Bezos said that America's success comes from "freedom in the economic realm and everywhere else." He also wrote that the viewpoints of markets and liberties are "underserved in the current market of ideas and news opinion. I'm excited for us together to fill that void."
Wednesday's announcement also led a key figure at the Washington Post, chief economics reporter Jeff Stein, to threaten his resignation.
"Massive encroachment by Jeff Bezos into The Washington Post's opinion section today - makes clear dissenting views will not be published or tolerated there," Stein posted on X.
"I still have not felt encroachment on my journalism on the news side of coverage, but if Bezos tries interfering with the news side I will be quitting immediately and letting you know."