The solution lies in understanding the major differences between these two systems and how they impact data handling, event management, and overall system design. In this guide, we will break down event sourcing and event-driven architecture, explaining what they are, how they work, and how they differ from each other.

Event-Driven Architectures and Event Sourcing are two different things; the former is a communication pattern while the latter is a persistent state pattern. The only thing these two things have in common is events. However, the fact that they are both centred around events makes them both appealing to people building systems based on events.

To be clear, Event Sourcing is about using events to represent state. In Event Driven Architecture, events are used to communicate with other service boundaries. Event Sourcing Event Sourcing is a different approach to storing data. Instead of storing the current state, you’re instead going to be storing events.

Event-sourcing (as explained in first answer) is a technique all about constructing the state of a record from events store where events are persisted sequentially whereas Event-driven is a communication style in which a service does not expect a response to message it published.