SOMEONE JUST OPEN SOURCED A WHATSAPP API THAT COSTS NOTHING PER MESSAGE AND RUNS ENTIRELY ON YOUR OWN SERVER. The WhatsApp Business API charges per message. Every message you send. Every message you receive. A fee on top of a fee on top of a subscription. OpenWA eliminates all of it. One Docker command. The whole thing is live on your machine. Zero per-message fees. Zero vendor lock-in. Zero hidden paywalls. Here is what the pluggable architecture actually means. You swap the entire backend through config alone. Never touch a line of application code. SQLite for zero-config local development. PostgreSQL when you go to production. Flip one setting. Done. Local storage when you are starting out. S3 or MinIO when you need to scale. Flip one setting. Done. Memory cache for simple setups. Redis when speed matters. Flip one setting. Done. Here is everything you get out of the box: Full REST API for text, media, reactions, and bulk sends. Multi-session support so you run multiple WhatsApp accounts on one instance simultaneously. Real-time webhooks with HMAC signatures. Groups, Channels, and Labels fully covered. A complete React dashboard for sessions, webhooks, and API keys. API key authentication, rate limiting, CIDR whitelisting, and audit logging built in from day one. The wildest part is the setup time. One Docker command. Dashboard. API. Swagger docs. All running. The businesses currently paying a middleman per message to do exactly this are going to discover this repo eventually. The ones who find it first get 6 months of zero-cost WhatsApp automation before their competitors catch up. 90 stars. MIT License. 100% open source. Bookmark this before you pay next month's WhatsApp API bill. Follow @cyrilXBT for every open source build that makes an expensive tool free the moment it drops.(CyrilXBT)