Over the years, endophytes have gained tremendous attention due to their ability to produce novel bioactive compounds, such as alkaloids, terpenoids, flavonoids, quinones, and peptides, which exhibit diverse biological properties. The current review emphasizes the significance of endophytic microorganisms in producing novel bioactive compounds with diverse biological activities, including anticancer, antibacterial, antifungal, antioxidant, and immunosuppressant activities. While plant sources are being extensively explored for new chemical entities for therapeutic purposes, endophytic microbes also constitute an important source for drug discovery. This review aims to comprehend the contributions and uses of endophytes as an impending source of drugs against various diseases and for other possible medicinal uses.