If you check the quick review of existing graph databases and the NoSQL graph databases matrix you’ll notice that most of these came under either an AGPL license or a commercial one.
The game changed radically when Neo4j became available also under a GPL license. And now, Sones has changed the license of their GraphDB connectors to LGPL.
I’m no lawyer but I think this means you can use Sones GraphDB without having to open source your product even if commercial. And because the way you interact with Sones GraphDB is through its connectors it doesn’t matter anymore what the core graph database license is.
Original title and link: Sones GraphDB Changes License for Libraries (NoSQL database©myNoSQL)