[moondowner]

OrientDB is more similar to Neo4j, http://www.orientechnologies.com/orientdb-vs-neo4j/ and some folks think of it as a decent alternative to it https://medium.com/@KevinHoffman/first-exposure-to-orientdb-...

I didn't have any performance issues with OrientDB, but it's worth noting that I worked with relatively small datasets (e.g. graphs with ~1000 edges).

Titan, given that it runs on HBase or Cassandra, is on a whole different level compared to these two graph DBs. If you're working on a small app which needs an ebedded graph DB, you'll definitely not use Titan.

[okram]

There are some compelling reasons to use Titan at smaller scales:

http://thinkaurelius.com/2013/11/24/boutique-graph-data-with... (good in-memory performance -- like Neo4j)

http://thinkaurelius.com/2013/03/30/titan-server-from-a-sing... (if you do grow, its easy to add more machine)