Rao's vs Prego: Which Pasta Sauce Is Actually Better?
The premium jar against the supermarket staple. Rao's Homemade Marinara is the cult favorite with the short ingredient list; Prego Traditional is the sweet, familiar default in millions of pantries. On our grade Rao's wins — but the gap is narrower and more specific than the price difference suggests. Every number below is pulled live from each product's graded fact sheet.
The short answer
Rao's Homemade Marinara takes it, scoring B- (72/100) to Prego's C+ (68/100). The reason is one line on the panel: sugar. Rao's lists 4 g per serving with zero added sweetener — just what's in the tomatoes — while Prego lists 10 g, with sugar as its third ingredient. That's roughly 2.5x the sugar, and it's the whole grade gap.
Prego Traditional isn't a bad jar, and it wins a few honest points: it's lower in calories (69.6 vs 80 per serving), lower in saturated fat (0 g vs 1 g), carries a bit more fiber (3 g vs 1 g), and is fully plant-based. If you like its rounder, slightly sweet flavor, none of that is a problem in a normal portion.
One thing they share: sodium. Both are salt-heavy — Rao's 430 mg and Prego 480 mg per serving — which is the ceiling on the entire jarred-sauce category. Neither escapes it, and protein is a non-factor here: both are 2 g, because marinara is a vegetable sauce, not a protein food.
Side-by-side
Both labels call a serving "1/2 cup." Rao's measures it as 125 g; Prego as 120 mL. Bold marks the better number on each row.
| Rao's Homemade Marinara | Prego Traditional | |
|---|---|---|
| Labelgrade | B- 72 / 100 | C+ 68 / 100 |
| Serving size | 125 g | 120 mL |
| Calories per serving | 80 | 69.6 |
| Total sugar | 4 g | 10 g |
| Sugar per 100 g/mL | 3.2 g | 8.3 g |
| Added sugar | None listed | Sugar is 3rd ingredient |
| Sodium per serving | 430 mg | 480 mg |
| Sodium per 100 g/mL | 344 mg | 400 mg |
| Saturated fat | 1 g | 0 g |
| Fiber | 1 g | 3 g |
| Protein per serving | 2 g | 2 g |
| Sugar grade | A+ | C |
| Sodium grade | C | C |
| Saturated fat grade | A+ | A+ |
| Fiber grade | F | D |
| Ingredient quality grade | B | B |
Where Rao's wins
- No added sugar. This is the headline. Rao's 4 g of sugar is entirely from the tomatoes — the USDA entry lists 0 g added. Prego's 10 g rides on sugar listed third on the panel, ahead of the oil and salt. That's a A+ sugar grade for Rao's versus a C for Prego, and on a sauce — where sugar and sodium decide almost everything — it's the difference-maker.
- Slightly lower sodium. 430 mg per serving vs Prego's 480 mg. It's a modest edge (19% of the daily limit vs 21%), and both still grade in the C band, but in a category defined by salt, less is better.
- The shortest, cleanest label. Whole peeled tomatoes, olive oil, onions, salt, garlic, basil, black pepper, oregano — recognizable food, no thickeners, no "natural flavor," no added sweetener. It's the kind of back panel that gives a premium price something to stand on.
Where Prego wins
- Lower calories. 69.6 per serving vs Rao's 80. Rao's carries more olive oil, which is the better fat but the heavier calorie line. If you're counting, Prego is the lighter pour.
- Lower saturated fat. 0 g vs Rao's 1 g — Prego actually posts a perfect A+ here, edging Rao's A+. Both are low; this is a small, real point for Prego.
- A bit more fiber. 3 g per serving vs 1 g, thanks to the diced tomatoes Prego layers on top of its puree base. Modest in absolute terms, but a notch above the smoother jar.
- Genuinely vegan, and cheaper. No cheese, no dairy of any kind — Prego passes a plant-based screen, and it costs roughly half what Rao's does.
Where it's a tie
- Sodium pressure. Rao's wins the row, but only just — both land in the C band (C vs C), and both push past 800 mg at the portion most people actually plate. Neither is a low-sodium choice.
- Ingredient quality grade. Both score B. Rao's list is shorter and cleaner, but Prego's is also recognizable and additive-free — the grade treats them as a wash on this dimension even though Rao's reads better.
- Protein. 2 g each. This is marinara; protein isn't the reason to buy either one.
Which should you buy
Buy Rao's Homemade Marinara if avoiding added sugar is your rule, you want the shortest and cleanest ingredient list on the shelf, or you simply prefer how it tastes. It's the higher-graded jar, and the 4 g of (tomato-only) sugar plus a touch less sodium are exactly what earn it the B-. Just go in knowing the premium buys you one grade notch, not a transformation.
Buy Prego Traditional if you like its signature rounder, sweeter flavor, you're watching calories or saturated fat specifically, or you want a familiar plant-based sauce at half the price. The 10 g of sugar is the cost — it's the one number holding Prego to a C+ — but in a normal portion it's a flavor choice, not a health alarm.
For the best value of all, note that neither is the highest-scoring jar we grade. A no-added-sugar sauce like Classico matches Rao's grade at a fraction of the price, and the whole category lives and dies on sodium more than anything else. We rank every jar head-to-head in the pasta sauce report card.
How they were graded
Both products use the v3 6-dimension Labelgrade formula (see /methodology): protein density 23% + ingredient quality 21% + saturated fat 18% + sodium 15% + sugar 15% + fiber 8%. For a vegetable sauce, the protein and fiber dimensions are structurally low for both, so the grade is decided by sugar and sodium — which is why Rao's no-added-sugar label is the deciding factor. Rao's data from USDA FDC 2403200; Prego data from USDA FDC 1627045. Every figure on this page is read live from each product's record at build time, so the numbers can't drift out of sync with the individual fact sheets.
Frequently Asked Questions
Which is healthier — Rao's or Prego?
Rao's Homemade Marinara grades a notch higher: B- (72/100) versus Prego Traditional's C+ (68/100) on the same v3 formula. The whole gap is sugar. Rao's lists 4 g of sugar per 125 g serving with no added sweetener; Prego lists 10 g — about 2.5x as much — with sugar as its third ingredient. On sodium they're close (Rao's 430 mg vs Prego 480 mg per serving), and both are salty by the standard of the category.
Does Rao's really have no added sugar?
Yes. The USDA Branded Foods entry for Rao's (FDC 2403200) lists 0 g of added sugar — the 4 g of sugars per serving are naturally occurring in the tomatoes. Its ingredient list is just whole peeled tomatoes, olive oil, onions, salt, garlic, and herbs. Prego (FDC 1627045) lists sugar as its third ingredient, directly behind the two tomato components, so most of its 10 g is added sweetener. That difference is exactly what separates a A+ sugar grade from a C.
Which has more sodium?
Prego, slightly. Prego carries 480 mg of sodium per serving (21% of the 2,300 mg daily limit) versus Rao's 430 mg (19%). Per 100 g/mL that's about 400 mg for Prego and 344 mg for Rao's. Both are high — sodium is the structural ceiling for jarred sauce, doing flavor and preservation work — and both grade in the C band on this dimension (Rao's C, Prego C). Whichever you buy, the real-world portion most people plate (closer to a cup) roughly doubles these numbers.
Is Prego worse for you because it has sugar?
"Worse" is strong — 10 g of sugar is about two and a half teaspoons, and a normal portion of pasta sauce isn't where most people's sugar budget gets blown. But it is the single reason Prego trails Rao's on our grade. If your one rule is "no added sugar," Rao's passes and Prego doesn't. Prego does win a couple of genuine points back: it's lower in calories (69.6 vs Rao's 80 per serving), lower in saturated fat (0 g vs 1 g), and carries more fiber (3 g vs 1 g).
Is Rao's worth the extra money over Prego?
On nutrition, the honest answer is "a little, not a lot." Rao's costs roughly double, and on our scale it buys you one grade notch — driven almost entirely by the missing added sugar and a cleaner, shorter ingredient list (just tomatoes, olive oil, onions, garlic, herbs). If you're avoiding added sugar specifically, or you simply love the taste, Rao's earns it. If you want the lowest sugar at the lowest price, note that a no-added-sugar jar like Classico grades the same as Rao's for far less — we compare those directly in our <a href="/report-card/pasta-sauce">pasta sauce report card</a>.