Secret Space Encryptor is described as 'Password-vault and text- and file-encryption are integrated in this one app with strong encryption algorithms' and is an app in the Security & Privacy category. There are more than 10 alternatives to Secret Space Encryptor for a variety of platforms, including Windows, Mac, Android, iPhone and Linux. The best alternative is AES Crypt, which is both free and Open Source. Other great apps like Secret Space Encryptor are Encrypto (Free), Boxcryptor (Freemium), Axcrypt (Freemium) and File Lock PEA (Free, Open Source).
AES Crypt is an advanced file encryption utility that integrates with the Windows shell or runs from the Linux command prompt to provide a simple, yet powerful, tool for encrypting files using the Advanced Encryption Standard (AES).
Encrypto 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.
Password-encryption of files and folders. The program is written in Java and therefore platform-independent and runs on nearly every system without installation, but requires a Java Runtime Environment - that is already installed in most cases.