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SimpleLogin vs Forward Email: catalog facts
SimpleLogin	Forward Email
Freemium Free tier available, with paid plans for more aliases and features; owned by Proton.	Freemium Free tier available for custom domain forwarding, open source.
Android, Web, Browser extension	Web
Open source alias generation with the backing of Proton Aliases can be disabled individually to stop spam without changing your real address	Unlimited aliases and generous free storage for custom domain forwarding Fully open source rather than a closed proprietary forwarder
Best features and higher alias limits require a paid plan Now tied into the Proton ecosystem after the acquisition	Requires owning and configuring a custom domain to get the full benefit Advanced use cases may require comfort with DNS configuration
Web application, Browser extension	Web application
Open source	Open 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.