Joe Doliner - Engineer at RethinkDB here. RethinkDB is designed for small teams with big data challenges. When you're just starting up a new project ideally you want to just boot your database up and start throwing data at it without worrying about schema. However with other products on the market, most notably Mongo, there are a lot of features that stop working when you get to a large scale. We've been very careful in developing RethinkDB to make sure that small teams who use our product aren't going to need to rewrite code once their dataset starts growing. As coffeemug mentions above we support fully parallelized queries. This means that when your dataset grows you can add more servers to speed up analytic queries. We feel this a valuable feature for small teams.
