Growth · alternatives · 2026
24 alternatives to Tutanota
Encrypted. open-source email & calendar service
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Tutanota launched in 2019; newer entries below may have overtaken it.
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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 →
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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 →
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The safe way to remember everything. Take all your important data with you.
2016 · turtl.it · its alternatives →
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ProtonMail▲199End-to-end encrypted email - now on iOS & Android
2016 · proton.me · its alternatives →
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OpenNotas▲379The best personal note-taking app, fast, secure & free
2024 · opennotas.io · its alternatives →
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OI Calendar▲78Encrypted, decentralized alternative to Google calendar
2019 · cal.openintents.org · its alternatives →
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Turtl▲131Your open source private space (Evernote alternative) 🐢
2017 · turtlapp.com · its alternatives →
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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 →
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Canary Mail▲122Privacy-friendly email app for macOS, iOS & Android
2021 · play.google.com · its alternatives →
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Fully encrypted email app, hosted exclusively in Switzerland
2017 · swissfinancestartups.com · its alternatives →
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Keep your Gmail inbox focused on people you know
2022 · keepknown.com · its alternatives →
- 20EI
2014 · diafygi.github.io · its alternatives →
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Completely private chat email, w/ encrypted email messaging
2017 · spikenow.com · its alternatives →
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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 →