Neo4j is licensed as GPLv3 unless you want the enterprise features (replication). I've run the non-enterprise version in production and it was working fine for

Neo4j is licensed as GPLv3 unless you want the enterprise features (replication). I've run the non-enterprise version in production and it was working fine for a limited workload. Replication would have been nice at some scales but it wasn't the reads that were the issue anyway, it was the writes which replication wouldn't help anyway. RedisGraph is licensed under their weird license but as far as I can tell you just can't expose the RedisGraph API directly to your customers. Building an API on top of it that adds some abstractions should be fine (think a social network powered by the extension). I could be wrong about that though. Are you actually doing graph work in Postgres? I learned about recursive CTE queries once upon a time and that was what prompted adoption of Neo4j. (I'm not a lawyer and don't take legal advice from the internet)