It’s been more than five years since online education got a massive boost when three free online courses, all taught by Stanford professors, launched in October 2011. Each of these courses has had over 100,000 students. Soon after that, Coursera, edX, and Udacity were launched and the media started calling the courses provided by these websites “MOOCs”: Massive Open Online Courses.
Since then more than 700 universities around the world have launched free online courses. By the end of 2016, around 58 million students had signed up for at least one MOOC.
https://www.class-central.com/report/mooc-providers-list/