Contrata Sofi

Built with ChatGPT + Claude Code

A multi-tenant AI employee that answers customers on WhatsApp, 24/7.

The problem

Small businesses miss customers because nobody can answer WhatsApp fast enough — nights, weekends, mid-service. Every missed message is a lost booking.

The solution

“Sofi” is a multi-tenant SaaS: an AI employee that answers customers over WhatsApp for many businesses at once — clinics, spas, tours — each with its own plan, numbers, and billing. An admin HQ manages every tenant; each business gets its own isolated panel.

Stack

Next.jsReactMulti-tenant Node backendPostgreSQLWhatsApp Business APIAI modelStripe subscriptionsRailway

Interactive demo

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Built with ChatGPT + Claude Code.

The exact system behind Contrata Sofi is in the book.

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