In the context of alliances prior to World War I, the two countries that did not ally with each other were Russia and Austria-Hungary.
1. Russia had an alliance with France known as the Franco-Russian Alliance.
2. Austria-Hungary was part of the Triple Alliance with Germany and Italy, which was later known as the Central Powers during World War I.
Therefore, the correct answer to the question is Russia and Austria-Hungary. They did not ally with each other prior to World War I, as they were part of different alliances that would later become opposing sides during the war.
