# Stackifier > WhatsApp customer, booking, and billing follow-up for Malaysian operators. Stackifier turns customer questions, booking requests, invoices, receipts, payment slips, and billing messages from WhatsApp into a clean operating record. Teams can see what is unanswered, unpaid, booked, blocked, or ready for approval, then shape exports around finance and Malaysia E-Invoice workflows. ## Key Pages - Home: https://stackifier.com/ - Mission: https://stackifier.com/mission - Industries overview: https://stackifier.com/industries - Wholesale and Distribution: https://stackifier.com/industries/wholesale-distribution - Construction and Contracting: https://stackifier.com/industries/construction-contracting - Retail and Ecommerce: https://stackifier.com/industries/retail-ecommerce - Property and Facilities: https://stackifier.com/industries/property-facilities - Field Services: https://stackifier.com/industries/field-services ## What Stackifier Does - Reads customer questions, booking requests, invoices, receipts, payment slips, PDFs, and order notes forwarded through WhatsApp. - Keeps a Google Sheets-first customer, service, or billing record current during the pilot. - Shows unanswered questions, requested bookings, unpaid invoices, payment follow-up status, and blocked work by customer, entity, project, property, or job. - Drafts WhatsApp replies, booking confirmations, reminders, receipts, and statements for human approval. - Prepares finance-ready fields and exports for accountant or MyInvois review. ## What Stackifier Does Not Claim - Stackifier does not replace accountants. - Stackifier does not claim to be a MyInvois submission system unless a customer-specific integration is built and verified. - Stackifier does not send customer reminders without the team's chosen approval rules. ## Buyer Fit Best fit: Malaysian SMEs and operators that already run billing follow-up through WhatsApp, Google Sheets, PDFs, screenshots, and staff memory. Common industries: wholesale, distribution, construction, contracting, retail, ecommerce, property operations, facilities, maintenance, and field services.