Syncly Social Index
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Hair
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Redken vs Kérastase on video, September 2026
Kérastase had more than twice Redken's September videos (919 vs 393) and scored 65.6 vs 28.3 on the Syncly Social Index. 73 videos named both, almost one in five Redken videos. In the 40 we read, 14 praised both, 2 leaned Redken and none leaned Kérastase.
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Side by side
Kérastase ranked 2nd in hair and Redken 10th. Kérastase led on share of voice (77.8 vs 11.1), momentum (44.4 vs 0; share up 16.2% from August while Redken fell 13.9%), high reach (77.8 vs 22.2; 4.9% vs 3.3% of videos over 100K views) and creator breadth (77.8 vs 22.2). Untagged reach scored 100 for both (34.8% vs 27.3% of sampled videos named the brand without tagging it). Sentiment scored 0 for both, with 29.5% vs 28.8% organic positive. The Syncly Social Index measures attention and reaction in social video and does not test how well a product works.
Syncly Social Index metrics, September 2026. The higher value in each row is bold.
| Redken | Kérastase | |
|---|---|---|
| SSI score | 28.3 | 65.6 |
| Videos (month) | 393 | 919 |
| Change in share vs. last month | −14% | +16% |
| Untagged mentions | 27% | 35% |
| Positive (organic videos) | 29% | 30% |
| Videos with 100k+ views | 3.3% | 4.9% |
| Creator breadth | 92% | 95% |
When creators compare them
14 of 40 praised both. One Spanish-language creator would buy the Kérastase mask and Redken shampoo "again and again", katekalli credits Redken Extreme Length and a Kérastase duo for her damaged hair, and a dermatologist rated Kérastase Bain Satin and Redken Acidic Bonding 9/10 each. Two leaned Redken: kelsielynnxoxo calls Redken All Soft her "holy grail" while her Kérastase night serum "stopped working", and miafranzgelicka is unsure about Kérastase Genesis and eyeing Redken next. 24 only used or listed both.
Which one creators prefer in videos that mention both
Videos that compare them
Which one to choose
Choose Redken if you want what these creators use it for: a daily leave-in or concentrate (shanice_1820, kritiisachan), All Soft or Extreme for dry or damaged lengths (kelsielynnxoxo, katekalli), or Amino Mint for an oily scalp (isabellakatee). Choose Kérastase if you want a mask or the Gloss line for shine (buganvilialand, bbylaceyxoxo) or a night or Genesis serum (becca_foggia). Two videos found a Kérastase serum underwhelming.
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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.