Billy - AI Invoice Manager

Connect Gmail via OAuth, auto-classify invoices with OpenAI, and extract VAT/total/vendor/date with a clean dashboard.

Overview:

Full-stack pipeline from Gmail to AI extraction into a searchable ledger.

Problem:

Receipts scattered across threads waste time and introduce errors.

Solution:

Gmail OAuth, incremental sync, AI parsing with rule fallbacks, and Postgres via Prisma.

Technical Challenges:

Template diversity and scanned PDFs; hybrid heuristics.
Quotas & idempotency; safe incremental polling.

Results:

Zero manual entry, faster reporting and reliable filtering by vendor/date/amount.

Highlights:

Gmail OAuth + incremental sync
AI extraction + fallbacks
Postgres + Prisma
Search & filters