33Mail vs Shroud.email

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.

Shroud.email creates email aliases that forward incoming messages to your real inbox, keeping the real address private. It removes tracking pixels from forwarded mail and proxies email images through its servers. You can delete or disable aliases and block individual senders, and the service says it works with all email providers, including Gmail and Proton Mail. Paid users can attach custom domains, configure catch-all aliases, and recreate those addresses elsewhere if they leave. The API manages aliases and discovers custom domains with bearer-token authorization. The project is open source under AGPL v3 and includes a Docker Compose deployment for self-hosting. Self-hosting requires a public server with ports 25, 80, and 443 open, plus keys for S3-compatible storage. Detected spam remains viewable in the web portal for seven days. The hosted service is EU-hosted on renewable energy. The Free plan costs nothing and includes five aliases and tracker blocking; the paid plan has no listed price and renews annually.