Coursera is a marketplace built around accredited education from universities and major companies, offering certificates, specialisations and full degrees. Its catalogue comes from several hundred institutional partners rather than individual creators.
It is included here because readers expect to see it, but it answers a different question from the rest of this table. There is no self-serve way to publish: partnership is applied for and negotiated, and no instructor revenue share is published, which is why it carries no price.
Coursera was founded in 2012 and is headquartered in Mountain View, United States.