33Mail vs EmailAlias.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.

EmailAlias.io creates private forwarding aliases so services do not receive a user’s real email address. Mail forwards to an existing provider such as Gmail, Outlook, ProtonMail, Yahoo, or another inbox. Sender exposure scoring looks for risky domains, typosquatting, phishing keywords, and other leak signals, while machine-learning spam detection blocks phishing, malware, and unwanted mail before forwarding. The service says it does not read, analyze, or store forwarded message bodies or attachments and keeps delivery metadata; email metadata logs are retained for 90 days. Premium users can add up to five custom domains, send and reply from aliases, and use the REST API and MCP access. The Free plan includes 10 aliases. Premium costs $4 a month. Browser extensions support Chrome, Firefox, and Edge; no mobile apps are listed.