What are some alternatives?
When comparing Themida and Alienyze, you can also consider the following products
VMProtect - VMProtect Ultimate - All-In-One Solution For Software Licensing And Protection.
UPX - UPX (Ultimate Packer for eXecutables) achieves an excellent compression ratio and offers very fast...
PELock - Software copy protection against reverse engineering with anti-cracking & anti-debugging techniques. Software license key system with time trial options.
ExEinfo PE - Packer, compressor detector / unpack info / internal exe tools.
Enigma Protector - Enigma Protector is designed by the developers of Enigma Virtual Box and more advanced and secure mode of virtualization as compared to the Enigma Virtual Box.
Free UPX - Graphical interface for the UPX packer, UPX 3.91w, UPX 3.92w, UPX 3.93w, UPX 3.94w, Ultimate Packer for eXecutables, EXE packer