Why we built our own webhook infrastructure instead of using a third party

Every company eventually faces the build vs. buy decision. When it came to webhook infrastructure, we evaluated every major third-party provider and ultimately decided to build our own. Here's why.

Our requirements were demanding: guaranteed delivery with exactly-once semantics, sub-second latency, full observability into every webhook attempt, and the ability to replay events from any point in time. No third-party solution could meet all of these requirements at our scale and price point.

What we built is now one of the core apps on the anielak.net platform — the Webhook Inbox — and it handles billions of deliveries per month with 99.99% uptime.