8kActiveWindows · Mac · Linux · Android · iPhone · In your browserGPL-3.0App
Tuta Mail is an email service with built-in end-to-end encryption, with open-source apps for web, desktop and phones. It is for people who want private email and are fine using Tuta's own hosted service, which cannot be self-hosted.
App · GitHub · Moves you to Tuta's own email service; other providers not supported
Not on GitHubActiveWindows · Mac · Linux · AndroidVerifiedMPL-2.0App
Thunderbird is a free, open-source email app for Windows, macOS and Linux that also includes calendars and contacts, with an Android app for email. It suits people who want to manage their email and calendars in one desktop program without relying on a big tech company.
App · Own website · Desktop and Android apps; no iPhone app
18kActiveWindows · Mac · LinuxGPL-3.0Replaces partlyApp
Mailspring is a desktop email app for Windows, Mac and Linux that lets you read and send email from one place. It is aimed at people who want a faster, lighter alternative to web-based or heavy mail clients.
7.2kActiveIn your browserGPL-3.0Replaces partlyRuns on your own server
Roundcube is a webmail program you install on your own server so you can read and send email in a web browser. It is meant for people or organizations who want to run their own email web interface.
Runs on your own server · GitHub · Inbox screen only; needs your own mail server
FairEmail is an email app for Android phones that works with most email providers, including Gmail and Outlook. It is aimed at people who want a privacy-focused way to read and send email.
App · GitHub · Android only
None of these match. Try another device.
Before you build
Planning something for an alternative to Gmail? See what exists first, so you can reuse parts or explain what's different. Paste this into any AI assistant:
Read the list of open-source alternatives at https://opensourceeverything.org/data/groups/email.json. Compare it with my project or idea below. Tell me which projects overlap, what I could reuse instead of rewriting, and what mine does that none of them do.
My project or idea:
Here is a list of open-source alternatives to Gmail, from Open Source Everything (CC BY-SA 4.0):
- Tuta (GPL-3.0, https://github.com/tutao/tutanota; replaces fully): Tuta Mail is an email service with built-in end-to-end encryption, with open-source apps for web, desktop and phones. It is for people who want private email and are fine using Tuta's own hosted service, which cannot be self-hosted.
- Thunderbird (MPL-2.0, https://www.thunderbird.net; replaces fully): Thunderbird is a free, open-source email app for Windows, macOS and Linux that also includes calendars and contacts, with an Android app for email. It suits people who want to manage their email and calendars in one desktop program without relying on a big tech company.
- Mailspring (GPL-3.0, https://github.com/Foundry376/Mailspring; replaces partly): Mailspring is a desktop email app for Windows, Mac and Linux that lets you read and send email from one place. It is aimed at people who want a faster, lighter alternative to web-based or heavy mail clients.
- Roundcube (GPL-3.0, https://github.com/roundcube/roundcubemail; replaces partly): Roundcube is a webmail program you install on your own server so you can read and send email in a web browser. It is meant for people or organizations who want to run their own email web interface.
- FairEmail (GPL-3.0, https://github.com/M66B/FairEmail; replaces partly): FairEmail is an email app for Android phones that works with most email providers, including Gmail and Outlook. It is aimed at people who want a privacy-focused way to read and send email.
Compare it with my project or idea below. Tell me which projects overlap, what I could reuse instead of rewriting, and what mine does that none of them do.
My project or idea:
