Deepstream is a high-performance realtime server that synchronizes data between servers, browsers, smartphones, and IoT devices within milliseconds. It stores and synchronizes schemaless JSON documents called "records" between clients and backend processes, allowing endpoints to create, read, partially or fully update and delete records as well as arrange them in lists and collections to create complex relational data-structures. It also provides publish/subscribe functionality for ephemeral messaging and load balanced remote procedure calls (RPC/RMI) for request/response workflows. Deepstream is available as an open source server, a fully managed cloud offering, or as a self-orchestrating private cloud or on-premise cluster for enterprises.