# blog

## Pages

- [Our first blog post](https://zacx.io/blog/our-first-blog-post/index.md) — Zacx went live in June 2025. What we built in the year since, why customers who left came back, and what we are committing to from here.
- [WhatsApp Business API replies cost money from 1 October 2026](https://zacx.io/blog/whatsapp-business-api-replies-cost-money-from-1-october-2026/index.md) — Service messages sent inside the 24 hour window will be billed at the Utility template rate. What changes, how bots are affected, and how to keep the cost down.