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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 and Principia are dedicated skincare brands offering targeted solutions for diverse complexions. The British brand features moisturizers, serums, toners, and eye products built around glycerin, which suits combination and sensitive skin best with standouts like the PHA Toner, Azelaic Acid Serum, and Ceramide Moisturizer. Meanwhile, the second brand provides thoughtful cleansers and precise formulas that favor balanced to oily skin, highlighted by the GL-01 cleanser for acne-prone concerns. While both maintain healthy complexions, they differ through distinct ingredient foundations and tailored skin-type alignments.

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

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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 is a better choice than Principia because the products on this page offer a wide variety of Lovi fit levels across many skin types and concerns, whereas Principia features only a single cleanser with lower fit ratings. Reviewers often mention that The INKEY List provides affordable and hydrating options that work well.

What is the difference between The INKEY List and Principia?

The INKEY List offers a much wider selection of products on this page compared to Principia, which only lists a single cleanser. The INKEY List fits best for combination skin, sensitive skin, and oily acne-prone skin.

The INKEY List or Principia: which cleanser is better?

The products on this page show that The INKEY List offers multiple cleansers with High or Superior Lovi fit levels for various skin types, whereas Principia features a single cleanser with lower fit levels.

Which is more affordable, The INKEY List or Principia?

The products on this page for The INKEY List feature affordable moisturizers and affordable serums as noted by reviewers, whereas affordability details are not mentioned for Principia.

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 enough data on this effect to compare. Reviewers do mention that The INKEY List includes affordable serums and hydrating moisturizers.

When were The INKEY List and Principia founded?

The INKEY List was founded in 2018 in the United Kingdom, while Principia was founded in 2020.

Which brand offers more products for dry skin, The INKEY List or Principia?

The INKEY List offers multiple products on this page with High or Superior Lovi fit levels for dry skin, whereas Principia lists only one cleanser with a Caution fit for dry skin.

Do any products from The INKEY List or Principia contain fragrance?

Every product on this page from 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

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