33Mail vs SimpleLogin

33Mail creates private email aliases and forwards messages sent to them to an existing email address. An alias is created automatically when email first arrives, and users can block an alias to stop receiving its messages. With anonymous replies enabled, users can reply to forwarded mail through 33Mail; the service removes header information relating to their actual email address. Premium accounts can use a custom domain by pointing its MX record to 33Mail. The service is web-based and also lists a browser extension. Lite is free and includes 10MB monthly bandwidth, with alias creation limited to five per 30-minute period. Premium costs $1 a month and includes 50MB monthly bandwidth, 20 anonymous replies per day, one custom domain, and one additional username. Pro costs $5 a month; Enterprise costs $50 a month. Attachments up to 10MB count toward bandwidth, which is measured over a rolling 30-day window. 33Mail says it warns users who exceed their bandwidth limit and treats dropping emails as a last resort. Its terms say user data is used to provide the service and is not shared with third parties except as needed for law enforcement requests. Brothers Ian and Andrew Clarke conceived the service, which forwarded its first email in August 2010.

SimpleLogin creates email aliases that forward messages to a mailbox while keeping a user's real address hidden. Users can reply to messages or send mail from an alias. Aliases can be created with a subdomain or catch-all domain, and users can bring their own domain. With PGP enabled, messages are encrypted with the user's PGP key before forwarding. Accounts support TOTP and/or WebAuthn two-factor authentication. SimpleLogin says its components are open source and can be self-hosted. It lists Chrome, Firefox, and Safari extensions, plus iOS and Android apps, including Android through F-Droid. The Free plan costs nothing and includes 10 aliases, one mailbox, and unlimited bandwidth; users cannot create more aliases after reaching the cap. Premium costs $36/year or $4 billed monthly, and includes unlimited aliases, custom domains, and mailboxes, plus PGP encryption. Free and Premium plans include the corresponding Proton Pass features. SimpleLogin says it joined Proton in early 2022.