[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]
Cost / License
- Free
- Proprietary
Application type
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux




RealCrypt is described as 'The realcrypt application in the RPM Fusion repo is an encryption application based on truecrypt, freely available at http://www.truecrypt.org/. It differs from truecrypt in only the following ways:' and is a Disk Encryption tool. There are more than 25 alternatives to RealCrypt for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best RealCrypt alternative is TrueCrypt, which is free. Other great apps like RealCrypt are LUKS, Windows BitLocker, EDS (Encrypted Data Store) and Tella.
[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]




LUKS is the standard for Linux hard disk encryption. By providing a standard on-disk-format, it does not only facilitate compatibility among distributions, but also provides secure management of multiple user passwords.

BitLocker Drive Encryption is a data protection feature that integrates with the operating system and addresses the threats of data theft or exposure from lost, stolen, or inappropriately decommissioned computers.




With EDS (Encrypted Data Store) you can store your files in the encrypted container to prevent unauthorized access to sensitive information.




Tella is a mobile app designed to protect human rights defenders, advocates, and journalists by encrypting and hiding their sensitive data and safely uploading it to their organization's server.




FreeOTFE is a free, open source, "on-the-fly" (OTFE) disk encryption program for PCs running MS Windows and Windows Mobile PDAs (FreeOTFE4PDA).




DiskCryptor is a free and open-source utility that offers encryption of all disk partitions, including the system partition. Originally conceived as a replacement for DriveCrypt Plus Pack and PGP Whole Disk Encryption (WDE), the project aims to create the best product in its...




CipherShed is a program that can be used to create encrypted files or encrypt entire drives (including USB flash drives and external HDDs).

EncFS provides an encrypted filesystem in user-space. It runs without any special permissions and uses the FUSE library and Linux kernel module to provide the filesystem interface. You can find links to source and binary releases below.
LibreCrypt (formerly DoxBox) is an open-source disk encryption for Windows and the successor of FreeOTFE

LUKS Manager provides on-the-fly encryption (AES by default) to virtual folders on Android devices.



