# PaperPilot: Turning Messy GST Invoices into Clean Records with Gemma

> Source: <https://dev.to/sahil27/paperpilot-turning-messy-gst-invoices-into-clean-records-with-gemma-3p1d>
> Published: 2026-10-17 15:55:51+00:00

*This is a submission for the [Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle](https://dev.to/challenges/hacktoberfest-week2-2026-10-12)*

**PaperPilot** is an invoice and expense assistant for freelancers, consultants, and small agencies.

Anyone who works for themselves ends up with a folder of PDF invoices and a dreaded tax season. Someone has to type every vendor, date, and total into a spreadsheet, spot the invoice that was uploaded twice, and remember who hasn't paid. In India there's an extra layer: GSTIN numbers and CGST, SGST, and IGST splits that generic tools handle poorly.

With PaperPilot you upload a digital PDF invoice and the app:

PaperPilot reads PDF invoices with **Gemma, an open-weight AI model**, checks the results
and organises everything into searchable records and CSV exports
Built for freelancers, consultants, and small agencies.

**The open model is Gemma.** I use Gemma, Google's open-weight model, called through the Gemini API with a standard API key.

**Pipeline:**

**Stack:** Python, Streamlit, PyMuPDF, SQLite, pandas, and Gemma via the Gemini API.