From Manual Data Entry to AI-Powered Automation: Building an Invoice Information Extractor with n8n

Oct 21, 2025 · 11 min read · I built an AI-powered invoice automation that processes invoices in 6 seconds, saves 99.1% of manual data entry time, and cuts costs by $575/month. Using Mistral AI for OCR, OpenAI GPT-4o-mini for extraction, and n8n for workflow orchestration. The ...