Maurício Maia put together a price comparison for MongoDB hosting:
Additionally there’s also the matrix of MongoDB hosting features. While far from being exhaustive, these MongoDB hosting matrix are meant to give you an idea of what options are out there.
Unfortunately, they don’t include MongoDB hosting on:
Each of these offer a free plan, but the pricing will depend on many factors. On the other hand, they also offer application hosting and that basically means collocating your app and data which is better than putting the whole internet between the two.
Original title and link: MongoDB Hosting Matrix ( ©myNoSQL)