LockBytes is described as 'Easily licence and distribute executables on windows computers from the cloud without having to worry about end users sharing them without your permission'. There are more than 25 alternatives to LockBytes for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is UPX, which is both free and Open Source. Other great apps like LockBytes are ExEinfo PE (Free), Appetize.io (Freemium), FOSSA (Freemium) and Labs64 NetLicensing (Freemium).
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.
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.