RethinkDB is credible (perhaps major) competitor for MongoDB valuated at $1.2B. So this founding seems very reasonable. There is actually real shortage of inno

RethinkDB is credible (perhaps major) competitor for MongoDB valuated at $1.2B. So this founding seems very reasonable. There is actually real shortage of innovative databases. For example Redis was released just a few years ago, but all ingredients were here for decades. It takes years to develop, quality demands are very high and takes long time to build reputation to get enterprise users. Also experienced people are scarce and get 'hired away' by big guys. Very hard field for start-up.