Growing evidence has made it obvious that early intervention in patients with Achilles tendon rupture extensively affects the prognosis. This requires the use of easily accessible imaging modalities such as ultrasound in establishing accurate diagnosis of tendinopathies so that early therapeutic decisions can be made. Ultrasound allows for assessment of tendons in a dynamic real time setting. Physicians can interact with patients and receive feedback regarding the symptomatic area, and assessing the tendon from different angles while under stress. It also offers a faster method to diagnose Achilles tendon rupture and therefore provide early intervention. Furthermore, ultrasound is a safe, non-invasive, and a patient friendly method that has become less expensive, portable, and a faster imaging modality to diagnose tendinopathies. In this paper, we review the application of ultrasound in diagnosing Achilles tendon rupture and comparing it with other imaging modalities, after thoroughly studying the current literature.