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Erine.email vs 33Mail: catalog facts
Erine.email	33Mail
Free Free and open source.	Free Free for unlimited aliases on the 33mail subdomain.
Web	Web
Free and open source alternative to paid alias services Works with an existing inbox rather than requiring a new mailbox	Unlimited free aliases on the service's subdomain Simple to create a new alias on demand for any signup
Smaller, less established project than larger alias services Limited information available on feature depth and reliability track record	Aliases live on 33mail's shared subdomain rather than a custom domain on the free tier Long-running service with a dated interface compared to newer alternatives
Web application	Web application
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.