Encrypto is described as 'lets you encrypt files before sending them to friends or coworkers. Just drop a file into Encrypto, set a password, and then send it however you normally would — but this time with added security. It’s free for both Mac and Windows' and is an app in the Security & Privacy category. There are more than 50 alternatives to Encrypto for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is Cryptomator, which is both free and Open Source. Other great apps like Encrypto are TrueCrypt (Free, Open Source), GnuPG (Free, Open Source), Windows BitLocker (Paid) and AES Crypt (Free, Open Source).