Are different Azure services mostly in contact with each other?

Azure services are designed to be loosely coupled and communicate through well‑defined interfaces such as REST APIs, SDKs, Azure Service Bus, Event Grid, or Azure Functions. For example, an Azure Function can trigger on a Service Bus message, or an Azure Logic App can call a REST endpoint of an Azure API Management service. This decoupling allows services to scale independently and enables patterns like microservices, event‑driven architecture, and serverless workflows. In practice, you often expose services via HTTP endpoints or message queues, and use Azure’s built‑in authentication (Managed Identities, SAS tokens) to secure the communication.