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AI tools for secure email

6 tools, ranked by our overall rating.

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1

Proton Mail

Proton

4,0 Very good
Best privacy
EU-approved third country Secure email Freemium ISO 27001

Encrypted email from Switzerland, built for privacy. Popular European alternative to Gmail and Outlook.

  • Strong encryption and privacy
  • Data is processed by default in Switzerland, which has an EU adequacy decision
  • Switzerland is outside the EU (but has an adequacy decision)

Best for: Businesses that want secure email outside the American giants.

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2

Tuta

Tuta

3,8 Good
German/EU
EU/EEA Secure email Freemium EU data storage βœ“

German encrypted email and calendar, entirely within the EU. A GDPR-clean alternative to Gmail.

  • German, entirely within the EU
  • Encrypted by default
  • Fewer features than Google Workspace

Best for: Privacy-conscious businesses that want to keep everything within the EU.

3

mailbox.org

Heinlein Support GmbH

3,5 Good
EU/EEA Secure email From approx 12 SEK/month EU data storage βœ“ ISO 27001

German secure email with calendar, office and cloud storage, run in own Berlin data centres under German data protection law. The catch: business accounts require your own domain and PGP encryption needs to be configured manually.

  • German, own data centres in Berlin under GDPR
  • ISO 27001 certified and tested against BSI C5
  • Business accounts require own domain

Best for: Companies that want a complete GDPR-clean Google Workspace alternative entirely within the EU.

4

Mailfence

Mailfence

3,5 Good
EU/EEA Secure email Freemium EU data storage βœ“

Belgian secure email with encryption, calendar and documents.

  • Belgian, within the EU
  • Encryption and calendar
  • Less well-known

Best for: Those who want a Belgian EU-based email alternative.

5

CrossPeak Software

CrossPeak Software, LLC

3,0 Good
Outside EU Web & app building From approx 49 SEK/month

WordPress plugins that extend Gravity Forms (encryption, export, form mapping), WooCommerce (address book, product videos) and connect Gravity Forms to Klaviyo. American company.

  • Specialized plugins for Gravity Forms, the most common form tool in WordPress
  • Encryption plugin for Gravity Forms protects sensitive submitted data
  • American company with data storage in the USA

Best for: Web agencies and WooCommerce stores that already use Gravity Forms and want add-ons for encryption, address management or Klaviyo integration.

6

Runbox

Runbox Solutions AS

2,8 Okay
EU/EEA Secure email From approx 20 SEK/month EU data storage βœ“

Norwegian email service that runs its servers on Norwegian hydropower and is subject to Norwegian and European privacy protection. The catch: smaller operator with a simpler interface and no built-in end-to-end encryption by default.

  • Norwegian (EEA), subject to European privacy protection
  • Servers powered by 100% renewable Norwegian hydropower
  • No end-to-end encryption by default (PGP via browser)

Best for: Environmentally conscious companies that want stable email within the EEA without getting stuck with the American giants.