May 2025 Summaries

Outpost is an open-source outbound webhooks and event destinations infrastructure that provides a scalable, reliable way to deliver events to users' infrastructure without needing to build the capability from scratch. It acts as an event relay between backend systems and user-defined event destinations such as webhooks, queues, and event buses, with at-least-once delivery guarantees and full observability. Outpost is self-hostable, open source under the Apache 2.0 license, and compatible with existing event models, making it a solution for SaaS and API platforms that need to push events to customer-defined destinations while maintaining reliability, retry logic, and great developer experience out of the box.

Webhooks are critical pipes that enable software to talk to each other in real-time, powering modern app experiences such as payment successes, order notifications, and build triggers. However, when webhooks fail, it can have significant consequences, including lost revenue, terrible user experiences, and compliance nightmares. A reliable webhook system needs to follow best practices such as verifying event payloads, queuing and retrying failed events, guaranteeing at-least-once processing and idempotency, detecting slow clients, providing visibility, scaling elastically, and using a dedicated solution like Hookdeck Event Gateway. Building a reliable webhook infrastructure from scratch can be challenging and time-consuming, making it more practical to stand on the shoulders of a service built for this problem from day one.