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The INKEY List vs Principia

Rated by Lovi · Unbiased, science-based skincare AI trained on real user outcomes · How the Fit score works

The INKEY List is a British skincare brand founded in 2018 and owned by Brand Evangelists for Beauty Limited.

cosmeticsbusiness.comprnewswire.comtheinkeylist.comtracxn.com

This page compares some of the most popular The INKEY List and Principia products; for every product of both brands, with a fit score for your own skin, use the Lovi app.

Popular The INKEY List vs Principia products

Questions and answers

The INKEY List or Principia: which is better?

The INKEY List offers a much wider variety of products on this page than Principia, with many items receiving High or Superior fit levels for sensitive, combination, and acne-prone skin types.

What is the difference between The INKEY List and Principia?

The INKEY List offers sixteen products on this page across multiple categories like cleansers, moisturizers, and serums, whereas Principia lists only one cleanser. The products on this page for both brands contain no fragrance.

The INKEY List or Principia: which cleanser is better?

The INKEY List offers multiple cleansers with High Lovi fit levels for various skin types, whereas Principia has only one cleanser listed, which achieves an Average fit for oily skin.

Which is more affordable, The INKEY List or Principia?

The products on this page for The INKEY List feature affordable moisturizers and serums, whereas the single Principia product listed has no pricing information available.

Which causes fewer breakouts, The INKEY List or Principia?

The products on this page for The INKEY List sometimes note purging and breakouts as a side effect, while Principia lacks sufficient data on this point.

When were The INKEY List and Principia founded?

The INKEY List was founded in 2018, and Principia was founded in 2020.

Which brand has more products listed on the page?

The INKEY List has more products listed on the page with sixteen items, whereas Principia has only one.

Do either of the brands include fragrance in their products?

Every product on the pages for both The INKEY List and Principia lists no fragrance in its ingredients.

Research behind their key ingredients

Behind this comparison

Lovi compares products by their fit scores, calculated from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.

  • Nadia Kapleva, MS

    Nadia Kapleva, MS

    Co-founder, Medical Director

    Cosmetic chemist, cosmetologist, aesthetic products developer

  • Alexey Shagraev, PhD

    Alexey Shagraev, PhD

    Co-founder, CEO and CTO

    PhD in computer science, 3x US patent holder, ex-Google, ex-Yandex

  • Dr. Sofía Perea Pérez, MD, MSc

    Dr. Sofía Perea Pérez, MD, MSc

    Medical Board

    Aesthetic medicine practitioner, MSc in Longevity and Anti-Aging Medicine

  • Aishani Shah, MD

    Aishani Shah, MD

    Medical Board

    Specialist dermatologist, MBBS, MD, IFAAD

  • Asya Zubkova, MS

    Asya Zubkova, MS

    Medical Board

    Cosmetic chemist, SCS, IFSCC member

  • Hanna Kurets, MD

    Hanna Kurets, MD

    Medical Board, Medical Advisor

    Dermatology MD

  • Elina Nazarenko, MD

    Elina Nazarenko, MD

    Medical Board

    Dermatology and diagnostic consultant

  • Victoria Derkova, MS

    Victoria Derkova, MS

    Medical Board

    Cosmetic chemist, cosmetic development technologist

How does it fit your skin?

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