Inventro Inc. makes booking and inventory software for party and event rental businesses. The company was founded in 2025 in Ontario, Canada, by people who ran a party rental business and wanted one place to see what's available on a date, take bookings, and send quotes, contracts and invoices. Inventro serves small and mid-size rental operators in the US and Canada, including party, tent, inflatable, wedding, and table and chair rentals.