The best open source alternative to TrueCrypt is VeraCrypt. If that doesn't suit you, our users have ranked more than 100 alternatives to TrueCrypt and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to TrueCrypt are Cryptomator, Picocrypt, LUKS and File Lock PEA.
Ensure your data's security by encrypting entire partitions, storage devices, or system drives with VeraCrypt. Benefit from transparent and automatic real-time encryption, hardware acceleration on modern processors, and robust security algorithms that are resistant to brute-force attacks.
Cryptomator provides transparent, client-side encryption for your cloud. Protect your documents from unauthorized access. Cryptomator is free and open source software, so you can rest assured there are no backdoors.
Picocrypt is a very small (hence Pico), very simple, yet very secure encryption tool that you can use to protect your files. It's designed to be the go-to tool for encryption, with a focus on security, simplicity, and reliability.
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.
DroidFS is an alternative way to use encrypted overlay filesystems on Android that uses its own internal file explorer instead of mounting virtual volumes. It currently only works with gocryptfs but support for CryFS could be added in the future.
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...
With EDS (Encrypted Data Store) you can store your files in the encrypted container to prevent unauthorized access to sensitive information.
FreeOTFE is a free, open source, "on-the-fly" (OTFE) disk encryption program for PCs running MS Windows and Windows Mobile PDAs (FreeOTFE4PDA).
Picocrypt NG (new generation) is a very small (hence Pico), very simple, yet very secure encryption tool that you can use to protect your files. It's designed to be the go-to tool for file encryption, with a focus on security, simplicity, and reliability.
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TrueCrypt was discontinued in mysterious circumstances. The code was taken forward by VeraCrypt. It is open source and some security vulnerabilities have been fixed since the TrueCrypt days. It's a great app for creating encrypted containers or encrypting whole drives. Backwards compatible with TrueCrypt. Truly excellent software.