I wonder if the companies who make these products use their own product on their employees? I can't imagine them not (hard to sell a product you don't even use)

I wonder if the companies who make these products use their own product on their employees? I can't imagine them not (hard to sell a product you don't even use), but on the otherhand, it would be especially insulting as an employee to be developing the very tool that is being used to spy on you.