https://elaan.io/blog.html Notes on notification infrastructure: multi-tenant branding, real-time delivery, preferences, and the parts of a delivery system nobody scopes up front. en Sun, 02 Aug 2026 00:00:00 +0000 https://elaan.io/blog/build-vs-buy-notification-infrastructure.html https://elaan.io/blog/build-vs-buy-notification-infrastructure.html Sun, 02 Aug 2026 00:00:00 +0000 Sending one email takes two lines of code. The system around it (per-tenant branding, preferences, retries, a real-time inbox that doesn't poll) takes months. When to build it, and when to buy it. notification infrastructure build vs buy multi-tenant branding server-sent events in-app inbox B2B2C