Built by a Collector, for Collectors
CardfolioIQ™ was born from a simple frustration — and 30 years of loving the hobby.
After 30 years as a collector, I kept asking the same question every serious collector asks — what is my collection actually worth right now, and where is it headed?
Spreadsheets, notebooks, and gut instinct only get you so far. The sports card market moves fast — values shift overnight, graded populations change, and the difference between a smart hold and a missed exit can be thousands of dollars. Collectors and investors deserve better tools.
That's why I built CardfolioIQ™. A platform that brings institutional-grade portfolio intelligence to every collector — whether you're managing a handful of prized rookies or a six-figure investment collection. Market-based valuations, AI-powered trend analysis, and a clean dashboard that finally makes your collection feel like the asset it is.
This isn't just software. It's the tool I always wished existed.
Greg Maziarz
Founder & Collector, CardfolioIQ™
Know Your Value
Every card in your collection deserves an accurate, market-based valuation — not a guess. We blend recent sales data, graded population reports, and AI analysis to give you the number that matters.
Collect Smarter
Timing matters in this hobby. Our AI signals surface emerging trends, flag potential opportunities, and help you make more informed buy, hold, and sell decisions as market conditions evolve.
Own Your Data
Your portfolio is your asset. CardfolioIQ™ gives you full visibility — historical performance, variance audits, and exportable reports — so you're always in control.