There currently are no nationwide directories, and not every state has one.  The problem is that once you try to publish nationwide.....the amount of time and research needed causes the amount of comprehensiveness to be lost.  The reason we publish only in California is because (1) we are based in California (2) most of the high tech and bioscience companies that people are looking to research or contact are located in California and (3) because we are able to provide literally everything you could possibly want to know about each of these companies because our focus is only statewide.