Here’s a concise price comparison (U.S. retail) between Iles Formula, Oribe, and Kérastase — with representative product sizes and current retail ranges I found.

Summary (quick):

• Oribe — highest-priced/luxury tier overall (~$49–$66 for typical 8.5 oz shampoos; masks/serums higher). (Oribe.com)
• Iles Formula — mid-to-premium salon pricing, often comparable to Kérastase for standard sizes but with some large “family” or salon refill sizes much more expensive; typical 6.8–6.8 oz bottles ~$40–$54, conditioners ~$50–$78; salon/1L family kits run $166–$462. (bloomingdales.com)
• Kérastase — mid-to-premium salon brand, typical 8.5 oz shampoos ~$34–$43 (retail varies by formula); larger pro sizes (33.8 oz) also available ~$75–$88. (target.com)

Details and examples

• Oribe

  • Oribe Gold Lust Repair & Restore Shampoo — listed at $53 for 8.5 oz on Oribe’s site; typical retail price range seen ~$37–$66 depending on seller and sales. Oribe conditioners and masks are similarly high-priced (mid-$50s–$70s). (Oribe.com)

• Iles Formula

  • Iles Formula Haute Performance Shampoo (6.8 oz / ~200 ml) commonly retailed around $40–$44 at department stores; conditioner ~ $50; finishing serum and other treatments commonly $54–$95. Iles also sells large “family” or 1L professional packs (e.g., shampoo 1000 ml $166, family collections up to $462). Prices vary by retailer and by whether you buy salon-sized/refill kits. (bloomingdales.com)

• Kérastase

  • Kérastase Nutritive Bain (8.5 oz) commonly $34–$43 at mass and specialty retailers; 33.8 oz professional sizes ~$75–$88. Kérastase sits squarely in the premium salon-brand segment but often retails a bit below Oribe on per-ounce list price. (walmart.com)

What this means practically

• Per-ounce, Oribe tends to be the most expensive (brand premium + luxury packaging/fragrance). (Oribe.com)
• Iles Formula and Kérastase are similar in the standard retail bottle range, with Iles often priced on-par with Kérastase for single bottles — but Iles advertises larger professional/family kits (and some higher-priced specialty boosters/serums) that raise average spend if you buy those. (Pellequr.com)
• Sales, seller, and size make a big difference: identical brands can be $10–30+ lower at different retailers or during promotions. Multi-product kits (masks, serums) push the total cost higher for any brand. (walmart.com)

If you want a direct apples-to-apples comparison for a specific product (for example: 8.5 oz shampoo + 6.8 oz conditioner + 5 oz mask), tell me the exact items and I’ll pull current prices from multiple U.S. retailers and give a side-by-side total with links to sources.