CardStack is AI that manages your credit cards for you. It connects to your real spending, catches every wrong swipe in dollars, tracks every credit.
Your credit cards are costing you money. You just don't know how much yet.
The average premium cardholder misses over $1,900 a year in unused credits, wrong card swipes, and forgotten benefits. Not because they're careless — because no human can track 47 credits across 9 cards with different reset dates, earn rates, and bonus categories.
Stack Agent can.
Stack Agent is AI that manages your credit cards for you. It connects to your real spending data, analyzes every transaction, and tells you exactly what you're missing — in dollars, not vague percentages.
WRONG CARD DETECTION
You swiped your Bilt card at dinner. Your Amex Gold earns 4x there. That one swipe cost you $4.71 in missed rewards. Stack Agent catches every one of these and shows you the better card, the earn rate difference, and the exact dollar amount you left on the table. Last month you optimized 97% of your swipes. Stack Agent found the other 3%.
CREDIT TRACKING THAT ACTUALLY WORKS
Your Amex Platinum has $2,000+ in credit