Butter sits in your browser, detects when you're at checkout, and tells you which card in your wallet earns the most for that exact purchase. Automatically.
The average Canadian with 3 cards leaves $520/year in rewards unclaimed. See what you left →
Pick a wallet, set a purchase, change the category. Real Canadian cards, real earn rates — the same engine running inside the extension.
Earns 6× Scene+ (900 pts @ 1¢/pt) — $9.00 on this $150 purchase.
Add Butter to Chrome in one click. No account, no signup, no card number.
Tell Butter which cards you own by name — Cobalt, Scotia Gold, Rogers. No numbers, no CVVs.
Butter detects checkout pages automatically and shows which card earns the most.
The average Canadian with three credit cards leaves this much in rewards unclaimed every year. Not because they don't care — because no one told them which card to use.
I built Butter because I kept getting to checkout and having no idea which of my four cards to use. I knew some earned more on groceries, one was better for travel — but in the moment I just guessed.
Turns out I was leaving a few hundred dollars a year on the table. Not through carelessness — just because the information wasn't there when I needed it.
Butter is the tool I wanted to exist. It watches the checkout, does the math, and tells you which card wins. That's it.
Free, private, and takes about 30 seconds to set up.
No account required · No card numbers · No data sent · Privacy policy