split it off. Its been fantastic the entire time. Does all I need & works great for me. Obviously, using gmail app directly for gmail offers things it does not, but am not concerned about any of those things. They're also still working on it. While I understand why some people rate it low, even though I don't have issues, its still improving. Some people need that.

d p

24 July 2025

i thought i liked this email client at first, but not so much now. I've been intermittently getting error messages saying that the message failed to send when I'm trying to email attachments. they sit in the outbox, and then i open it, and it says message deleted, or sometimes it just removes the attachment after sending. since this is for work, i can't afford the time to troubleshoot why this keeps happening, so I'm moving on.

18 people found this review helpful

Mozilla Thunderbird

30 July 2025

Thanks for your feedback, and we're sorry for the frustrations with messages being stuck in the outbox (a possible solution is in 11.0) and with attachments disappearing. While we'd love to help troubleshoot at Settings > Get Help, we hope you try us again as we improve!