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Mail.com vs Seznam Email: catalog facts
Mail.com	Seznam Email
Freemium Free accounts with ads; a premium tier is available.	Free Free email accounts.
Web, Browser extension	Web
Choice of 100+ address domains Up to 10 addresses per account	Free addresses on several Czech domains One account covers other Seznam services
Free tier shows sponsored content Proprietary hosted service	Interface and service aimed at Czech speakers Requires a mobile phone number to register
Hosted service, Browser extension	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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