Brand Comparison
TIAM vs COSRX
A head-to-head comparison of two popular K-beauty brands. Which one is right for your skin?
Our Pick
COSRX
Higher editor rating (9 vs 7.5)
Rating7.5/109/10
Price RangeBudget ($)Budget ($)
Founded20152013
OriginSeoul, South KoreaSeoul, South Korea
Products531
Best Forall skin types, beginner, dullOily, Combo, Acne-Prone, Sensitive
PhilosophyGentle, dermatologist-developed skincare with a focus on potent vitamin C formulations and barrier-friendly formulations.Minimal, effective formulations at accessible prices. Every product built around one or two proven actives with short, transparent ingredient lists.
TIAM
TIAM is the approachable alternative to more aggressive vitamin C brands. The My Signature C Source is one of the best entry-level L-ascorbic acid serums you can buy — effective without being irritating. A solid pick for anyone new to actives.
Pros
- ✓ Gentle L-ascorbic acid formulations
- ✓ Dermatologist-developed
- ✓ Affordable and widely available
- ✓ Good starter vitamin C
Cons
- ✗ Not as potent as specialist vitamin C brands
- ✗ Packaging is functional, not premium
- ✗ Smaller catalog
COSRX
The gateway brand for most people entering K-beauty, and for good reason. COSRX consistently delivers effective, no-frills products at prices that make most Western alternatives look overpriced. Their snail mucin line and BHA products are genuine category leaders. They rarely innovate, but they execute the basics exceptionally well.
Pros
- ✓ Outstanding value across the entire range
- ✓ Short, transparent ingredient lists
- ✓ Consistently effective formulations
- ✓ Widely available globally
Cons
- ✗ Packaging is utilitarian, not luxurious
- ✗ Rarely pushes boundaries with new ingredients
- ✗ Some products have a faint tea tree scent
