Angiogenesis is one of the key rate limiting factors in tumor growth. The concept of antiangiogenic therapy was first considered over 50 years ago but the first antiangiogenic therapy for breast cancer was only given regulatory status in 2008. A large number, and diverse range, of therapeutic agents are, however, currently in development for use in breast cancer with results suggesting great promise. Some of these agents directly target molecules in the angiogenic cascade and others have secondary antiangiogenic effects as a consequence of inhibition of target molecules that are not directly involved in the angiogenic process. Here some of the agents currently under development are discussed together with other, currently hypothetical, targets.