Life & fun · alternatives · 2026
24 alternatives to TutaCrypt, post-quantum encryption protocols for securing emails [pdf]
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…
TutaCrypt is a post-quantum encryption protocol developed by Tuta, a German end-to-end encrypted email provider. The protocol secures emails by combining classical Elliptic-Curve-Diffie-Hellman key exchange with… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. TutaCrypt, post-quantum encryption protocols for securing emails [pdf] launched in 2024; newer entries below may have overtaken it.
- 1EE
Hi HN, we have recently completed a research project on how to encrypt emails with post-quantum secure algorithms as well as Forward Secrecy. We'd love to hear your feedback and discuss technical issues. The paper can be found here: https://eprint.iacr.org/2021/875
2021 · its alternatives →
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filippo.io/mlkem768 is a pure-Go implementation of the post-quantum key exchange mechanism ML-KEM-768 optimized for correctness and readability.
2024 · words.filippo.io · 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 →
- 4
Get free email forwarding for custom domains. Send & receive as [email protected] with unlimited aliases, 10GB storage, IMAP/POP3/SMTP & 100% open-source security. Trusted by 500K+ users. Setup in 2 minutes.
2023 · forwardemail.net · its alternatives →
- 5
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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The safe way to remember everything. Take all your important data with you.
2016 · turtl.it · its alternatives →
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Access Vault▲21Post-Quantum Credential Management Made Easy
2025 · accessvault.app · its alternatives →
- 10
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ProtonMail▲199End-to-end encrypted email - now on iOS & Android
2016 · proton.me · its alternatives →
- 12
- 13EI
2014 · diafygi.github.io · its alternatives →
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Qpher▲4Post-quantum encryption & signing — drop-in REST APIs
Jun 2026 · qpher.ai · its alternatives →
- 23
Messaging app with password encrypted messages and much more
Feb 2026 · evercrypted.com · its alternatives →
- 24
Also compare
- Encrypted emails based on Signal protocol with post-quantum algorithms alternatives
- filippo.io/mlkem768 – Post-Quantum Cryptography for the Go Ecosystem alternatives
- We’ve created Tutanota, an encrypted email App (GPLv3) alternatives
- Forward Email – Open-Source Quantum Safe Encrypted Email Service alternatives
- Exchange end-to-end encrypted emails with anybody alternatives
- Turtl – A secure, encrypted Evernote alternative 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 →