Amazon Neptune uses Gremlin
Amazon Neptune is a managed graph database product published by Amazon.com. It is used as a web service and is part of Amazon Web Services (AWS). It was announced on November 29, 2017. Amazon Neptune supports popular graph models property graph and W3C's RDF, and their respective query languages Apache TinkerPop's Gremlin, openCypher, and SPARQL, including other Amazon Web Services products.
Amazon Neptune general availability (GA) was announced on May 30, 2018 and is currently available in 22 AWS regions. Neptune is HIPAA eligible. On December 12, 2018, it was announced that Amazon Neptune was in-scope for Payment Card Industry Data Security Standard, and ISO compliance programs.Features
External support
Amazon Neptune supports the open source Apache TinkerPop Gremlin graph traversal language, openCypher query language for property graphs, and the W3C standard Resource Description Framework's (RDF) SPARQL query language. All three can be used on the same Neptune instance, and allows the user to build queries to navigate highly connected data sets and provides high performance for both graph models. Neptune also uses other AWS product features such as those of Amazon S3, Amazon EC2 and Amazon CloudWatch.