[dikbrouwer]

I do, but only in smaller side projects and I'd love to hear from someone who has experience with both in larger settings. Although they work very differently, the query language (Cypher vs. Datalog) have a very similar feel to them. When I tried them it seemed that Datomic would be the more flexible of the 2 (eg. for use cases where you'd want a bit of relational and a bit of graph support), and that Neo4j you'd end up with PostgreSQL next to Neo4j in many practical applications. I have to say though that the query/visualization UI that Neo4j provides is nice and helps with making sure your data is indeed stored in the way you want.