For your consideration. Attached list of Soviet spies in the U.S. vs Nazi spies (which only include the failed, Operation Pastorius where Germans were landed by submarine on U.S. soil—only to be immediately betrayed by one of their own. So, essentially zero).

Soviet spies do not include the network of domestic communists and their sympathizers who were resources for the professionals.

Source:

https://en.wikipedia.org/wiki/Category:American_spies_for_the_Soviet_Union

https://en.wikipedia.org/wiki/Operation_Pastorius