Syncly Social Index
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Skincare
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Medicube vs COSRX on video, September 2026
Medicube had 12,731 short videos in September 2026 and COSRX 3,567. Medicube ranks third on the Syncly Social Index for skincare at 67.5 and COSRX ninth at 38.9. 372 videos named both, and in the ones we read creators layered them in routines far more often than they compared them.
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Side by side
Medicube leads on share of voice (100 vs 55.6), momentum (100 vs 77.8), sentiment (50 vs 0), high reach (22.2 vs 0) and creator breadth (66.7 vs 33.3). 56% of Medicube's organic sampled videos were positive, against 45% for COSRX, and Medicube's share of beauty video grew 44.5% from August against 27.8%. They tie at 50 on untagged share (18% vs 15%). The index measures video presence, not product quality.
Syncly Social Index metrics, September 2026. The higher value in each row is bold.
| Medicube | COSRX | |
|---|---|---|
| SSI score | 67.5 | 38.9 |
| Videos (month) | 12,731 | 3,567 |
| Change in share vs. last month | +45% | +28% |
| Untagged mentions | 18% | 15% |
| Positive (organic videos) | 56% | 45% |
| Videos with 100k+ views | 2.4% | 1.8% |
| Creator breadth | 97% | 96% |
When creators compare them
Of 40 sampled videos that mention both brands, 36 made no comparison. Most were routines that used Medicube pads or serum and COSRX snail mucin, like this storytime routine, plus gifted hauls and K-beauty events. The 4 that judged both were skeptical more often than not. An invest-or-pass review passed on both the Medicube PDRN Pink Peptide Serum and the COSRX Snail 96 Mucin Essence, saying the hype is bigger than the evidence. A peptide serum tier list put COSRX's 6 Peptide Booster and Medicube's Pink Peptide Serum at the bottom for low peptide doses. One sun stick roundup rated sticks from both brands worth buying.
Videos that compare them
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Frequently asked questions
Benchmark your brand against competitors
The Syncly Social Index scores brands from 0 to 100 using short-form video on TikTok, Instagram Reels and YouTube Shorts. It combines six signals: video share of voice (25%), untagged mentions (20%), momentum (15%), sentiment (15%), high-reach videos (15%) and creator breadth (10%). Each signal is scored relative to the other brands in the same category for the month. Sentiment and untagged figures come from a sample of videos; any claim about a specific video links to that video.