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Brand vs brand

Olaplex vs K18: price, claims and ads

Olaplex vs K18: price per mL and what each brand says its treatment does, then how Olaplex and K18 sell on Facebook and Instagram.

Olaplex logo

vs

K18 logo

The short answer

Olaplex's N°.3PLUS costs far less per mL on its own site ($34 for 100 mL) than K18's Leave-In Molecular Repair Hair Mask ($75 for 50 mL), and they are used differently: Olaplex is a 3-minute pre-shampoo treatment, K18 a 4-minute leave-in. Olaplex advertises with offers; K18 with stories and before-and-afters.

Olaplex vs K18, from their own sites

Each brand's bond-repair hair treatments as its own product page shows them. Prices are list prices; claims are the brand's own words.

Olaplex's product page for N°.3PLUS Complete Repair Treatment, 100 mL, at $34, on a phone

Olaplex

N°.3PLUS Complete Repair Treatment (100 mL)

$34 · $0.34 per mL

  • "A 3-minute pre-shampoo treatment"

  • "3X stronger hair*" (its asterisk)

  • Protein-free; free of SLS/SLES

  • Use every 1 to 3 washes

A 250 mL jumbo size is also sold.

Olaplex's product page
K18's product page for the Leave-In Molecular Repair Hair Mask, 50 mL, on a phone

K18

Leave-In Molecular Repair Hair Mask (50 mL)

$75 · $1.50 per mL

  • "4-minute leave-in treatment to reverse hair damage"

  • K18PEPTIDE "clinically proven to repair damage from bleach + color, chemical services and heat*"

  • Rated 4.7 from 9,589 reviews on its page

Also sold as a 15 mL mini ($29) and a 100 mL jumbo ($120).

K18's product page
MeasureOlaplexK18
ProductN°.3PLUS Complete Repair Treatment (100 mL)Leave-In Molecular Repair Hair Mask (50 mL)
List price$34$75
Size100 mL50 mL
Price per unit$0.34 per mL$1.50 per mL

Per mL, K18's mask costs over four times as much as Olaplex N°.3PLUS.

How each brand advertises

Each brand's best Facebook and Instagram ads, picked on performance, and a page they open. Tap an ad to see it in Meta's Ad Library.

Olaplex logo

Olaplex ads

Its best ads open with one clear claim or put the offer first, then send shoppers to the collection the ad names.

K18 logo

K18 ads

Its best ads open with a question or name the problem first, then send shoppers straight to the product in the ad.

What a store owner can learn

Three moves from Olaplex vs K18 you can copy without their budget.

  1. 1

    Lead with the deal when the product is known

    Many Olaplex ads open with the offer, often an extra 20% off every shampoo and conditioner. Shoppers who know the brand only need a reason to buy now.

  2. 2

    Lead with proof when the price is high

    Many K18 ads open with a first-person story, a customer quote or a before-and-after. A $75 treatment needs someone else saying it worked.

  3. 3

    Send the ad to your own store

    Some K18 ads send shoppers to Sephora. The ad still sells, but the sale, the customer and the data belong to the retailer.

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Frequently asked questions

Is Olaplex or K18 cheaper?
Olaplex, by a wide margin per mL. On each brand's own site, N°.3PLUS is $34 for 100 mL ($0.34 per mL) and K18's leave-in mask is $75 for 50 mL ($1.50 per mL). They are used differently, so compare by uses too.
How are Olaplex N°.3PLUS and K18 used?
By each brand's own page: Olaplex N°.3PLUS is a 3-minute treatment applied to wet hair and rinsed before shampoo. K18's mask is a leave-in treatment that works in 4 minutes after washing.
What kind of ads do Olaplex and K18 run?
Olaplex's ads lead with offers, such as an extra 20% off shampoo and conditioner, and change often. K18's lead with proof: customer stories, quotes and before-and-after photos. Both brands' ads are shown above.
Where do K18's ads send shoppers?
Mostly to K18's own pages, but some go to Sephora. One image ad titled "record-breaking hair repair" reads "For breakthrough results, K18 mask gets molecular. Available now at Sephora." and sends shoppers to Sephora.

Keep exploring

See every brand ad page or ad hook examples by type.

Prices and claims are quoted from each brand's own product page, which we captured.

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