In which cases WordPress is not suitable for a website?

[spobitsseo]

In which cases WordPress is not suitable for a website?

[dennis123]

Following are some situations when WordPress is not recommended.

If the client is working on non-CMS based project.
For complex and innovative e-commerce sites.
Sites which require custom scripting solutions.

[farazz]

I think wordpress is not suitable if you want to make a more secure sites with protective data which you don't want to be hacked then wordpress is less secure than others.