Secure Email Services

In today's digital age, using secure and encrypted email services is essential to protect sensitive information from cyber threats such as hacking, phishing, and data breaches. As more personal and professional communication occurs online, unencrypted emails can be easily intercepted, putting private data at risk. Encrypted email ensures that only the intended recipient can read the message, safeguarding confidentiality and maintaining trust. With growing concerns about privacy and surveillance, choosing a secure email service is a crucial step in protecting your digital identity.

• fully encrypted including subject line.
• zero knowledge encryption
• free plan with 1 gb storage
• encrypted calender, contact
• zero knowledge full text search
• custom domain support on paid plan
• anonymous payment through proxystore
• paid plan starting from €3/month
• catch-all custom domain
• Unlimited custom domain alias in all paid plan (from €3)
• Supoort of HSTS, DKIM, DANE, MITM(support of custom domain too)
• open-source
• IP stripping from sent emails
• TOTP & FIDO2 U2F support
• White label login via own domain.＊
  this is a business feature, and available only on expensive plan
• Based on Germany
• Additional feature : Calendar, Contacts; (their drive still is in development state)

Link: tuta.com

Why choose Proton:

• encrypted with openpgp(metadata is not encrypted)
• zero knowledge encryption at rest(not contacts)
• open-source
• free plan
• accepts cryptocurrency
• custom domain support on paid plan
• catch-all custom domain
• unlimited hide-my-email aliases via simplelogin.＊
  on expensive plan
• support of bridge app to use on any mail client in windows, mac & linux; also own native app＊
  only on paid plan
• TOTP & FIDO2 U2F support
• Supoort of HSTS, DKIM, DANE, MITM
• IP stripping from sent emails
• Self-destructing emails
• Password encrypt emails for outside users
• Based on Switzerland
• Additional feature: Calendar, Drive, Docs, Password Manager, vpn, wallet



Link: proton.me

• PGP encryption (either server-side for ease of use or using the Mailvelope plugin)
• PGP encrypted mailbox to secure all stored emails
• No free plan, 30 days trial free trial available
• plan starts from €1/month＊
  no custom domain support on this plan
• annonymous payment option via cash.
• custom domain support from €3/month plan
• catch-all custom domain
• TOTP support only as 2fa
• Supoort of PFS, HSTS, DKIM, DANE
• Based on Germany
• Additional feature: Online Office & Cloud Storage



Link: mailbox.org

• e2ee support via OPENPGP
• free plan
• custom domain support on paid plan
• catch-all custom domain
• TOTP support only
• Supoort of PFS, HSTS, DKIM, DANE
• IP stripping from sent emails
• Password encrypt emails for outside users
• accepts cryptocurrency
• Based on Belgium
• Additional feature: Documents

Link: mailfence.com

Honourable mention: Posteo(custom domain not supported), Startmail