Challenger is a software for the encoding of files, folders and drives. For the installation and for the execution simple user rights suffice. Ther...

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Challenger alternatives


[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]

tags: Discontinued Portable disk-encryption drive-encryption encrypt-usb-drive
platform: Mac OS X Windows Linux Discontinued


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...

tags: encrypted-email file-encryption security-utilities xfce
platform: Mac OS X Linux Xfce


AxCrypt is a simple file encryption software for Windows. It integrates seamlessly with your workflow to encrypt, decrypt, store, send and work wit...

tags: Portable aes aes-encryption file-encryption multi-language
platform: Mac OS X Windows Android iPhone iPad

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, ...

tags: aes aes-encryption data-encryption encrypt-folder file-encryption
platform: Mac OS X Windows Linux Android iPhone Android Tablet iPad


Podio is an online work platform. Combining hundreds of specialized and flexible work apps with messaging, tasks, reporting, workflow and contact m...

tags: applicant-tracking-system intranet lead-management online-crm project-management
platform: Online Android iPhone

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 acce...

tags: file-lock file-protection folder-protection hide-files hide-folders
platform: Windows

Windows BitLocker

No encryption of dynamic disks, but command-line-encryption! Dynamic disks must be converted to basic disks with EasyUS Partition Master or Partiti...

tags: command-line-encryption command-line-start create-bootable-usb data-protection disk-encryption
platform: Windows


LibreCrypt (formerly DoxBox) is an open-source disk encryption for Windows and the successor of FreeOTFE

tags: disk-encryption file-encryption on-the-fly
platform: Windows

Gnome Encfs Manager

The Gnome Encfs Manager is an easy to use manager and mounter for encfs stashes. It allows you to create encrypted directories, any file that is pl...

tags: crypto cryptography
platform: Linux


EncFS provides an encrypted filesystem in user-space. It runs without any special permissions and uses the FUSE library and Linux kernel module to ...

tags: Warning file-encryption dropbox folder-encryption truecrypt
platform: Mac OS X Linux BSD Warning

GPG Suite

GPG for Mailis an open source plugin for Apple Mail. Encrypt, decrypt, sign and verify mails using OpenPGP with a few simple clicks.

tags: encrypted encrypt-text email-encryption encrypt-message encrypt-emails
platform: Mac OS X


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

tags: cryptography gtk folder-encryption folder-manager
platform: Linux

Jetico BestCrypt

If your computer were ever to be stolen, are you certain that your personal information cannot be discovered? Jetico’s BestCrypt software automatic...

tags: data-encryption data-protection file-encryption
platform: Mac OS X Windows Linux


Secure Any File with AES-256 Encryption

tags: encrypt-pdf encrypted encrypted-file-sharing file-encryption lightweight
platform: Mac OS X Windows


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

tags: Discontinued Portable file-encryption virtual-disk virtual-drive
platform: Windows Windows Mobile Discontinued