Apps similar to Firefox Relay include addy.io, which is open source with a free version. Other options are AliasVault, MailDrop, Guerrilla Mail and TemporaryMail. You're spoiled for choice with Disposable Email Services like Firefox Relay: we list more than 100 alternatives for the web, Android, iPhone, Windows and self-hosting.
Blazing Fast Temp Mail Service: Why FreeCustom.Email Delivers Unbeatable Loading Speed on All Devices.
India
KeptlerMasking allows you to generate email masks, shielding your real address, blocking spam, and ensuring privacy. These masks discreetly forward messages, safeguarding your confidential email identity.
Free Throwaway Email Address service. 250Kb message size. If you put a password on your account you need to log in.
It’s quicker to view your messages when no password is required. Most people only need their account for a few minutes, they don’t need a password or care who can.
Minute Mailbox is a temporary email service that allows you to generate email IDs and receive emails right the way. You can get your temporary addresses for free with a click of the mouse and let them self-destruct after 24 hours.
SegundoEmail lets you instantly create disposable mail boxes that hold messages for up to a day. Several browser extensions and API let you take the most of this fast and reliable service.
Temporary disposable e-mail service to beat spam. Avoid spam with a free secure e-mail address.
United States
The TempMailAddress protects your primary mailbox. TempMailAddress.com is a new, comprehensive temporary email address platform.
Protect your personal email address from spam with gigainbox.com - the disposable temporary email service that you love
TrashEmail is hosted Telegram bot that can save your private email address by offering disposable email address. It can create, manage, disposable email address and link them with your telegram bot chat.
Stop giving out your real email address. The Inboxes App browser extension gives you temporary email addresses you can delete, saving your inbox from junk.
Poistaa is a free service that allows automatically discarding your emails for instant. Emails will be received and deleted automatically.
Emailsilo is a free throwaway e-mail address used for those times when you don't want to give out your real address. Avoid SPAM and data leaks.
