Alternatives to Challenger for all platforms with any license

  • 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...

    Free Open Source Mac Windows Linux

    TrueCrypt icon
    • Discontinued Currently unmaintained. Last version, TrueCrypt 7.1a, is still available for download and development has continued via the forks https://alternativeto.net/software/veracrypt/ and https://alternativeto.net/software/ciphershed/. "The development of TrueCrypt was ended in 5/2014 after Microsoft terminated support of Windows XP. Windows 8/7/Vista and later offer integrated support for encrypted disks and virtual disk images."
  • 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...

    Free Open Source Mac Linux PortableApps.com Xfce OpenPGP

    GnuPG icon
  • 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...

    Free Open Source Mac OS X Linux BSD

    No features added Add a feature

    EncFS icon
    • Warning The author has agreed that EncFS in its current form is dangerous (to security) for several reasons. Wikipedia has a brief summary: https://en.wikipedia.org/wiki/EncFS#General_Security_Concerns The actual audit, which the author participated in, is here: https://defuse.ca/audits/encfs.htm
  • Easy File Locker

    Easy File Locker is a pretty small file at 224KB and will do exactly what it says. It will let you protect a file or folder from being seen or accessed by anyone on your...

    Free Windows

    Easy File Locker icon
  • 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...

    Free Open Source Mac OS X GnuPG

    No features added Add a feature

    GPG Suite icon
  • LibreCrypt

    LibreCrypt (formerly DoxBox) is an open-source disk encryption for Windows and the successor of FreeOTFE Change of name to 'LibreCrypt' in version 6.2 ...

    Free Open Source Windows

    No features added Add a feature

    LibreCrypt icon
  • Cryptkeeper

    Cryptkeeper is a Linux system tray applet that manages EncFS encrypted folders.

    Free Open Source Linux

    No features added Add a feature

  • 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...

    Free Mac OS X Windows

    Encrypto icon

Platforms

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