Zenflow is a medical device company that develops minimally invasive treatments for prostate disease. The company's flagship product is the Zenflow Spring System, which is designed to relieve urinary symptoms caused by benign prostatic hyperplasia (BPH). The Spring System is inserted into the urethra and expands to push aside prostate tissue that is obstructing the flow of urine. Zenflow was founded in 2014 and is headquartered in San Francisco, California.