hCaptcha - Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.

Mailinator - Any Inbox. Any Time.

reCAPTCHA - reCAPTCHA is a free security service that protects your websites from spam and abuse.

Guerrilla Mail - Guerrilla Mail is a web-based app that provides a disposable and anonymous email address. Users of the service are not required to set up an account in order to send or receive emails.

GeeTest CAPTCHA - GeeTest protects your websites, mobile Apps and APIs from bot threats.

Fake Mail Generator - Fake Mail Generator is the provider of free and temporary email addresses that you can use just like original one.