CardStack
AI agent that maximizes your credit cards
CardStack launched on April 19, 2026 with 3 votes, #2,709 of 21,248 launches that month and more than 50% of that year's launches.
What it does
Most people with premium credit cards leave $500-1000/year on the table in unused credits, offers, and wrong-card swipes. CardStack connects to your actual spending via Plaid and uses AI to show you exactly what you're missing — in dollars, not percentages. Track every credit. Auto-enroll Amex and Chase offers. Know which card to use at checkout. See your real ROI per card. Built for Amex, Chase, and premium card power users who are tired of managing their wallet in a spreadsheet.
The credit card benefits tracker for iPhone. CardStack catches expiring statement credits, flags missed rewards, and shows whether your annual fees pay for themselves.
CardStack tracks the benefits and rewards on every card you own. Tells you which card to use. Reminds you before credits expire. Ask anything about your cards, points, credits and rewards — and get an answer that actually knows your wallet. The CardStack extension enrolls eligible offers automatically and surfaces them while you shop—so you never miss great deals. CardStack lines up what you got from each card against what you paid—so you know who's carrying you and who's dragging you. See redeemed vs. active credits, and upcoming expirations across all your cards in one place. Sync your transactions with CardStack+ to automatically track most credits. CardStack breaks down every…from cardstack.money
Does a similar job
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Agentcard for companiesJul 2026 · agentcard.sh · ▲189Agentcard gives every user of your product a wallet their agent can spend from. Cards go in once. Purchases come out priced, approved, and paid.
- IBI built a tool to manage and compare credit card rewards2025 · rewards.getonecard.io · ▲87
This is a free tool that helps you manage and visualize your credit card rewards across different categories. You can input the cards in your wallet and see how they complement each other, spot gaps in your setup, and also see the best card to use for a given merchant. I’m also a founder at OneCard, where we’re building a smart card that’ll eventually handle all of this automatically, routing each purchase to the best card in real-time. Would love feedback from the HN community!
- TOTired of reading NerdWallet to see the best credit card? I automated it2020 · savewithtrove.com · ▲48
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