Tuta (formerly Tutanota), founded in 2011 in Hanover, Germany, is a pioneer in end-to-end encrypted email. Features the proprietary TutaCrypt encryption protocol, fully open source codebase, and a 1GB free plan.
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Proton Mail was founded by CERN scientists in 2014, headquartered in Geneva, Switzerland. It is the world's most trusted end-to-end encrypted email service, offering free 500MB storage with 150 emails/day and paid plans with more features and storage.
Neo Mailbox was founded in 2015, headquartered in Switzerland, offering encrypted email with built-in OpenPGP end-to-end encryption, anonymous registration, and Swiss legal protection. Integrated calendar and contacts for privacy-conscious individual users.
Mailpile was founded in 2013, headquartered in Reykjavík, Iceland. It is a fully open source (AGPLv3) email client supporting self-hosted deployment, OpenPGP encryption, and a powerful email search engine. Users maintain complete control over their email data.
Kolab Now, founded in 2008 in Switzerland, is built on the open-source Kolab groupware framework. It offers end-to-end encrypted email, calendar, contacts, tasks, and file management as a secure collaboration suite under Swiss privacy law.
CTemplar was founded in 2016, headquartered in Iceland, providing military-grade encrypted email with AES-256 and OpenPGP dual-layer protection. Fully anonymous registration supported by Iceland's strict privacy laws. Designed for users with extreme privacy requirements.
CounterMail was founded in 2011, headquartered in Sweden, featuring a unique diskless storage architecture — emails exist only in RAM and vanish on power loss. Built-in OpenPGP encryption with anonymous registration. Designed for extreme privacy temporary communications.
Skiff is an end-to-end encrypted, privacy-first email platform founded in 2020 in San Francisco, offering encrypted mail, document collaboration, and cloud storage in one integrated workspace. Acquired by Notion in 2024.
StartMail is a privacy-first encrypted email service from the Netherlands, built by the team behind Startpage.com, featuring built-in PGP encryption that works without manual key configuration.
Founded in 2014 in the Netherlands, Soverin is a privacy-first paid email service. At €3.25/month with no ads, custom domain support, and 100% green energy hosting, it is designed for users who value privacy and environmental sustainability.
Runbox, founded in 1999 in Oslo, Norway, is a veteran independent email hosting provider in the Nordic region. Features 100% renewable energy data centers and Norwegian privacy protection for standard email hosting.
Posteo is a green encrypted email service from Berlin, Germany, offering 100% renewable energy-powered secure email at just €1/month with anonymous registration and server-side encryption.