Themida is described as 'Advanced Windows software protection system, developed for software developers who wish to protect their applications against advanced reverse engineering and software cracking' and is an app. There are more than 10 alternatives to Themida for a variety of platforms, including Windows, Linux, Mac, Web-based and PortableApps.com apps. The best Themida alternative is Appetize.io, which is free. Other great apps like Themida are UPX, VMProtect, FUPX and PELock.
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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.
Some users think UPX is a great Themida alternative, some don't.
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.
Graphical interface for the UPX packer which offers easy access to all documented and undocumented UPX parameters without the need for command line usage.
Software copy protection against reverse engineering with anti-cracking & anti-debugging techniques. Software license key system with time trial options.
WinLicense combines the same protection-level as Themida with the power of advanced license control, offering the most powerful and flexible technology that allows developers to securely distribute trial and registered versions of their applications.
ASPack is an advanced solution created to provide Win32 EXE file packing and to protect them against non-professional reverse engineering.
kkrunchy is a small exe packer primarily meant for 64k intros. It's relatively useless for anything else actually, because the depacker was relatively slow in older releases (about 1-2MB per second on my machine) and is dog slow in the newest version (about 90-120k per...
Alienyze is a 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...
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.
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.
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UPX is a packer, not a protector