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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 Proton AG in Geneva, built for privacy and a popular European alternative to Gmail and Outlook. Data is processed by default in Switzerland under Swiss law, with a GDPR representative in the EU. There is a permanent free plan, and the paid plans come with a 14-day free trial.

  • Strong encryption and privacy focus under Swiss jurisdiction.
  • Data is processed by default in Switzerland, which has an EU adequacy decision.
  • Switzerland is outside the EU, even though the country has an adequacy decision.

Best for: A business that wants to move its email away from the American giants without leaving Europe, for example a consultancy handling sensitive client data.

Try Proton Mail → 14-day free trialAffiliate link Details
2

Tuta

Tuta

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

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

  • German company with all data within the EU
  • Encryption by default, not as an add-on
  • Not as broad a feature set as 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 ✓ ISO 27001

German secure email with calendar, office and cloud storage, run in its own Berlin data centres under German data protection law. Business accounts require your own domain, and PGP encryption is set up 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 ✓

Belgian secure email with encryption, calendar and documents.

  • Belgian company within the EU
  • Encryption, calendar and documents included
  • Less well-known than the major email providers

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 ✓

Norwegian email service that runs its servers on Norwegian hydropower and is subject to Norwegian and European privacy protection. The protection is solid, but the operator is small: the interface is older and end-to-end encryption is not included 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.