Your credit cards owe you $500+ a year.

CardStack tracks every credit, offer, and renewal in one place. Tells you which card to use. Reminds you before benefits expire.

Works with Amex, Chase, Capital One, Bilt, and more.

CardStack Wallet — your cards and benefits in one place
CardStack Home — For You, credits, and what matters now
CardStack Swipes — spending analysis, earned vs missed points

Credits expire.

Offers go unclaimed.

You swipe the wrong card.

And the banks win.

Here's how CardStack fixes that.

Introducing Stack

Your credit card AI agent

Ask anything about your cards, points, credits and rewards — and get an answer that actually knows your wallet.

Learn more

Stack chat showing an SFO to LHR business-class award redemption breakdown
What Stack Can Do — example prompts for your AI credit card agent
Stack chat showing a full credit card portfolio report — fee coverage and action items

Automatically Add Every Offer

Put your Amex & Chase Offers on Auto-Pilot

The CardStack extension enrolls eligible offers automatically and surfaces them while you shop—so you never miss great deals.

Available on

Know where you stand

Are your cards worth it?

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.

CardStack ROI

$2,847

Credits Captured

fees credits
$695 $3,420
Fees covered! You're up $2,152 net this year.

Track Every Credit Card Benefit

Always know what's left—and when it resets.

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.

$100 Resy Credit
The Platinum Card® card The Platinum Card® Resets tomorrow
$75 lululemon Credit
The Platinum Card® card The Platinum Card® Redeemed
$15 Uber Cash
The Platinum Card® card The Platinum Card® Resets in 30 days

Analyze Every Swipe

Stop wondering if you left rewards on the table.

CardStack breaks down every purchase—points, miles, or cash back you earned, and what a better card could have returned.

Automatic. Updated with your spending.

Safeway logo

Safeway

5246 • Bilt Mastercard® Palladium

$44

Posted

Category

Groceries

Reward Details

Metric Used Best Card
Card
Bilt Mastercard® Palladium card
American Express® Gold Card card
Earn Rate 2x 4x
Points 227 454
Point Value 2.20¢ 2.00¢
Est. Value $4.99 $9.08
Difference +$4.09

Use the best card

The right card. Every time.

Search by category—dining, groceries, travel, gas—or by where you are. CardStack ranks your stack and highlights the highest return for that moment.

Instant answers from your real wallet.

Categories

Dining

4X

American Express® Gold Card card

Flights

5X

The Platinum Card® card

Everyday

2X

Bilt Mastercard® Palladium card

Nearby

Wholefoodsmarket logo

Whole Foods Market

4X

American Express® Gold Card card
Chevron logo

Chevron

2X

Bilt Mastercard® Palladium card
Starbucks logo

Starbucks

4X

American Express® Gold Card card

Never let anything slip.

CardStack watches your cards around the clock so nothing you've paid for goes to waste.

Credit available

8:12 AM

Your The Platinum Card® $200 Airline Fee Credit is now available.

Credit expiring soon

9:00 AM

$120 Resy Credit on The Platinum Card® expires in 3 days.

Credit auto-tracked

2:34 PM

$15 Uber Cash on The Platinum Card® was marked used for March 2026 from your statement.

$695 annual fee charged

6:48 PM

Your The Platinum Card® annual fee just posted. Tap to see if it's worth keeping.

Track points in one place—and know what they’re worth.

One portfolio for your points—balances, current valuations, and realistic redemption paths—without juggling issuer apps.

And with CardStack+, automatically track your American Express and Chase points with support for more programs rolling out soon.

Points tracker portfolio

The right card—before you pay.

The CardStack extension shows which of your cards wins on that site, and surfaces enrolled Amex and Chase offers while you check out.

Available on

CardStack browser extension on Grubhub showing the American Express Gold dining credit and best card for the site

One glance, on your screen.

CardStack widgets put best-card picks, expiring credits, and nearby winners on your Home Screen and Lock Screen—so you don't have to think about it.

What people are saying.

Works with the cards you actually use.

100+ popular cards supported, and more added every week.

Everything in CardStack+

Try it free—offers, sync, transaction analysis, best card, widgets, extensions, and more. Cancel anytime.

Features
Free
CardStack+
Add & Manage Cards
Manual Credit Tracking
Bank Sync Automatic Credit Tracking
Via Browser Extension Auto-Add Amex & Chase Offers
Stack AI Agent
Finds Missed Rewards Spending Analysis
Apple Wallet Best Card Recs
Track Points & Transfer Bonuses
iOS Widgets
Via Browser Extension Best Card & Offer recs while browsing
Pricing 7-day free trial on CardStack+ · Cancel anytime
$0
$7.99/mo or $69.99/yr

Try For Free.
Then put everything on auto-pilot with CardStack+

Questions, answered.

What is CardStack+?
CardStack+ is the full CardStack experience: automatic offer activation (Amex & Chase), Plaid transaction sync, spending optimization, points tracking, widgets, the best-card engine, and browser extensions. You start with a free trial, then subscribe to keep access.
How much does CardStack+ cost?
CardStack is free to download. The free tier includes adding cards and manual credit tracking. CardStack+ is $69.99/year or $7.99/month after a 7-day free trial. Cancel anytime in your App Store subscription settings.
Can I try CardStack+ before paying?
Yes. You get a 7-day free trial of CardStack+ before you're charged, and you can cancel anytime in your App Store subscription settings.
Which banks and cards work with CardStack?
CardStack supports 100+ popular cards from Amex, Chase, Capital One, Citi, Bilt, Marriott, Hilton, Delta, and more. With CardStack+, Plaid also supports thousands of US banks and credit unions for transaction syncing.
Can I use CardStack without linking a bank?
Yes. You can add cards, track credits and perks, and use core CardStack features without connecting a bank. Linking accounts through Plaid (with CardStack+) unlocks automatic transaction sync, spending analysis, and swipe-by-swipe earned vs missed rewards.
How do Amex & Chase offer activation and the extensions work?
The CardStack browser extension for Chrome and Safari can enroll eligible Amex and Chase offers while you shop online, so you spend less time hunting in each issuer's app. You control the extension in your browser settings. Automatic offer activation is part of CardStack+.
Is my financial data safe?
Yes. CardStack uses bank-level encryption, and your credentials are never stored. Connected accounts use Plaid for secure, read-only access.
What does Plaid see when I connect my bank?
Plaid provides read-only access to linked accounts so CardStack can sync transactions and balances. CardStack never sees or stores your bank login credentials—those stay with Plaid and your financial institution. You can disconnect accounts anytime.