Cock.li vs Tuta Mail

Cock.li is a public email host from Cock.li, founded in 2013, offering email accounts and webmail through the web, Android, and iOS. Its services are free, with the Free plan listed at free. Mail access includes IMAP and POP at mail.cock.li, while XMPP is listed at xmpp.cock.li. Registration does not require personally identifiable information. New accounts cannot send mail until the user completes a browser proof-of-work challenge that uses a few minutes of CPU time. Cock-mail is described as an open-source, client-side webmail client connecting directly to the IMAP server over websockets, but its 0.0.1 alpha release lacks major features including SMTP. The privacy policy says registration details, stored mail, XMPP data, and 48–72 hours of IMAP and SMTP logs may be retained. Email is automatically scanned for spam. Account information is encrypted server-side, but mail may travel without encryption when TLS is unavailable or not attempted.

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.