About CashStack

What CashStack does

Most people leave real money on the table by using the wrong cashback cards for their spending. CashStack fixes that. Tell us how you spend — either with a quick questionnaire or by uploading a statement — and we build the optimal "stack" of cards for your actual habits, accounting for category rates, annual fees, bonus caps, credit-score eligibility, and the fine print most tools ignore (like warehouse-club exclusions and travel-portal-only rates).

How it works

• Tell us your spending — answer ~11–14 quick questions, or upload a CSV/PDF statement and we detect your categories.
• Add your credit score — so we only show cards you're likely to qualify for.
• Compare — see your optimized stack next to the cards you already carry, with exactly how much more you'd earn.
• Decline & refine — drop any card you don't want and we bring in the next best option instantly.

Built privacy-first

Your statements are read entirely on your own device. We never upload or store your raw statements, account numbers, or name. See our Privacy Policy for the full details, including how optional future Premium features handle data.

How we make money (and why rankings stay honest)

Some "Apply" buttons are affiliate links — if you're approved for a card, the issuer may pay us a commission at no cost to you. Crucially, this never changes how cards are ranked. Recommendations are ordered purely by what earns you the most. That independence is the whole point of CashStack.