Affordable Solutions for Managing Reference Customers in SFDC

Hi all! What's anyone using for managing your reference customers and their usage (especially for revenue influence on Closed Won opps in SFDC)? I've had ReferenceEdge in the past, but it's more than we need and is pretty expensive. Looking for something no cost, or low cost, to replace the completely manual Excel sheet we're using now. 🤯 Maybe a SFDC app?