Growth · alternatives · 2026

24 alternatives to Tutanota

Secure email for everybody

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Tutanota launched in 2019; newer entries below may have overtaken it.

1. 1
   Tutanota▲6

   Encrypted. open-source email & calendar service

   2019 · tuta.com · its alternatives →

2. 2
   Tutanota▲11

   Encrypted email & calendar

   2019 · mail.tutanota.com · its alternatives →

3. 3
   Exchange end-to-end encrypted emails with anybody▲8

   Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices. - tutao/tutanota

   2014 · github.com · its alternatives →

4. 4
   Tutanota▲2

   Get your encrypted mailbox for free.

   2015 · tuta.com · its alternatives →

5. 5
   Turtl – A secure, encrypted Evernote alternative▲236

   The safe way to remember everything. Take all your important data with you.

   2016 · turtl.it · its alternatives →

6. 6
   We’ve created Tutanota, an encrypted email App (GPLv3)▲5

   Tuta guarantees your data stays private for free & without ads. Quantum-resistant encryption makes Tuta the best secure technology solution to protect your privacy.

   2014 · tutanota.com · its alternatives →

7. 7
   opensend.ccfree▲160

   The open source email platform that runs on your server

   22d ago · opensend.cc · its alternatives →

8. 8
   Trumail▲215

   Free email verification API

   2017 · emailable.com · its alternatives →

9. 9
   Turtl▲131

   Your open source private space (Evernote alternative) 🐢

   2017 · turtlapp.com · its alternatives →

10. 10
    Tusk▲128

    A refined open-source desktop app for Evernote 🐘

    2019 · github.com · its alternatives →

11. 11TP
    TutaCrypt, post-quantum encryption protocols for securing emails [pdf]▲15

    Hi HN, we are the developers from Tuta (formerly Tutanota), the German end-to-end encrypted email provider, and we recently released the world's first post-quantum encryption for email. We have included a full technical write-up of the cryptography involved in these changes and we have released it for open public review. This document specifies TutaCrypt, a protocol designed for hybrid email encryption in Tuta Mail. The protocol combines a classical Elliptic-Curve-Diffie-Hellman key exchange with a post-quantum KEM. The goal is to replace the usage of RSA in Tuta Mail. In the remainder of…

    2024 · tuta.com · its alternatives →

12. 12
    Kanmail – An email client that functions like a kanban board▲271

    📥 Turn your inbox into a kanban board. Contribute to Oxygem/Kanmail development by creating an account on GitHub.

    2020 · github.com · its alternatives →

13. 13
    Transactional Email Templates by Postmark▲210

    Open source email templates for use in your SaaS app.

    2018 · postmarkapp.com · its alternatives →

14. 14
    ProtonMail▲199

    End-to-end encrypted email - now on iOS & Android

    2016 · proton.me · its alternatives →

15. 15
    AtMailWin▲82

    Winning cold mailing campaigns

    2023 · its alternatives →

16. 16
    Emailgurus - Open Source▲111

    Keep your Gmail inbox focused on people you know

    2022 · keepknown.com · its alternatives →

17. 17
    OpenBSD Email Service – A free-email alternative▲215

    OpenBSD Email Service. Contribute to vedetta-com/caesonia development by creating an account on GitHub.

    2018 · github.com · its alternatives →

18. 18
    Dash▲122

    Private, encrypted OSS notes app

    2025 · dashnote.io · its alternatives →

19. 19
    SuperTokens▲146

    Open source email & password auth for developers

    2020 · supertokens.com · its alternatives →

20. 20
    email - Send emails easily in Go▲69

    Robust and flexible email library for Go. Contribute to jordan-wright/email development by creating an account on GitHub.

    2014 · github.com · its alternatives →

21. 21EE
    Easy Email Encryption inside Gmail (Alpha, Open-Source)▲170

    Manage sales and customer relationships directly inside Gmail. Streak is the CRM your team will actually use—integrated, smart, and loved by 750,000+ users.

    2013 · streak.com · its alternatives →

22. 22
    Mailfence secure and private email▲11

    Easy to use end-to-end encrypted email.

    2016 · mailfence.com · its alternatives →

23. 23
    MeSign app▲63

    Automated end-to-end encrypted email client

    2020 · its alternatives →

24. 24
    Just Mail▲64

    Secured email platform based on distributed storage network

    2014 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →