4SecureMail vs Tuta Mail

4SecureMail provides secure email accounts and managed email hosting for businesses and consumers. Accounts support POP, IMAP, and SMTP with SSL/TLS and work with standard clients such as Outlook and Thunderbird. SecureVault encrypts sensitive outgoing email for outside recipients, who read and reply through a secure web link. Spam protection includes SpamAssassin and a challenge/response whitelist; a server-based ICSA-certified virus scanner is also included. The FAQ says SSL/TLS sessions begin before login credentials are exchanged, and that TLS 1.2 and Perfect Forward Secrecy are supported. The company describes support for HIPAA, GLB, and SOX, can provide or review a Business Associate Agreement, and offers off-site legal archiving at additional cost. IMAP IDLE notifications and simultaneous connections from multiple devices are supported. Outgoing attachments can total up to 5 GB across all recipients. Plans range from one mailbox with 500 MB of storage and no custom domain to options with multiple mailboxes, more storage, and custom domains. The service has no free plan but offers a free trial; listed pricing starts at $8.24/mo. It is available worldwide to holders of major credit cards and supports U.S. currency.

Tuta Mail is an encrypted email service with apps for Android, iOS, Windows, macOS, and Linux, plus browser access. It includes an encrypted calendar and supports offline use; full offline support is listed among paid-plan benefits. The free plan provides 1 GB of storage, one calendar, and three labels. Revolutionary costs €3 a month billed annually and includes 20 GB, 15 extra email addresses, and three custom domains. Legend costs €8 a month billed annually and includes 500 GB, 30 extra email addresses, and 10 custom domains. Paid plans support calendar sharing and event invitations; desktop clients can import EML or MBOX files. Tuta says its clients are open source and auditable, and its data is stored on its servers in Germany in ISO 27001 certified data centers. The service uses post-quantum cryptography, and mail protocol support is listed as none. Family multi-user support can be activated through support on paid plans. Priority email support replies within one business day on Legend.