33Mail vs addy.io

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.

addy.io creates email aliases that forward messages to a real inbox, allowing users to give out aliases instead of their main address. An alias can be deactivated to silently discard new mail or deleted so senders receive a bounce. Users can connect a domain they control and set catch-all controls. Paid features allow replying to forwarded messages or starting messages from an alias without revealing the real address. Users can add GPG/OpenPGP public keys for recipients to encrypt forwarded mail, with an option to hide and encrypt the subject. The maker lists free open-source apps for iOS and Android, browser extensions for several browsers, and an API for automating aliases and other account resources. Self-hosting instructions and two-factor authentication are also available. The free plan includes unlimited standard aliases, but sets limits for shared-domain aliases, recipients, available alias domains, and monthly bandwidth. Paid plans start at $1 a month billed yearly; higher tiers list more recipients and custom domains, among other additions.