Courses: 313 courses in 21 subject areas. Pictured here: a Coursera video.
Focus: Offering the masses access to elite college classes.
Sources for courses: 62 universities in 11 countries.
Backed by: $22 million in venture capital from the likes of Kleiner Perkins and New Enterprise Associates.
Status: For profit.
Leadership: Co-CEOs are co-founders Daphne Koller and Andrew Ng.