20minutemail! is described as 'free anti-spam service providing a anonymous temporary inbox' and is an website in the Office & Productivity category. There are more than 50 alternatives to 20minutemail!, not only websites but also apps for a variety of platforms, including Windows, Linux, Firefox and Mac. The best alternative is MailDrop, which is both free and Open Source. Other great sites and apps similar to 20minutemail! are Spamgourmet (Free, Open Source), 10 Minute Mail (Free), Mailinator (Freemium) and Burner Mail (Freemium).