Firefox Relay
8.0#1 in mobile browser softwareFree planFree planAndroidiOSWebAPI
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Firefox Relay suits people who want to use masked contact details for sign-ups and forward messages or calls without sharing their real details. Its dashboard and browser extension offer ways to manage masks, while phone masks and anonymous email replies are available in paid options.
YeyMail suits people who want many signup addresses while keeping one familiar inbox. It is useful for custom domains, alias replies, and browser-based address creation.