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Prices come from Amazon and were right at the time shown. They can change; the price on Amazon at checkout is the one you pay.
Quick Picks
| # | Pick | |
|---|---|---|
| 1 |  Purely Inspired Organic Protein The cheapest flavored protein in our top 10: 20 g pea-rice protein per scoop plus a stealth fruit-veggie blend. |
$17.97Check price |
| 2 |  Orgain Organic Plant-Based Protein Powder The 20-serving Vanilla Bean tub: 21 g per 2-scoop serving, 4 g fiber, third-cheapest protein in our top 10. |
$29.59Check price |
| 3 |  Naked Pea Protein The 1 lb size (about 15 servings): same one-ingredient powder, smaller upfront cost. |
$19.99Check price |
| 4 |  KOS Organic Plant Protein A smaller tub keeps KOS’s upfront cost down; 20 g protein per 2-scoop serving. |
$21.96Check price |
The Breakdown
Saving money on supplements shouldn’t mean drinking chalk. A quick Amazon sweep shows plenty of vegan tubs under thirty bucks that still hit the protein benchmarks athletes and dieters need. USDA retail data confirm animal-protein prices per gram keep climbing while plant sources hold steadier, so legumes win the value war before you even tap “Add to Cart.”
Price only matters if the macros deliver. Look for at least twenty grams protein per scoop and fewer than three grams sugar; that keeps cost per usable gram low and insulin spikes off the scoreboard. SPINS’ 2024 market review notes that consumers rank value second only to flavor when rebuying plant powders, so brands keep sharpening price points to stay in carts.
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Purely Inspired Organic Protein: Sixteen-serving French Vanilla tub with 20 g pea-rice protein
per scoop plus a stealth fruit-veggie blend, and the cheapest
flavored protein in our top 10. VegFAQs scored its mixing 21.9 out
of 25 and called the taste “drinkable, not really good or bad.”
Full review.
Purely Inspired Organic Protein$17.97 as of Nov 3, 10:38 PM ETCheck price on Amazon →
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Orgain Organic Plant-Based Protein Powder: The 20-serving Vanilla Bean tub, with 21 g protein per 2-scoop
serving and 4 g fiber at the third-lowest cost per gram in our top
10. Taste is the trade-off: Garage Gym Reviews and BarBend both
scored it 2 out of 5, so blend it with fruit.
Orgain Organic Plant-Based Protein Powder$29.59 as of Nov 3, 10:38 PM ETCheck price on Amazon →
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Naked Pea Protein: Grab the 1 lb size (about 15 servings) to keep the upfront cost
low. 27 g protein and 2 g carbs per 2-scoop serving, one ingredient,
Informed Choice certified. Want the lowest cost per gram? Naked’s
5 lb tub is the cheapest protein in our top 10.
Naked Pea Protein$19.99 as of Nov 3, 10:38 PM ETCheck price on Amazon →
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KOS Organic Plant Protein: A smaller tub keeps the upfront cost down. 20 g protein per
2-scoop serving, plus enzymes and coconut milk for body. Per gram,
KOS sits in the pricier half of our top 10, so call it the dessert
budget.
KOS Organic Plant Protein$21.96 as of Nov 3, 10:38 PM ETCheck price on Amazon →
If you’re strict keto or low-carb, these powders still fit. Pea isolates average 1-2g net carbs per scoop, keeping you far below the 50g/day ceiling that research sets for nutritional ketosis.
Stretch dollars further with timing tricks. Split one scoop post-workout and another with breakfast oats to cover ~40g daily; fill the rest with lentils, tempeh, and seitan. ISSN guidelines cap meaningful gains at ~1.6g/kg, so overshooting wastes powder & money.
Bottom line. Purely Inspired is the cheapest flavored pick, Orgain balances price & fiber, Naked Pea nails minimalism (and wins cost per gram in its 5 lb tub), and KOS turns budget shakes into dessert. Compare cost per gram, not just sticker price, and plant protein stays cheap enough to leave room in your cart for fresh produce.