[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]
Cost / License
- Free
- Proprietary
Application type
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux




Isylock is described as 'Simple program to lock/hide your folder in windows' and is an app. There are more than 10 alternatives to Isylock for a variety of platforms, including Windows, Android, iPhone, Android Tablet and iPad apps. The best Isylock alternative is TrueCrypt, which is free. Other great apps like Isylock are Axcrypt, Windows BitLocker, Screen Lock Builder and Secure Folder.
[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]




Offers robust file encryption with AES-256 for premium and AES-128 for free users, integrated password manager, intuitive interface, support for cloud storage, multilingual options, offline security, group management tools, and secure file deletion features.




BitLocker Drive Encryption is a data protection feature that integrates with the operating system and addresses the threats of data theft or exposure from lost, stolen, or inappropriately decommissioned computers.




This Windows screen lock builder creates a portable screen locker (.exe) with your own custom message and password protection.




Samsung Secure Folder lets you put to use the power of defence-grade Samsung Knox security platform to protect your files with a private, encrypted space on your phone. Apps and data moved to Secure Folder are sandboxed separately on the device and gain an additional layer of...




Delivers AES 256-bit encryption, instant password-protected file and folder locking, file hiding, shredding, online backup, USB drive security, audit trail, and stealth mode features, supporting documents, videos, images, and wallet details across drives.

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

Lightweight Windows software enabling batch locking and unlocking of multiple local folders to prevent unauthorized access, reading, or deletion; folders become inaccessible from File Explorer, command line, or network shares, ensuring privacy and security for user data.




Safe space is an app that creates a separate place on your android device to store valuable files. This storage location is not visible to other apps and is encrypted by the system by default.




Fast and simple encryption / folder locking tool.
Features:

CyberSafe Top Secret is an information security program that uses modern encryption algorithms (RSA, AES, BlowFish, etc.).




Kakasoft Lockdir is an excellent folder security solution for password protecting folders. It offers strong security strength in folder protection to help you to avoid data leakage and data breach and to resist attacks from unknown viruses or espionage.



