Dupes for The Ultimate S Serum
by Sulwhasoo · Serum
5 products come close enough to call a dupe, best match first.
How the match is scored
A dupe is always the same kind of product — a serum is only compared with serums. Within that, two things are scored and blended.
Ingredient Match compares the two ingredient lists. Lists are ordered by concentration, so an ingredient near the top counts for more than one near the bottom; a dupe has to cover what matters most in the original. It weighs most of all.
Attribute Match compares what the two products are for: the benefits their ingredients are known for, such as hydrating or acne fighting. Those benefits come from the ingredients, not from tests of either product.
Only products scoring 60% or more are listed, at most 50. A match is about the formula on the label: it can't see concentrations the label doesn't print, texture, or how a product feels on your skin.
Dupe #1
They share 31 of this product's 61 ingredients (the dupe lists 57).
Both are
- Paraben-free
- Sulfate-free
- Oil-free
- Reef-safe
Both are likely good for
- Hydrating
- Barrier Repair
- Reduces Irritation
- Smoothing
- Oil Control
- Pore Refining
- Antioxidant
- Anti-Pollution
Brand price: USD 800.00 · checked 26 Sept 2026 · on the brand's site
Compare side by side →Dupe #2
They share 38 of this product's 61 ingredients (the dupe lists 108).
Both are
- Paraben-free
- Sulfate-free
- Reef-safe
Both are likely good for
- Hydrating
- Barrier Repair
- Reduces Irritation
- Redness Reducing
- Anti-Aging
- Firming
- Smoothing
- Oil Control
- Pore Refining
- Antioxidant
- Anti-Pollution
Brand price: USD 590.00 · checked 26 Sept 2026 · on the brand's site
Compare side by side →Dupe #3
They share 23 of this product's 61 ingredients (the dupe lists 50).
Both are
- Paraben-free
- Sulfate-free
- Oil-free
- Reef-safe
Both are likely good for
- Hydrating
- Barrier Repair
- Reduces Irritation
- Redness Reducing
- Anti-Aging
- Firming
- Smoothing
- Oil Control
- Pore Refining
- Antioxidant
- Anti-Pollution
Brand price: USD 89.00 · checked 26 Sept 2026 · on the brand's site
Compare side by side →Dupe #4
They share 29 of this product's 61 ingredients (the dupe lists 60).
Both are
- Paraben-free
- Sulfate-free
- Reef-safe
Both are likely good for
- Hydrating
- Barrier Repair
- Reduces Irritation
- Redness Reducing
- Anti-Aging
- Firming
- Smoothing
- Oil Control
- Pore Refining
- Antioxidant
- Anti-Pollution
Brand price: USD 215.00 · checked 26 Sept 2026 · on the brand's site
Compare side by side →Dupe #5
They share 21 of this product's 61 ingredients (the dupe lists 39).
Both are
- Paraben-free
- Sulfate-free
- Oil-free
- Reef-safe
Both are likely good for
- Hydrating
- Barrier Repair
- Redness Reducing
- Smoothing
- Oil Control
- Pore Refining
- Antioxidant
- Anti-Pollution
Brand price: USD 130.00 · checked 26 Sept 2026 · on the brand's site
Compare side by side →