WhatsApp Food Ordering AI Chatbot

I need an end-to-end WhatsApp Business API solution that lets customers browse the menu, place their order, and complete payment without ever leaving the chat. The flow must feel natural and AI-driven, handling these three core interactions seamlessly: browsing menu items (with photos), placing orders with an add-to-cart experience, and making payments through PayPal.

Key functions on the customer side
• Pincode checker to confirm delivery zones before the order begins
• Visual menu catalogue with item images delivered inside WhatsApp
• Real-time cart management, coupon application, and order summary
• Secure PayPal gateway so payment happens in-chat
• AI chatbot layer that answers product or order questions automatically

Web admin dashboard
I want a clean, future-proof panel where I can:
• Add, edit, or deactivate menu items and upload images
• Generate and track coupon codes
• See live orders, payment confirmations, and customer details

Technical expectations
– Must integrate the official WhatsApp Business API (no work-arounds)
– Modular codebase so additional features can be added later
– Clear documentation for both the chatbot logic and the admin panel

When you reply, please include:
1. Fixed quotation or rate structure
2. Estimated development timeline with major milestones
3. Technology stack you plan to use (frameworks, databases, hosting)
4. Links or screenshots of any similar WhatsApp chatbots you have delivered

I’m aiming for a robust, scalable solution that is easy for both diners and staff to use. I’ll review proposals as they arrive and move quickly once I find the right fit.