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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 that achieve High or Superior Lovi fit levels across most skin types, whereas Principia features only a single cleanser with lower ratings. Reviewers of The INKEY List frequently mention the brand's affordable and hydrating moisturizers.

What is the difference between The INKEY List and Principia?

The INKEY List offers a wide variety of fragrance-free products on this page spanning cleansers, toners, serums, and moisturizers with fit levels reaching Superior for specific skin types, whereas Principia features only a single cleanser with average to low fit levels across skin types.

The INKEY List or Principia: which cleanser is better?

When comparing cleansers, the products on this page from The INKEY List feature options like the Salicylic Acid Cleanser, which has a High Lovi fit level for combination, acne-prone, oily, and sensitive skin, whereas Principia only lists the Gel de Limpeza GL-01, which has an Average fit for those same skin types.

Which is more affordable, The INKEY List or Principia?

The INKEY List features affordable serums and affordable moisturizers among the products on this page, whereas Principia does not mention affordability.

Which causes fewer breakouts, The INKEY List or Principia?

Reviewers note that some products on this page by The INKEY List sometimes cause purging and breakouts. No breakout data is available for the products on this page by Principia.

When were The INKEY List and Principia founded and where?

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

Do products from The INKEY List and Principia contain fragrance?

Every product on the INKEY List page and the Principia page lists no fragrance in its ingredients.

How does the Lovi fit level of The INKEY List's Caffeine Eye Cream compare across different skin types?

The Lovi fit level of The INKEY List's Caffeine Eye Cream reaches Superior for dry and acne-prone skin, while it remains High for dry sensitive, sensitive, dark spots, mature, oily acne-prone, and combination skin, and drops to Average for oily skin.

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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