eHarmony is an online dating website launched in 2000. eHarmony is based in Los Angeles, California, and owned by Nucom ecommerce, a joint venture of German mass media company ProSiebenSat.1 Media and American private equity firm General Atlantic.

Online dating, also known as internet dating, virtual dating, or mobile app dating, is a method used by people with a goal of searching for and interacting with potential romantic or sexual partners, via the internet. An online dating service is a company that promotes and provides specific mechanisms for the practice of online dating, generally in the form of dedicated websites or software applications accessible on personal computers or mobile devices connected to the internet. A wide variety of unmoderated matchmaking services, most of which are profile-based with various communication functionalities, is offered by such companies.