TrueCrypt is an open source software to encrypt volumes of data. It even supports the creation of virtual encrypted volumes which is portable. Developed by TrueCrypt Foundation
License: Open Source
TrueCrypt is a powerful but outdated tool focused on full disk encryption with robust security features, while Cryptomator offers a modern, user-friendly approach to encrypting files specifically for cloud storage. Users seeking a comprehensive encryption tool might prefer TrueCrypt, whereas those looking for ease of use and cloud compatibility may find Cryptomator more suitable.