10gen started developing a cloud computing stack in 2007 and soon realized that the most important innovation was centered around the document oriented database that they built to power it, MongoDB. MongoDB was initially released on August 27th, 2009.

Version 1 of MongoDB was pretty basic in terms of features, authorization, and ACID guarantees and made up for these shortcomings with performance and flexibility.

In the following sections, we can see the major features along with the version number with which they were introduced.