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Firefox RelayGuerrilla Mail
Freemium

Free tier with a limited number of masks, paid plan for unlimited masks and a custom…

 Freemium

Disposable addresses are free; using your own domain costs 9.99 USD per year.

Web, Browser extension Web
  • Backed by Mozilla, a long-standing name in browser privacy
  • Simple mask creation directly from the browser
  • No signup; address is ready immediately
  • Choice of several domains
  • Free tier limits the number of masks available
  • Deeper integration is tied to the Firefox browser ecosystem
  • No encryption; inboxes are not private
  • Many sites block its domains
Web application, Browser extension Web application
Closed source Closed source
License not stated License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Needs internet

Checked September 22, 2026

Checked September 23, 2026

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