Does someone know about graph databases like neo4j?

It seems to be a great tool to model a Web of Trust.

Or here, the visualization tools :

Does someone have skills ?

Not me.

What type of database is used currently then?
And how is it better than let’s say… OrientDB?

Currently, members (nodes) and certifications (edges) are stored in the blockchain.

My question is : Is it interesting to dump the data from the blockchain in a graph oriented DB ?
(in order to do graph analysis, visualization or else).

It’s an open question, as I have no skills about non conventionnal DB (NoSQL).