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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 offers a much wider variety of products on this page than Principia, covering more skin types with favorable Lovi fit levels. Reviewers often mention its affordable, hydrating, and lightweight moisturizers.

What is the difference between The INKEY List and Principia?

The INKEY List offers a wide variety of products on this page featuring fragrance-free formulas and key ingredients like glycerin, whereas Principia features only a single cleanser on this page.

The INKEY List or Principia: which cleanser is better?

When comparing cleansers, the products on this page show that The INKEY List offers options like the Salicylic Acid Cleanser, which has a High fit for combination, oily, and sensitive skin, whereas Principia only features the Gel de Limpeza GL-01, which has an Average fit for those skin types.

Which is more affordable, The INKEY List or Principia?

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

Which causes fewer breakouts, The INKEY List or Principia?

The products on this page for The INKEY List and Principia do not have comparative breakout data to determine which causes fewer breakouts, although shoppers sometimes note purging and breakouts with The INKEY List.

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 on this page, The INKEY List or Principia?

The INKEY List offers more products for dry skin on this page, providing sixteen options compared to Principia's one. The products on this page for The INKEY List range from Superior to Caution in Lovi fit levels for dry skin.

Do products from The INKEY List contain fragrance?

Every product on this page from The INKEY List 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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