Connecting GraphXR to an External Database You can connect any GraphXR project to the following external relational or graph data sources for property graph visualization and analytics in a collaborative workspace, with no need to replicate or move data: Neo4j Puppygraph Memgraph Kuzu Oracle Spanner. Use GraphXR Explorer on the GCP Marketplace to connect to a Spanner Graph or Spanner database, build and run graph queries, and explore a visual graph. BigQuery. Use GraphXR Explorer on the GCP Marketplace to connect to BigQuery data sources, model a graph directly in GraphXR, and explore a visual graph.