When it comes to reparative haircare products, Ouai and Olaplex are two of the most popular brands out there.

Both brands offer a range of high-quality products that promise to transform your hair and leave it looking and feeling healthy and beautiful. But which brand is better for your hair needs?

In this Ouai vs Olaplex comparison post, I’ll discuss several products from both brands to help you decide which products are right for your hair.

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Ouai vs Olaplex

Hair Concern vs Hair Type

If your hair is very damaged and in need of repair, Olaplex’s products will probably be the best option for you. Olaplex products work to strengthen and restore damaged hair with their patented bond-building molecule.

Olaplex is well known for their No.3 Hair Perfector, a concentrated hair treatment that is formulated to restore and revive hair that has been damaged due to chemical processes, heat styling, and environmental stressors.

Please note that Ouai (pronounced “way”) does not have a corresponding product that matches the reparative best-seller Olaplex No. 3 but does have effective hair masks for deeper conditioning treatments.

Ouai has formulated their daily hair care products based on hair type: thin, medium, or thick, and does not offer products specifically for damaged hair.

Yet their daily haircare products will help promote overall hair health and help repair breakage and split ends.

Fragrance

While both brands fragrance their products, Ouai’s products are heavily fragranced.

The Ouai products I tried contain three different fragrances: Melrose Place, Mercer Street, and Bondi Beach. I thought Mercer Street, found in Ouai’s shampoos and conditioners, was the strongest and quite perfume-like.

If you don’t love a strong fragrance, I would suggest trying a sample first before purchasing the larger-size Ouai products.

All Olaplex products contain the same citrus fragrance.

Pricing

Both brands are considered luxury or high-end haircare brands, and you’ll pay a premium price for their products.

The product lines are priced similarly. While Ouai’s products tend to be slightly more expensive, ounce for ounce, Ouai’s products are more affordable.

Keep in mind that Olaplex takes a science-based approach to their formulas and has patented proprietary technology, which no doubt has been incorporated into their pricing.

Product Comparisons

We’ll start the comparisons with shampoos, then move to conditioners and hairs masks, and finish with styling products: leave-in stylers and dry shampoos.

The first Ouai shampoo vs Olaplex comparison we’ll do is more specialized: clarifying shampoos. Ouai’s Detox shampoo is a cult favorite for removing buildup and impurities from the hair, so we’ll see how Olaplex’s clarifying shampoo compares:

The concentrated formula is perfect for when you’ve been using a lot of dry shampoo or have been dealing with build-up from styling products (that would be me!).

Chelating agents remove hard water deposits and other impurities.

This deeper cleanse is excellent for oiliness or a dry, flaky scalp. Use it in place of your regular shampoo weekly or when you feel like you need a deeper cleanse.

The shampoo contains Olaplex’s Melrose Place fragrance, a rose fragrance with notes of bergamot, lychee, cedarwood, and white musk.

This is my favorite Oaui product for its immediate clarifying effects on my hair.

Detox Shampoo is safe for all hair types, including color-treated, keratin-treated, and Brazilian blowouts.

It contains Olaplex’s patented ingredient, bis-aminopropyl diglycol dimaleate, to repair broken bonds in your hair while removing impurities that can damage it.

The shampoo pairs Olaplex’s patented Bond Building Technology with a Broad Spectrum Clarifying System to achieve clean hair and scalp while restoring shine and adding volume to your hair.

Panthenol and amino acids add moisture and nourishment. It is designed to provide softness and vibrant color clarity with every use.

This once-weekly shampoo removes excess oil, product buildup, chlorine, hard water minerals, heavy minerals, and other pollutants while maintaining hydration in your hair.

Excellent for dull, oily, dry, and discolored hair.

Olaplex No.4C Bond Maintenance Clarifying Shampoo contains Olaplex’s signature uplifting citrus scent.

If you have damaged and are looking for a clarifying shampoo to repair and strengthen your hair, Olaplex Nº.4C Bond Maintenance Clarifying Shampoo is the way to go.

Otherwise, Ouai’s Detox Shampoo leaves hair feeling super clean, soft, and refreshed. The nice part is that it has a light rose floral scent and doesn’t smell so much like apple cider vinegar.

Users also love Ouai for dandruff and an itchy scalp.

The shampoo is formulated with a blend of keratin and kumquat extract, plus babassu and coconut oils to help nourish and protect the hair.

The strong fragrance of Ouai’s Medium Hair Shampoo is the Mercer Street scent with notes of Italian lemon, Turkish rose, jasmine sambac, iris, lily, and white musk.

The shampoo is safe for color-treated hair, chemically-processed hair, keratin, and Brazilian blowout-treated hair, extensions, wigs, and synthetic hair.

Ouai also offers a Fine Hair Shampoo that strengthens, hydrates, and adds volume and bounce to dry hair and a Thick Hair Shampoo that hydrates, repairs, and reduces frizz.

This shampoo is designed to be used as part of the multi-step Olaplex system but can also be used on its own with other haircare products.

Formulated for all hair types, Bond Maintenance Shampoo contains Olaplex’s patented bond-building technology that uses the molecule bis-aminopropyl diglycol dimaleate to repair and protect hair from future damage.

The shampoo repairs and protects against damaged tresses, split ends, and frizz by re-linking the broken disulfide bonds in your hair.

Sodium hyaluronate (hyaluronic acid) hydrates, while sunflower seed oil, apricot kernel oil, and panthenol moisturize your hair.

Vitamin E, rosemary leaf extract, and other plant extracts offer antioxidant benefits. The result is shinier, more manageable, stronger hair with reduced hair breakage.

This color-safe shampoo has a thick texture and Olaplex’s signature citrus scent. It leaves hair feeling clean but not stripped, just silky and soft.

Olaplex also offers two additional shampoos formulated with Olaplex’s bond-building technology, a clarifying shampoo, Nº.4C Bond Maintenance Clarifying Shampoo, previously discussed, and a reparative shampoo for blonde hair, No. 4P Blonde Enhancer Toning Shampoo.

However, the key difference between the two is that Olaplex’s formula is specifically designed to repair and protect hair from damage, while Ouai’s formula is geared towards hydration and nourishment.

If you have damaged hair that needs repair, Olaplex’s Bond Maintenance Shampoo is the better choice. But if you have medium hair that doesn’t necessarily need damage repair but rather hydration and added shine, Ouai’s Medium Hair Shampoo is a great option.

If you have fine or thick hair, Oaui also offers shampoos specifically formulated for those hair types.

The Bottom Line: If you prefer shampoo based on hair type (fine, medium, thick), Ouai will be the better choice. For damage and hair loss due to breakage, Olaplex will be the better choice.

The hydrating conditioner contains a blend of keratin for strengthening, babassu and coconut oils for nourishment, and kumquat extract for shine.

Like the Medium Hair Shampoo, this conditioner contains a strong scent: Ouai’s Mercer Street fragrance, which includes notes of Italian lemon, Turkish rose, jasmine sambac, iris, lily, and white musk.

The conditioner is safe for color-treated hair, chemically-processed hair, keratin, and Brazilian blowout-treated hair, extensions, wigs, and synthetic hair.

Ouai also offers conditioners for other hair types, such as their Fine Hair Conditioner, which hydrates, strengthens, and adds thickness and bounce to dry hair, and a Thick Hair Conditioner that hydrates, repairs, adds shine, and reduces frizz.

Bond Maintenance Conditioner uses the active ingredient bis-aminopropyl diglycol dimaleate along with other nourishing ingredients to re-link the broken disulfide bonds in your hair to repair damage from the inside out.

Panthenol, green tea seed oil, Crambe abyssinica seed oil, avocado oil, grape seed oil, and sunflower seed oil moisturize, while hyaluronic acid hydrates.

The result is stronger, healthier, smoother hair that’s less likely to tangle or break. This conditioner does a great job of controlling frizz and adding shine, and it’s gentle enough to use on color-treated hair.

If you’re looking for a fragranced conditioner based on your hair type (fine, medium, or thick) that provides hydration and shine and helps repair split ends, Ouai’s Medium Hair Conditioner is a great choice.

If you’re looking for a conditioner that specifically targets repairing and strengthening damaged hair, Olaplex No. 5 Bond Maintenance Conditioner is the way to go.

Olaplex conditioner uses the same bond-building technology as the Olaplex shampoo to repair and protect hair from future damage.

This reparative mask fights split ends and strengthens hair while leaving it soft and silky. It contains a blend of ingredients such as shea butter, panthenol, and hydrolyzed keratin to provide hydration, nourishment, and protection.

Additional active ingredients include coconut water, which is filled with vitamins, minerals, and moisturizing amino acids.

Antioxidants like ginger root, carrot root, and rosemary leaf extracts protect hair from environmental stress. Gluconolactone, a polyhydroxy acid, gently exfoliates the scalp.

The Fine To Medium Hair Treatment Mask has a floral fragrance that comes from Ouai’s Melrose Place scent that contains notes of rose, bergamot, lychee, cedarwood, and white musk.

The mask has a creamy yet lightweight consistency that melts into your hair. Use it in place of your regular conditioner after shampooing.

Leave it on for a minimum of five minutes before being rinsed off. You can also use it as an overnight hair mask.

If you have thick hair, Ouai also offers Thick Hair Treatment Masque, which contains almond, macadamia, and olive oils, shea and illipe butters, and hydrolyzed keratin to restore shine, strengthen, and hydrate thick hair types.

This highly concentrated hair mask is formulated to repair and protect damaged hair while adding hydration and intense moisture.

It has a lightweight consistency that absorbs deeply without weighing your hair down.

Olaplex’s analogy compares this hair mask to skincare: consider No. 8 the moisture mask you use on your skin weekly but for your hair instead.

It uses a combination of Olaplex’s signature bond-building technology, the molecule bis-aminopropyl diglycol dimaleate, along with a blend of nourishing and conditioning ingredients such as hyaluronic acid (sodium hyaluronate), arginine, and ceramides.

It moisturizes with panthenol, rose hip seed extract, amino acids, hemp seed oil, avocado oil, meadowfoam seed oil, squalane, safflower seed oil, and rice bran oil.

The mask is designed to be used as a weekly hair mask instead of your regular conditioner. Simply apply it to damp hair, comb through, and leave on for a minimum of 10 minutes before rinsing it out.

Olaplex No. 8 Bond Intense Moisture Mask is scented with Olaplex’s signature fresh, citrus fragrance.

If your hair is damaged and in need of repair, Olaplex’s hair mask is the better choice, as it is specifically designed to repair and protect damaged hair.

Also, if your hair is extremely parched, straw-like, and in need of moisture, Olaplex Bond Intense Moisture Mask is specifically designed to be a deep infusion of moisture.

Ouai’s hair mask is better suited to those that want a product formulated for your hair type. It leaves your hair soft and silky and tames the frizz.

It’s also important to consider fragrance preferences when choosing between the two brands. Ouai products have a much stronger scent, so keep this in mind if you are sensitive to fragrance.

Ouai is more expensive, but you get 8.8 oz compared to the Olaplex mask’s 3.3 oz.

Excellent for dry hair, this leave in conditioner offers thermal protection from heat damage (up to 450°F/232°C). A pretty impressive statistic that Oaui notes is that when used with heat, it reduces hair breakage by 52%.

The spray contains moisturizing amino acids and panthenol, along with baobab seed, evening primrose, and argan oils. Tamarind seed extract hydrates while hydration to your hair hydrolyzed proteins protect against damage. Vitamin E protects against UV rays.

The spray fights frizz, repairs dry ends, and adds slip to hair, which makes it easier to detangle. The lightweight spray also protects against UV damage.

It’s also great for thick, coarse, and curly hair since it hydrates when applied to dry hair. It also boosts shine and controls flyaways.

Leave In Conditioner is scented with Oaui’s North Bondi fragrance (inspired by Sydney’s Bondi Beach), which is a blend of rich florals and sheer white musk with notes of bergamot, Italian lemon, rose de mai, and violet.

The concentrated cream speeds up blow dry time while smoothing frizz and flyaways for up to 72 hours. It also works great on air-dried curls.

It contains moisturizing panthenol plus plant oils, including grape seed, sunflower, and coconut oil, along with antioxidants vitamins C and E. Panthenol and aloe vera provide additional moisture.

This Olaplex mask also contains a small amount of Olaplex’s patented bond-building molecule, bis-aminopropyl diglycol dimaleate.

This styling product is ideal for all hair types, including dry, grey, colored, and chemically treated hair and hair textures from coily to fine hair.

The styling cream is fragranced with Olaplex’s signature citrus scent.

Ouai has a much lighter feel, while Olaplex feels a little heavier and more noticeable in your hair.

Olaplex is great for frizz, while Oaui is an excellent heat protector.

Both are fragranced, but once again, Oaui has a more noticeable scent.

Both are similarly priced, but Ouai is 4.7 oz while Olaplex is 3.3 oz.

This dry shampoo also contains panthenol and Rhodiola rosea extract to nourish and strengthen your hair while adding volume and texture.

The dry shampoo does leave a white cast, BUT once it is rubbed and blended into your hair, it disappears quickly.

Ouai notes that the white cast is their blend of rice starch, volcanic minerals, and Rhodiola rosea extract working to absorb, detoxify, and soften hair.

Letting the dry shampoo sit in your hair for about 30 seconds allows it to do its job, especially if your hair is super oily.

The dry shampoo is scented with Ouai’s Melrose Place rose fragrance.

TIP: Focus on your roots and scalp first, then brush Super Dry Shampoo through the mid-shaft and ends. A blow dryer can even help blend and distribute it throughout your hair.

What makes it stand out in the sea of dry shampoos is that Olaplex uses dry cleansing technology, so the dry shampoo feels weightless, and your scalp and hair don’t feel weighed down, powdery or stiff.

Olaplex dry shampoo doesn’t contain talc like many dry shampoos but uses ultra-fine rice starch to mattify and absorb oil. It won’t leave any white powdery residue and won’t clog your pores, which is very helpful if you have an oily scalp.

Like every other Olaplex product, it contains Olaplex’s patented Bond Building Technology that put them on the map.

This technology features the ingredient bis-aminopropyl diglycol dimaleate, which helps to strengthen weak and broken disulfide bonds in your hair.

This dry shampoo spray also contains Rambutan seed extract for antioxidant protection and detoxification, oil-absorbing bentonite clay, the mineral zeolite to absorb oils, odors, and impurities (great for oily, greasy hair), and cetrimonium chloride to control frizz and flyaways.

Olaplex repairs hair damage from the inside out, resulting in stronger, shinier, healthier hair with reduced breakage and split ends.

This Olaplex hair product is perfect for brittle, damaged, dry, and frizzy hair. Olaplex technology repairs hair damage from chemical treatments, hot tools, styling, aging, and even environmental damage.

It’s formulated for every hair type. Read more about this Olaplex product in my Olaplex Dry Shampoo review post.

Ouai does leave a white residue, but it can be blended out.

They’re both fragranced: Ouai with their Melrose Place rose fragrance and Olaplex with their signature citrus fragrance.

I tend to get more uses and extend my time in between wash days with Olaplex since it doesn’t leave any buildup on my hair. (I also prefer Olaplex’s fresher fragrance.)

About Olaplex

Founded in 2014 by husband and wife Dean and Darcy Christal, Olaplex is a haircare brand that focuses on repairing damaged hair.

Olaplex products are formulated with a patented ingredient called Bis-Aminopropyl Diglycol Dimaleate, which works by re-linking the broken disulfide bonds in your hair.

Disulfide bonds can be damaged during thermal, mechanical, and chemical services, such as when you bleach, perm, or straighten your hair, as well as other factors like environmental stress and aging.

Broken disulfide bonds create damaged, dry, brittle hair. By re-linking these bonds back together, bis-aminopropyl diglycol dimaleate can help to restore the strength, structure, and integrity of your hair and repair hair damage.

Olaplex technology works at a molecular level and provides immediate results. It improves hair strength and prevents future breakage for shiny, healthy hair with improved resilience.

Olaplex products are commonly used in salons but can also be purchased for at-home use.

Olaplex created their Olaplex Bond Maintenance System, a multi-step at-home system, to work on all hair types to restore strength, structure, and integrity to damaged hair.

The Olaplex at-home system includes several products:

• No. 0 Intensive Bond Building Hair Treatment
• No. 3 Hair Perfector
• No. 4 Bond Maintenance Shampoo
• No. 4P Blonde Enhancer Toning Shampoo
• No. 4C Bond Maintenance Clarifying Shampoo
• No. 5 Bond Maintenance Conditioner
• No. 6 Bond Smoother
• No. 7 Bonding Oil
• No. 8 Bond Intense Moisture Mask
• No. 9 Bond Protector Nourishing Hair Serum

You may have noticed that Steps 1 and 2 are missing from the list above. Olaplex Steps No. 1 and No. 2 are in-salon services.

Olaplex products are vegan and cruelty-free and do not contain parabens, phthalates, sulfates (SLS & SLES), gluten, or phosphates.

About Ouai

Ouai was founded by celebrity hairstylist Jen Atkin in 2016. The brand aims to make luxury hair care accessible with its high-quality, effective hair products.

Ouai is a socially-driven brand that uses social media to help drive product development and launch new product releases.

The brand offers a range of daily haircare products, including shampoos, conditioners, and hair treatments, as well as styling products like leave-in conditioners, hair oil, hair spray, and dry shampoo.

Ouai has formulated their daily haircare products based on hair type: thin, medium, or thick hair (i.e., Ouai Fine Hair Shampoo and Conditioner).

Ouai also offers haircare supplements for thicker, fuller hair, less shedding, and optimal hair growth.

Ouai also offers body care products, including body cleansers, scrubs, and creams, plus hand wash and lotions.

Fragrance is an integral part of the Ouai product experience, so much so that Ouai now offers Ouai de parfums, which are fragrances inspired by the brand’s favorite cities.

They bottled up best-selling scents found in their hair and body products and created fragrances you can wear as your everyday scent.

Ouai products are cruelty-free, gluten-free, paraben-free, SLS and SLES-free, and phthalate-free.

Ouai vs Olaplex: The Bottom Line

Both Olaplex and Ouai offer effective hair care products, but the best brand for you will depend on your specific hair needs.

If your hair is damaged and needs repair, Olaplex’s products may be a better fit for you since their proprietary bond-building technology targets hair damage.

If you’re looking for daily haircare products based on your hair type that promote overall hair health, Ouai might be the better option.

It’s also worth noting that Ouai’s products are heavily fragranced (often borderline perfume-like), while Olaplex’s products have their signature citrus scent.

Regardless of which brand you choose, it’s essential to prioritize hair health and select products that work for your hair type and needs.

Thanks for reading!