If my previous post about the graph data structure has you eager to get started, then check out this video with Kirill Gavrylyuk. He talks Azure Cosmos DB and Graphs with Scott, exploring why we need graphs, and what we can be done with graphs on Azure Cosmos DB.
Azure Cosmos DB offers native graph gremlin API support in addition MongoDB, SQL, and others. Graphs in Azure Cosmos DB also enjoy the same global distribution, low latency, limitless throughput, and 99.99% SLAs as other APIs.
For more information, check out: Introduction to Azure Cosmos DB: Graph API