http://www.b2bcfo.com/part-time-cfo/tatum-vs-b2b-cfo/ There are many differences between Tatum and B2B CFO®. A few of the differences are listed below. The major difference is that B2B CFO® serves a different market than Tatum. Tatum's market is companies with sales of $200 million to several billion. B2B CFO® concentrates on companies with sales up to $75 million, which is the largest market in the United States. For more information about B2BCFO please contact us at 1-800-275-7123