The best free email with end-to-end encryption (E2EE)

The best free email with end-to-end encryption (E2EE)

Here are some of the best free email services that support end-to-end encryption (E2EE):

Proton Mail

Offers end-to-end encryption ensuring only the sender and recipient can read emails, not even Proton Mail itself.
Free plan includes 500 MB storage and daily sending limits.
Based in Switzerland and open source with strong privacy laws protecting user data.
Does not support POP3/IMAP in free plan.

Tutanota (Tuta Mail)

Provides full end-to-end encryption including email body, attachments, and subject lines with quantum-resistant algorithms.
Free plan includes 1 GB storage and unlimited messages.
Open source, GDPR compliant, and uses green energy data centers in Germany.
Supports two-factor authentication and anonymous signup.
No IMAP/SMTP support to ensure encryption integrity.

Mailfence

Supports OpenPGP end-to-end encryption and digital signatures.
Free plan includes 500 MB email storage and 500 MB document storage.
Based in Belgium with strong European privacy protections.
Offers calendars, cloud docs, and contact management.

Atomic Mail

Newer service with strong encryption options including E2EE and password-based encryption.
Free plan includes unlimited storage and messages, 10 aliases, and no ads.
Servers in Germany with GDPR compliance and eco-friendly data centers.

Anonymous registration allowed.

Zoho Mail

Supports up to 5 users per organization.
Provides 5GB of email storage per user.
Allows hosting of one custom domain for professional email addresses.
Access is webmail only (no IMAP, POP, or ActiveSync in the free plan).

Other options like PrivateMail provide strong encryption but typically only offer paid plans.

The best free email with end-to-end encryption (E2EE)

Summary Table:

Email Service	Free E2EE Support	Storage	Remarks
Proton Mail	Supports end-to-end encryption	500MB	Does not encrypt subject, restricted in some regions
Tuta Mail	Supports full end-to-end encryption	1GB	Includes encryption of subject and attachments
Mailfence	Supports OpenPGP encryption	About 500MB	Based in Belgium, feature-rich
Zoho Mail	Supports S/MIME/OpenPGP	5GB	Free version limits some advanced features
Atomic Mail	Supports full end-to-end encryption	Unlimited	Encrypts subject, attachments; no ads; modern secure option

Proton Mail and Tutanota stand out as the most mature and widely used free E2EE email providers as of 2025, while Atomic Mail is an emerging strong contender for free secure email communication.

Among popular free email providers supporting end-to-end encryption (E2EE):

Tuta Mail encrypts not only the email content and attachments but also the subject lines and some metadata, providing deeper privacy protection than most providers.
Atomic Mail encrypts emails, including subject lines and attachments, directly on your device, so only you and the recipient can read them. The service ensures complete privacy as it cannot access or decrypt your messages.
Proton Mail supports E2EE for the email content and attachments but does not encrypt the subject lines. Subject lines remain visible to the service and could be accessed if legally compelled.
Mailfence supports OpenPGP encryption which can encrypt attachments, but subject line encryption depends on the email client used.
Zoho Mail supports S/MIME/OpenPGP encryption options for attachments; subject line encryption is generally not standard.