Human-Approved AI Billing Coordinator
One conversation. One approval. One finished invoice.
Creates customer-ready invoice drafts in under 60 seconds from spoken words — then waits for owner approval before delivery.
Designed for service businesses where trust matters as much as speed.
BellaBilling doesn't replace the business owner. It replaces the paperwork.
Architecture serves trust. Security serves the business.
BellaBilling™ is a production-oriented AI billing coordinator developed by ZaderFlo Systems. This capstone demonstrates how the principles taught throughout Google's AI Intensive were applied to the design, architecture, and implementation of a real-world agentic system.
BellaBilling is a human-approved AI billing coordinator designed for service businesses. In the following live workflow demonstration, you'll watch a completed job become a customer-ready invoice using nothing more than a natural conversation and a single approval.
Eleven steps from a spoken conversation to a delivered invoice — with one non-negotiable checkpoint in the middle.
Business owners describe completed work exactly as they normally would.
Bella transforms conversation into an editable invoice draft.
Nothing reaches the customer without explicit owner approval.
Every concept below maps directly to a decision made inside BellaBilling's architecture.
The agent only receives the structured context it needs — job details, customer info, and pricing — nothing more.
The LLM does not operate alone; it runs inside a controlled workflow with tools, state, and approval gates.
Make coordinates every step across voice, extraction, spreadsheets, documents, and email without manual handoffs.
Each step in the pipeline performs one clear job, from transcript parsing to document generation.
No invoice is treated as final or sent to a customer without an explicit owner decision.
The system prevents customer-facing delivery until the owner explicitly approves the invoice.
The workflow uses real services including voice intake, orchestration, Google Sheets, Google Docs, PDF generation, and email delivery.
Every draft, approval, and delivery is visible and traceable inside the owner's dashboard.
Designed for real business workflows — not demonstrations.
Natural conversation serves as the primary interface for invoice creation.
Every invoice requires explicit owner approval before customer delivery.
Each stage of the workflow remains visible and reviewable from the owner's dashboard.
Approved drafts are transformed into professionally formatted PDF invoices.
Completed invoices are automatically prepared and delivered to the customer.
Built using real workflow infrastructure rather than simulated components.
API keys, credentials, and internal production configuration are intentionally excluded from public materials.
Service businesses don't lose revenue because they lack expertise. They lose time to administration. BellaBilling transforms a completed conversation into a customer-ready invoice while keeping the business owner in complete control.
The human makes the decision.
The system handles the work.
Business Systems.