Alternatives to Gmail for all platforms with Open Source License

  • Tutanota

    Tutanota is a free and open source web-mail client that focuses on privacy and security. It has open source iOS and an Android apps. The Android app is published on...

    • Tutanota is the best choice, because it is simple and run by an awesome team. Even the Premium prices are very affordable. onuniJan 2017 • 5 agrees and 0 disagrees Disagree   Agree
    • Tutanota is a good Gmail replacement for most of the same reasons Protonmail is: Your email is stored encrypted on Tutanota servers in a way that neither they nor any potential hackers can decipher it. This means your emails can't be scanned to profile you and sell your private information for profit, which is how Gmail makes its money. Tutanota also enables encrypted email communication which Gmail does not. It's user friendly and more features are on the way. JohnFastmanDec 2016 • 7 agrees and 3 disagrees Disagree   Agree
    • I've tried some encrypted emails to replace Gmail, it turned out that Tutanota is perfect. All services accepted it without any problems, all messages arrived fast and the free plan gives 1GB of space. Also, the paid plans are generous and cheap. marriemullerDec 2017 • 3 agrees and 0 disagrees Disagree   Agree
    • Lightweight GUI to the browser and the user, fast, secure and can manage custom domains. yieldMar 2016 • 4 agrees and 2 disagrees Disagree   Agree
    • This is a very good free client. It gives you lots of functionality even at no cost. Guest • Jan 2018 • 1 agrees and 0 disagrees Disagree   Agree
    • Tutanota is a great email provider with very good encryption (it uses end-to-end encryption like Signal – i.e. they cannot read your emails/gife them to the government, Gmail can!) and they don't sell any data. It is also very easy to use, it has a very nice app, a desktop client and a web client. There is really no reason why you wouldn't want to use it :) justinterestedJan 2019 Disagree   Agree

    Free Personal $ $ $ Open Source Web Android iPhone iPad F-Droid

    Tutanota icon
  • Mailpile

    Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and...

    • Mailpile is a mail client not provider Guest • Nov 2015 • 5 agrees and 1 disagrees Disagree   Agree
    • This is mail client, not a mail provider Guest • Jan 2019 • 2 agrees and 1 disagrees Disagree   Agree

    Free Open Source Mac Windows Linux Web Self-Hosted ... OpenPGP

    Mailpile icon
  • Posteo

    Web- and IMAP-based email service. 2GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used.

    • Posteo has very good data encryption and privacy. Guest • Feb 2018 • 2 agrees and 0 disagrees Disagree   Agree
    • Very comprehensive privacy, affordable price and sustainable practice. Also provide interface for notes, calendars and contacts sync. ZakhamApr 2018 • 1 agrees and 0 disagrees Disagree   Agree
    • The most secure and private email on the market. As such, there is not free version. This is a good thing, it means they are not making money with your information. lazysami0014 days ago Disagree   Agree
    • Love Posteo - very good encryption and very affordable: you pay with money, not with your data. If they also supported own domains, I'd move my professional mail there as well. ArianaMar 2017 • 2 agrees and 3 disagrees Disagree   Agree

    Commercial $ $ $ Open Source Web

    Posteo icon
  • Horde

    Horde Groupware is a free, enterprise ready, browser based collaboration suite. Users can manage and share calendars, contacts, tasks and notes with the standards...

    • Horde is a mail client, not provider Guest • Nov 2015 • 2 agrees and 0 disagrees Disagree   Agree
    • Horde is included in CPanel accounts as well as Roundcube and Squirrelmail. Guest • Sep 2017 Disagree   Agree

    Free Open Source Web Self-Hosted

    Horde icon
  • Webmail Lite

    Open Source WebMail Lite is a free community edition of full-featured WebMail Pro server application intended for users who need a clean and simple web mail...

    Free Open Source Web Self-Hosted

    No features added Add a feature

    Webmail Lite icon
  • Fripost

    Fripost – the Free Email Association. Fripost organize the people who want an alternative to "free" e-mail services where you are constantly under...

    Commercial Open Source Web

    Fripost icon

    Non-commercial provider of privacy friendly communication. Without surveilliance.

    Free Open Source Web

    No features added Add a feature icon
  • NaSMail

    NaSMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in HTML 4.01...

    Free Open Source Web

    No features added Add a feature

    NaSMail icon
  • Inout Webmail

    Developed to assist small/medium sized business for business emails just like Gmail or Outlook.

    Commercial $ $ $ Open Source Mac Windows Linux

    No features added Add a feature

    Inout Webmail icon



Web / Online

Show 6 less popular platforms