Dgraph started with the idea that every startup should be able to have the same level of technology as run by big giants. We designed Dgraph from ground-up to allow data sharding, horizontal scalability, consistent replication, and a fast and distributed architecture.
Update (Apr 2018): Dgraph has switched back to Apache 2.0, with a Commons clause restriction. See new post here.
We also dream that graph database would no longer run as a secondary database.