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.
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.
Mailfence was founded in 2017, headquartered in Brussels, Belgium, providing end-to-end encrypted email with built-in OpenPGP. Integrated calendar, contacts, and document storage with a free tier for basic secure communication.
Mailbox.org, founded in 2014, is Heinlein Support's green encrypted email service based in Berlin, Germany. Powered by OpenXchange, it offers encrypted business email, cloud storage, and online office suite starting at €1/month.
Founded in 1998 and headquartered in Waltham, Massachusetts, LuxSci is an enterprise-grade email service provider specializing in HIPAA-compliant email and secure communications. It offers end-to-end encryption, email archiving, and the SecureLine security portal — the preferred email infrastructure for healthcare and compliance-sensitive industries.
Founded in 1999 and headquartered in Vancouver, Canada, Hushmail is one of the oldest encrypted email providers, known for built-in OpenPGP encryption and HIPAA-compliant business email plans.