Unpaid connects to Xero, QuickBooks, or Stripe and automatically sends AI-written payment reminders on a 5-stage escalation from friendly nudge to final notice. What makes it different: - Claude AI writes genuinely personalised emails (not templates) - Early reminders send automatically; firmer ones need your approval first - Detects customer replies, disputes, and payment promises - Verifies payments and sends branded receipts 14-day free trial, no credit card. Set up in 60 seconds.