Five Guys vs In-N-Out.
Two hand-cut fresh fries, two dedicated fryers, two different oils, two different potato varieties. Both all-green chains. Which one wins?
Two of the eight all-green chains on Frypedia. Both hand-cut fresh potatoes in-store. Both commit to a dedicated fryer. Both have loyal regional fan bases who will tell you, with conviction, that theirs is the best fry in America. They're the chain-vs-chain comparison people bring up more than any other fry pairing. So which one is "better"?
That depends entirely on what you're optimizing for.
The potato difference is real.
Five Guys uses standard Russet potatoes, mostly from Idaho and Washington growers. The chain rotates regional sources based on season and supply; at any given time, your fries may come from a specific grower farm, which Five Guys will sometimes list on a blackboard inside the store. The Russet produces a fluffy-interior, crispy-exterior fry that browns deeply and holds its shape through the heat-lamp window.
In-N-Out uses Kennebec potatoes, and has since 1948. The Kennebec is a waxy, thin-skinned variety that produces a denser, more potato-forward fry. Kennebecs are more expensive than Russets, less consistent from batch to batch, and harder to source at scale. They're also beloved by serious fry enthusiasts for one specific reason: the flavor. A Kennebec fry tastes more like potato than a Russet fry does.
Hopdoddy uses Kennebecs too. So does Shake Shack, for what it's worth. But In-N-Out was the first major fast-food chain to commit to the variety, and still serves more Kennebec fries per day than anyone else in America.
The oil difference is also real.
Five Guys fries in 100% peanut oil. Peanut oil has a high smoke point, a distinctive but subtle flavor, and — most importantly for a hand-cut fresh fry — produces a deeper, crispier exterior than most alternatives. If you've had a Five Guys fry and noticed how much crisper it is than a drive-through fry, that's the peanut oil doing the work. The trade-off is obvious: peanut allergies are common, and anyone with one has to skip Five Guys entirely.
In-N-Out fries in 100% sunflower oil. Lower smoke point than peanut, cleaner flavor, no peanut allergy concern. The resulting fry is lighter-colored, less aggressively crisp, more subtly flavored. Some people call it "softer" than Five Guys; others call it "more potato-forward."
The portion difference is huge.
A Five Guys "Little" order of fries weighs 227 grams. An In-N-Out "Regular" weighs 125 grams. That's almost twice as much fry at Five Guys for what the menu calls the small size. And Five Guys famously overfills: the paper cup holds the technical portion, and the bag typically contains a generous handful of additional fries poured on top.
Per gram, the nutrition is roughly comparable. Per order, Five Guys delivers 526 calories and 531 mg sodium to In-N-Out's 370 calories and 250 mg sodium. If you're counting either metric, In-N-Out is the easier choice.
But the per-gram math reveals something interesting: In-N-Out's fries are actually lower in sodium per gram than Five Guys by a meaningful margin. Even normalized for portion, In-N-Out has the lighter salt hand.
The dietary verdict.
Both chains are fully Suitable for vegetarians, vegans, celiacs, and dairy-free diners. Both are Caution for kosher and halal (no certification). Both have dedicated fryers with no meat-related cross-contact. For the overwhelming majority of dietary restrictions, you can't go wrong with either.
The exception: if you or anyone in your party has a peanut allergy, Five Guys is off the table. Not just the fries — Five Guys has bags of raw peanuts available for customers and the peanut exposure in the restaurant environment is significant. In-N-Out has no peanut products anywhere in the store.
The verdict.
If you want the bigger fry experience, Five Guys wins. More fry per order, deeper crispiness, more aggressive flavor.
If you want the cleaner, more potato-forward fry, In-N-Out wins. The Kennebec variety plus the sunflower oil produce a meaningfully different product.
If you're watching calories or sodium, In-N-Out wins by a clear margin.
If anyone you're eating with has a peanut allergy, In-N-Out is the only answer.
If you care about regional authenticity, they're both right. Five Guys is east-coast-born and still best at the original Arlington-area stores. In-N-Out is California-born and still best at its original Baldwin Park location, though the product is remarkably consistent across every location. Either way, you're getting something that's as close to "hand-cut fries, dedicated fryer, real potatoes" as American fast food delivers.