Lux or Control Plane: A set of services that powers the Hasura EE Control Plane that allows for user/team management, managing Hasura GraphQL configuration and includes a monitoring plane that ingests Hasura & GraphQL API metrics and makes it available over a UI and an API
GraphQL Engine or Data Plane: The container(s) serving the GraphQL API and in the critical path of every request/response
Hasura CE: The open-source edition of the Hasura GraphQL Engine
Hasura EE: Hasura Enterprise edition that includes a self-hosted control plane
Hasura Cloud: The managed cloud version of Hasura that includes Hasura EE features and runs as a managed service