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Side by side

Ouai Fine Hair Conditioner vs Ouai St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner

75% function match · 5 of the 10 functions we compared match Formula overlap 33%. Ouai Fine Hair Conditioner and Ouai St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner share 4 ingredients among each other's most prominent.

Based on your consultation

Which of these fits your hair?

We check your pattern, moisture need, scalp, fragrance tolerance, weight sensitivity and more against each formula — and say which one lines up.

Your profile at a glance

  • Your answers appear here
  • Your answers appear here
  • Your answers appear here
  • Your answers appear here

When each one is the right call

What each formula is built for, from its own ingredient list.

  • Fine Hair Conditioner — maximum slip
  • St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner — protein-sensitive hair

Side by side

Every trait, aligned

One row per trait, read from each product’s own ingredient list and record. A dash means we have not researched that field for that product — it is not a “no”.

Trait
Ouai Fine Hair Conditioner — 10 oz container Ouai

Fine Hair Conditioner

  • Conditioner
  • Masstige
  • Sulfate-free
  • Moisture-rich
Ouai St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner — 6 oz container Ouai

St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner

  • Conditioner
  • Salon
  • Sulfate-free
  • Protein-free
Price, size & price per ounce
$16–20 10 oz · $1.60/oz
$32 6 oz · $5.33/oz
Value / price positioning
Upper-mid price for a conditioner $$$$$ Masstige tier · costs more than 50% of the 689 conditioners we’ve priced
Same job for less elsewhere $$$$$ Salon tier · costs more than 92% of the 689 conditioners we’ve priced
Best for hair types
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
All types Nothing in the formula or the claims narrows this to one pattern. Your hair
Moisture level Same
Moderate Humectants in the working part of the formula. Your hair
Moderate Humectants in the working part of the formula. Your hair
Oils and butters Differs
Low Oils are present, but low enough to be a finishing touch. Your hair
Moderate Oils sit high in the list — a softening, coating formula. Your hair
Slip / detangling Same
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
Weight on hair Differs
Light Water-first and light: unlikely to flatten fine hair. Your hair
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Fragrance
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. Your hair
Prominent Fragrance sits in the first eight ingredients — a larger share of the formula. Your hair
Protein Differs
Minor Protein appears, low enough to be a supporting ingredient. Your hair
None No protein or amino acids in the list. Your hair
Silicone / wax buildup Same
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
Clarifying wash needed
High Your hair
High Your hair
Hard-water defence Differs
None No chelating agent in the list. Your hair
Chelators present Chelators are present — they bind hard-water and pool minerals. Your hair
Formula completeness
out of 10
Complete for its job
out of 10
Complete for its job
Who should choose this
  • Maximum slipfor hair that tangles the moment it is wet
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Fine hairthat flattens under most products
  • Cuticle-smoothing pHa pH adjuster brings it to the acidic range hair prefers
  • Protein-sensitive hairthat stiffens when protein is added
  • Maximum slipfor hair that tangles the moment it is wet
  • Very dry hairno fast-drying alcohol in the list
  • Cuticle-smoothing pHa pH adjuster brings it to the acidic range hair prefers
Why you might skip it
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Very dry or damaged hairit contains fast-drying alcohol
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Hair that needs proteinthere is none in this list
from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.
More facts about each one
Type
Conditioner
Conditionerspray
Line
OUAI Fine Hair
—
Where to buy
Brand website
Brand website · Specialty beauty
Free of
  • sulfate-free
  • sulfate-free
  • protein-free
Vegan
Not vegan · ingredient list
—
Cruelty-free
Cruelty-free · brand states
Cruelty-free · brand states
Scent
Scented, not described
Scented, not described
How often
—
as needed

Facts as we recorded them. A dash means we have not researched that field for that product — it is not a "no".

The bottom line

The bottom line depends on your hair

Which of these two suits you is a question about your hair, not about them. The consultation answers it — and tells you what your routine needs around it.

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The detail behind the table

Where the readings above come from: the ingredient lists themselves, each brand’s claims checked against them, what owners report, and cost per ounce in context.

Shared and distinct ingredients

Shared and distinct ingredients

Computed from the ingredient lists as printed. "Shared" means both lists carry it; where it sits on each label is stated, because position is what tells you how much.

What both formulas carry

IngredientFine Hair ConditionerSt. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner
Water
Neutral
#1Leading
#1Leading
Cetearyl Alcohol
Softens
#2Leading
#3Leading
Behentrimonium Chloride
Detangles
#3Leading
#29Below the 1% line
Fragrance
Fragrance
#4Below the 1% line
#4Below the 1% line
Cetrimonium Chloride
Detangles
#5Below the 1% line
#27Below the 1% line
Panthenol
Detangles
#6Below the 1% line
#12Below the 1% line
Glycerin
Moisturizes
#7Below the 1% line
#28Below the 1% line
Benzyl Salicylate
Fragrance
#29Below the 1% line
#49Below the 1% line
Limonene
Fragrance
#30Below the 1% line
#55Below the 1% line

What only one of them carries

Fine Hair Conditioner

St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner

Full ingredient list — Fine Hair Conditioner (31)
Full ingredient list — St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner (58)

Claims check

What each brand says, against what each formula shows

Claims are quoted from each brand. We only mark one supported, partly supported, or conflicting when that product’s ingredient list actually speaks to it.

VerdictsFine Hair ConditionerSt. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner
Supported
1
1
Partly supported
0
0
Stated by brand
0
4
Potential conflict
0
0

Fine Hair Conditioner

  • This lightweight conditioner for fine hair is infused with keratin, biotin, and chia seed oil to strengthen and volumizeSupportedLeaves room for lift.

St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner

  • 2.7x less breakageStated by brandOnly the brand’s testing shows this.
  • 72-hour frizz controlSupportedSmoother strands, less frizz.
  • 12x easier to detangleStated by brandOnly the brand’s testing shows this.
  • Reduces breakage by 52% when used with heatStated by brandOnly the brand’s testing shows this.
  • Heat protection up to 450°F/232°CStated by brandOnly lab testing can show this.

What owners say

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings, and we never balance one product’s themes against another’s by inventing them.

Both praised for the scent. Ouai St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner draws complaints about the scent.

Fine Hair Conditioner

Several reviewers note visibly shinier, healthier-looking hair

Reviewers describe hair as soft, silky, and healthier-feeling after use

Refill pouch format praised for value/convenience by repeat buyers

repeat purchasers

Fragrance called out as a standout, most-cited positive theme

Some reviewers comment on texture/feel of the product itself in addition to hair results

St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner

the St. Barts fragrance itself is a recurring reason reviewers say they repurchase or prefer this scent variant

general reviewers on the Ulta PowerReviews corpus

reviewers describe easy detangling with a light, even spray application, calling out knots melting out with a few spritzes

general reviewers on the Ulta PowerReviews corpus

many reviewers say the leave-in leaves hair noticeably softer and smoother, especially on dry or damaged hair

reviewers with dry or damaged hair on the Ulta PowerReviews corpus (102 reviews)

a minority of reviewers with fine, straight hair report the product does little for them despite liking the scent

reviewers who self-identified as having fine, straight hair

Price check

Cost per ounce, in context

Cost per ounce against every product of this type we have priced, each at the size it is most often sold in. Value labels are computed from that percentile and from how many products that do the same job cost less; they are comparisons, not judgements about a brand.

$1.60/oz vs $5.33/oz — Ouai St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner costs about 3.3× more per ounce than Ouai Fine Hair Conditioner.

$0.09/oz median $1.60/oz $56.25/oz $1.60/oz Fine Hair Conditioner $5.33/oz St. Barts Conditioning Det

Every mark sits on one distribution because these are compared against the same set: 689 conditioners with a computable unit price.

Value readFine Hair ConditionerSt. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner
Label
Upper-mid price for a conditionerSits in the middle of the range for conditioners per ounce.
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.

Computed from cost per ounce against every product of this type we have priced, and from how many products that do the same job cost less. It is a comparison, not a judgement about the brand.

Compare with something else

Close formulas to each of these, as their own comparison pages.

Fine Hair Conditioner vs Curl Conditioner Coconut OilHask · 93% function matchSt. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner vs TRESemme Color Revitalize Conditioner for Color-Treated HairTRESemme · 98% function matchFine Hair Conditioner vs Scalp ConditionerSachajuan · 93% function matchSt. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner vs TRESemme Bouncy Curls Conditioner for Curly HairTRESemme · 98% function matchFine Hair Conditioner vs Honey Hibiscus Slip ConditionerTaliah Waajid · 93% function matchSt. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner vs Moroccan Infusion Shine ConditionerSuave · 98% function matchFine Hair Conditioner vs The Protector Color Protect + Strengthen Conditioneramika · 93% function matchSt. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner vs Pro-V Miracles Extreme Damage ConditionerPantene · 98% function match

Fine Hair Conditioner · St. Barts Conditioning Detangling and Frizz Fighting Leave Conditioner · All conditioners in the library

How this page was made

  • This page is assembled from the same researched records the individual product pages render: identity, each ingredient list as printed, each brand's own claims, dated price observations, and review themes written in our researchers' own words. Nothing on it is written per comparison.
  • We do not rank these against each other. Which of them suits you depends on your hair, and that is what the consultation works out.
  • The formula similarity percentage is a stored, precomputed number: position-weighted overlap of the two ingredient lists blended with agreement on the attributes we derive. It measures how alike two formulas are, not how well either works.
  • The value band is a fixed label over two stored numbers: this product’s cost per ounce as a percentile of every product of this type we have priced, each at the size it is most often sold in, and how many products we score as doing the same job cost at least a quarter less per ounce.
  • The "Is this right for you?" panel reads only your own consultation answers, and it applies exactly the filters our recommendation engine applies. It is computed when you load the page and is never stored on it.
  • 8 sources were consulted across the products on this page.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice. We do not sell these products and take no placement fees.
  • This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.

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