Virtru is described as 'provides digital privacy technology to let you easily share information securely through all major email programs and applications. Virtru puts you in charge of how your digital information is shared' and is an app in the Security & Privacy category. There are eight alternatives to Virtru for a variety of platforms, including Mac, Windows, Android, iPhone and Online / Web-based. The best alternative is ProtonMail, which is both free and Open Source. Other great apps like Virtru are Lockbin (Freemium), Skizzle Email (Freemium, Open Source), DeliverySlip (Paid) and Yambuu Mail (Paid).