The difference between a government and a corporation is the ability to use violence. A government is just a corporation with a monopoly on violence (police, military, jails...). The structure of how people are organized is more significant. Are we talking about a dictatorship or a functioning democracy? Are we discussing a non-profit or a publicly listed company?
Corporations have a profit motive, governments theoretically may not. Also, read about the history of the East India Company. In no way do corporations abstain from using violence, historically, and at times they have held a du jour monopoly on the use of it.
Governments have murdered over one hundred million people over the last few centuries through war and forced famines. Corporations don't even enter that conversation given the scale difference.
Napoleon's government alone murdered more people than all corporations combined have throughout all of history. And that's a revered historical figure that routinely gets fawning movies made about him, there are obviously worse examples. Mao's government murdered several times more than Napoleon did.
