"The investment validates that the market is shifting to non-relational operational data stores with MongoDB as the leading solution," said Dwight Merriman, CEO of 10gen. "Thanks to the MongoDB community, the project is very successful and we look forward to continuing work on making it a great open source solution for hard data storage problems."

With over 90,000 downloads per month, MongoDB is the leading NoSQL technology for building agile applications. Large-scale deployments at companies like bit.ly, foursquare, IGN, and SourceForge highlight MongoDB's strength as an operational data store for the web.

"MongoDB is in the sweet spot of performance and features," said Chandra Patni of IGN. "Its rich data types, querying, and in place updates reduced development time to minutes from days for modeling rich domain objects."

Both startups and Fortune 100 companies are deploying the technology for a broad set of use cases that includes content management, event logging, web data storage, and real time analytics. 10gen provides commercial support, training, and other services for MongoDB.

"Unabated data growth clearly demonstrates the need for database innovation and NoSQL solutions," said Roelof Botha, Partner from Sequoia Capital. "Users are effusive about improvements in agility and scalability afforded by MongoDB, and 10gen is well positioned to deliver elasticity of data as a complement to private and public cloud computing applications."

This week 10gen will be hosting MongoSV at Microsoft Research Silicon Valley. MongoSV will be the highlight of a series of conferences dedicated to application development with MongoDB. Several key customers and early adopters will present their implementations of MongoDB. Over 500 engineers, CTOs, and database architects are registered for the sold-out event.