StackPack

Stackpack is an AI-powered vendor and spend management platform built for finance, operations, and IT teams at startups and growth-stage companies. Founded in August 2023 by Sara Wyman, Stackpack connects to a company's accounting systems and card feeds via a two-click setup to deliver a complete, real-time view of every vendor, contract, and software subscription — including shadow spend and ghost vendors that teams didn't know they were still paying for. The platform provides automated renewal tracking with proactive alerts before contract windows close, department-level spend breakdowns for accurate forecasting, and a finance-specific AI assistant that answers plain-English questions about vendor data in seconds. Stackpack integrates with NetSuite, QuickBooks Online, and Sage Intacct, and has crossed $4 billion in AI and vendor assets under management.