Build your own or use an out-of-the-box event sourcing library. That's the question I tackle in part seven of my event sourcing series:
https://www.planetgeek.ch/2026/05/26/event-sourcing-why-we-built-our-own-library/
I'll look back at our architectural decisions when we started over 10 years ago and how we likely would decide in today's landscape.

Event Sourcing: Why we built our own “library”
During my series on event sourcing, I got a question a couple of times: "Why don't you use an event sourcing library? Why have you built your own kind of library?" So part seven is about the trade-offs of using out-of-the-box libraries versus building your own - even today. When we started When we started...





