The Best 68 Challenger Alternatives

  • TrueCrypt icon

    TrueCrypt

    [TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.] TrueCrypt is a disk encryption software for Windows Vista/XP, Mac OS X, and Linux.

    Free Open Source Mac OS X Windows Linux

  • GnuPG icon

    GnuPG

    GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories.

    Free Open Source Mac OS X Linux Xfce OpenPGP

  • AES Crypt

    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).

    Free Open Source Mac OS X Windows Linux Android iPhone Android Tablet iPad

  • EncFS

    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.

    Free Open Source Mac OS X Linux BSD

  • FreeOTFE

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

    Free Open Source Windows Windows Mobile

  • My Lockbox

    My Lockbox is a security software enabling you to password protect any folder on your computer. The protected folder is hidden from any user and application of your system, including Administrator and System itself.

    Freemium Windows

  • LibreCrypt

    LibreCrypt (formerly DoxBox) is an open-source disk encryption for Windows and the successor of FreeOTFE Change of name to 'LibreCrypt' in version 6.

    Free Open Source Windows

  • Jetico BestCrypt

    If your computer were ever to be stolen, are you certain that your personal information cannot be discovered? Jetico’s BestCrypt software automatically encrypts your files so that nobody can read the data unless they have the right...

    Commercial Mac OS X Windows Linux

  • eCryptfs

    The enterprise cryptographic filesystem for Linux

    Free Open Source Linux

  • GPG Suite

    gpg for mail is an open source plugin for apple mail. encrypt, decrypt, sign and verify mails using openpgp with a few simple clicks. gpg keychain is an open source application for mac os x.

    Free Open Source Mac OS X GnuPG

  • DCrypt

    DCrypt is an encryption and decryption tool that combines in a smart way multiple algorithms.

    Free Open Source Linux

  • SecurStick

    SecurStick is a free portable application that lets you carry encrypted files on your USB drive. You can use the drive on any computer to access and modify those files WITHOUT needing any administrator privileges.

    Free Mac OS X Windows Linux

  • ProxyCrypt

    ProxyCrypt is a command line tool that creates encrypted volumes within a file or a hard drive.

    Free Open Source Windows ImDisk Virtual Disk Driver

  • Encrypto

    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.

    Free Mac OS X Windows

  • dragncrypt ultra

    Drag'n'Crypt ULTRA is a small, coding program assistance whose you confidential data which can be served very simply against the access of unauthorized ones protect can.

    Free Windows