Multi-Channel Chat Widget SaaS — Next.js + Fastify + Stripe

I built PingBoost: a self-hosted SaaS that drops WhatsApp, Telegram, and Viber on any site through a single 15 KB gzipped snippet for $39 lifetime, replacing $19–29/mo widgets. Stack: Next.js 16 static landing, Fastify license server (SQLite WAL), TypeScript widget. Loop: Stripe Checkout → Resend key delivery → /build visual editor → domain-bound auto-binding license. Three shipped releases, zero breaking changes — every v1.0 snippet still works in v2.1. I build similar end-to-end SaaS loops tailored to your stack. Let's ship yours.