If you are starting a new project, stop. Do not use IonCube. The "better" alternatives for modern PHP are:

When users look for a "better" ionCube decoder, they are usually seeking the following: Higher Accuracy

The search for a "better decoder" is a search for a phantom. The truly better path is better server management, better vendor communication, and ultimately, a preference for open-source software that respects your right to read and modify the code you paid for.