How does Clean Architecture differ from DDD?

Clean Architecture is an architectural style that divides the system into layers with clear dependencies: external interfaces, applications, domain, and infrastructure. The main idea is that dependencies should flow inward, towards the business logic, to make the code independent of frameworks and UI.

DDD (Domain-Driven Design) is an approach to development that focuses on a deep understanding of the subject area and modeling business logic using domain concepts, aggregates, entities, and services.

Differences:

• Clean Architecture describes the structure and organization of the code.
• DDD is a methodology for designing the domain model.

They are often used together: DDD helps shape the domain model, and Clean Architecture organizes the code around this model.