OpenWA: A Self-Hosted WhatsApp API Gateway Built for Production
WhatsApp's official API is powerful, but it comes with strings attached: vendor lock-in, per-message pricing, and a closed ecosystem. For developers who want full control over their messaging infrastructure, the alternatives have historically been thin. OpenWA aims to change that. It's a free, open-source, self-hosted WhatsApp API gateway that runs on your own hardware, speaks your language, and doesn't bill you per message.
This isn't a weekend side project. OpenWA is a NestJS 11 application written in TypeScript, with a security posture and testing discipline that suggests serious production intent. Let's look at what makes it interesting.
Two Engines, One Interface
The most distinctive architectural decision in OpenWA is its dual-engine design. It supports two WhatsApp libraries behind a common interface:
