UPX (Ultimate Packer for eXecutables) achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks for most of the formats supported, because of in-place decompression.
Alienyze Alternatives
Alienyze is described as 'Software packer and protection solution for native Windows 32-bit executable files. Alienyze allows developers to easily protect their software aginest cracking and reverse engineering, while also providing additional features such as executable compression' and is an app. There are nine alternatives to Alienyze for Windows, Linux and Mac. The best Alienyze alternative is UPX, which is both free and Open Source. Other great apps like Alienyze are VMProtect, Themida, PELock and ASPack.
Alternatives list
- 12 UPX alternatives
- 13 VMProtect alternatives
VMProtect Ultimate - All-In-One Solution For Software Licensing And Protection. VMProtect protects code by executing it on a virtual machine with non-standard architecture that makes it extremely difficult to analyze and crack the software.
- 13 Themida alternatives
Advanced Windows software protection system, developed for software developers who wish to protect their applications against advanced reverse engineering and software cracking.
Cost / License
- Paid
- Proprietary
Platforms
- Windows
- 12 PELock alternatives
Software copy protection against reverse engineering with anti-cracking & anti-debugging techniques. Software license key system with time trial options.
Cost / License
- Paid
- Proprietary
Platforms
- Windows


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ASPack is an advanced solution created to provide Win32 EXE file packing and to protect them against non-professional reverse engineering.
Cost / License
- Paid
- Proprietary
Platforms
- Windows


WWPack32 - Windows executable files compressor and protector. Compressed exe and dll files run exactly as before!. This program squeezes exe files and protects Win32 applications from cracking.

A library for some loosely related Microsoft compression formats, CAB, CHM, HLP, LIT, KWAJ and SZDD.
Cost / License
- Free
- Open Source (GPL-2.0)
Platforms
- Linux
- Windows
- Mac
Crinkler is an executable file compressor (or rather, a compressing linker) for Windows specifically targeted towards executables with a size of just a few kilobytes. As of 2020, it is the most widely used tool for compressing 1k/4k/8k intros.
PECompact is an advanced Windows executable compressor for use by software developers and vendors. Executable packers compress executable modules (EXE, DLL, etc..) so that their physical size is considerably smaller.
Cost / License
- Paid
- Proprietary
Platforms
- Windows


















