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StartMail vs HEY: catalog facts
StartMail	HEY
Paid Paid subscription with a 7-day free trial.	Paid Paid subscription service.
Web	Web
Unlimited disposable aliases Encrypted mail to recipients without encryption via a password	Screens first-time senders before they reach the inbox Email and calendar from one provider
No free tier beyond the trial Hosted service only	Opinionated workflow that differs from traditional email Hosted service that requires a paid account
Web application, Hosted service	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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