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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 wide selection of products on this page with high or superior Lovi fit levels across multiple skin types, whereas Principia features only a single cleanser with average or lower ratings. Reviewers of The INKEY List frequently mention affordable serums and moisturizers, though some note packaging issues.

What is the difference between The INKEY List and Principia?

The products on this page for The INKEY List include a wide variety of cleansers, serums, and moisturizers with fit levels reaching up to Superior across multiple skin types, whereas Principia features only a single cleanser with average to caution fit levels.

The INKEY List or Principia: which cleanser is better?

For cleansers, The INKEY List offers options like the Salicylic Acid Cleanser which achieves a High fit level for many skin types, whereas Principia features the Gel de Limpeza GL-01 with lower fit levels across similar categories on this page.

Which is more affordable, The INKEY List or Principia?

The products on this page from The INKEY List feature affordable moisturizers and affordable serums, whereas pricing details are not available for Principia on this page.

Which causes fewer breakouts, The INKEY List or Principia?

The products on this page for The INKEY List show varying acne-prone fit levels depending on the specific item, whereas Principia features only one cleanser on this page with a low fit level for acne-prone skin.

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.

What are the common packaging issues reported for The INKEY List products?

Reviewers note that packaging issues are a commonly reported drawback for the products on this page from The INKEY List.

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

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

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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