Connect to Spanner Before you begin… To connect to Spanner, you need: A Google Cloud Spanner account A Spanner database and Spanner Graph property graph database based on it. NOTE You can start with Spanner demo data available for free trial. Connection Options GraphXR Explorer provides a one-stop connection from the Google Cloud Marketplace to to a single project and a limited amount of data held in a Spanner or Spanner Graph database. GraphXR Enterprise provides full GraphXR collaborative multi-user access to unlimited projects.