About HookSync

Every platform that processes transactions, fulfills orders, or triggers user actions eventually needs to send webhooks. And every team that builds webhooks from scratch spends weeks on the same problems: retry queues, exponential backoff, signature verification, delivery logs, and a portal for customers to manage their endpoints.

We built HookSync because that work is mostly identical across companies, and none of it is your core product. The time you spend maintaining a webhook dispatcher is time you're not spending on what actually differentiates your platform.

There are existing solutions — Svix, Hookdeck — but they're expensive at scale and your data moves through their infrastructure. HookSync gives you the same capability, either fully managed or self-hosted on your own servers.

The core of HookSync — the ingest API and the delivery worker — is written in Rust. This isn't a choice for its own sake.

Webhook delivery is fundamentally a high-throughput, low-latency queue problem. A single-node HookSync instance can handle thousands of events per second without the JVM warmup, garbage collection pauses, or 512MB base memory of a Node.js or Java service. That matters when you're running this on $20/month hardware instead of a $400 EC2 instance.

Rust's ownership model also eliminates an entire class of memory safety bugs that have historically caused production incidents in C/C++ services of similar performance. No buffer overflows, no use-after-free, no data races — caught at compile time.