Head to head
OI Shampoo vs Nº.4 Bond Maintenance Strengthening Shampoo
Olaplex Nº.4 Bond Maintenance Strengthening Shampoo edges out Davines OI Shampoo, 7.6 to 7.4. It wins on results, formula and community love, while the OI Shampoo is stronger on value.
Benefit fingerprints
What each one does.
Davines OI Shampoo
Olaplex Nº.4 Bond Maintenance Strengthening Shampoo
Side by side
Every detail, compared.
We may earn a commission when you buy through links on this page. It never affects our scores or what we recommend. How we make money
- Hydrating
- Shine
- Frizz control
- Damage repair
- Split ends
- Frizz control
- Shine
- • Dry, frizzy or color-treated medium to coarse hair
- • Fans of a luxurious, scented wash-day experience
- • Pairing with the OI Conditioner or OI Oil
- • Bleached, colored or chemically treated hair
- • Medium to coarse hair that needs softness and shine
- • Anyone already using the Olaplex bond treatments
- Creamy, velvety lather that leaves hair soft and shiny
- Sulfate-free cleansing base
- Signature warm, lingering scent
- Sulfate-free, color-safe cleanse built around Olaplex's patented bond-building ingredient
- Reviewers report softer, shinier and less frizzy hair, especially on bleached or colored lengths
- Concentrated formula; brand says 250 ml lasts up to 100 washes
- Expensive for a daily shampoo
- Can be too rich for fine, low-porosity hair
- $34 for 250 ml is expensive for a daily shampoo
- Some users find it too gentle for oily scalps or heavy product buildup
Affiliate links — we may earn a commission. How we make money
Affiliate links — we may earn a commission. How we make money
FAQ
Quick answers.
Which is better, OI Shampoo or Nº.4 Bond Maintenance Strengthening Shampoo?
Olaplex Nº.4 Bond Maintenance Strengthening Shampoo edges out Davines OI Shampoo, 7.6 to 7.4. It wins on results, formula and community love, while the OI Shampoo is stronger on value.
Which is better value?
Davines OI Shampoo works out to about $4.54 / oz and Olaplex Nº.4 Bond Maintenance Strengthening Shampoo to about $4.02 / oz, based on typical non-Amazon retail prices when we last checked.
How do you score them?
Both are scored on the same five-factor rubric (results, formula & ingredients, texture & experience, value, community love), using the formula or specs, verified creator reviews, community consensus and value. Brands can’t pay for placement.