How I Built WhatsApp Bots That Handle 1000+ Conversations for Small Businesses

Over the past 3 years, I've built custom WhatsApp bots for 50+ small businesses in Israel. These bots handle thousands of conversations monthly — booking appointments, qualifying leads, answering FAQs, and even processing orders. Here's what I've learned. Why WhatsApp Bots? WhatsApp has 2 billion+ users worldwide and is the #1 messaging app in many countries. For small businesses, it's where their customers already are. But here's the problem: most small business owners can't afford to hire someone to reply to messages 24/7. That's where bots come in. My Tech Stack After testing dozens of combinations, here's what I settled on: WhatsApp Business API (via WAHA — self-hosted, no per-message fees) n8n for workflow automation (self-hosted, queue mode for reliability) PostgreSQL for conversation state and analytics Docker for deployment and scaling AI/LLM integration (Claude, GPT) for natural language understanding Why WAHA over the official Cloud API? Feature WAHA (Self-hosted) Cloud API C