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Allies of Skin vs Principia

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

Allies of Skin and Principia are thoughtful skincare brands offering targeted solutions for diverse complexions. Allies of Skin provides restorative moisturizers, serums, and eye products featuring niacinamide that suit dry, sensitive, and uneven skin best, whereas Principia offers precise cleansers and targeted formulas suited for balanced to oily skin. Both brands address specific concerns with standout items like the Molecular Saviour Probiotics Treatment Mist and the Gel de Limpeza GL-01 for acne-prone skin, while differing in their primary ingredient focus and ideal skin types.

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

Popular Allies of Skin vs Principia products

Questions and answers

Allies of Skin or Principia: which is better?

Allies of Skin offers a much wider range of products on this page with High to Superior Lovi fits across many skin types, whereas Principia only features a single cleanser with Average to Caution fits. Reviewers note that Allies of Skin provides gentle and hydrating formulas, though some mention initial skin reactions and a high price point.

What is the difference between Allies of Skin and Principia?

Allies of Skin offers a much wider range of serums, moisturizers, and eye products on this page, whereas Principia is represented only by a single cleanser. Reviewers note that Allies of Skin provides gentle, effective moisturizers and calming serums, but mention that it carries a high price point and may cause initial irritation.

Which is more affordable, Allies of Skin or Principia?

Principia offers a much more affordable option with its cleanser, whereas Allies of Skin features a higher price point across the products on this page.

Which causes fewer breakouts, Allies of Skin or Principia?

Allies of Skin offers multiple products on this page with High to Superior Lovi fit levels for acne-prone skin, whereas Principia has only one cleanser on this page which rates Low for acne-prone skin. Reviewers note that Allies of Skin can occasionally cause initial irritation and skin reactions.

Which brand has been on the market longer, Allies of Skin or Principia?

Allies of Skin has been on the market longer because it was founded in 2016, whereas Principia was founded in 2020.

Do any products from Allies of Skin or Principia contain fragrance in their ingredients?

No, every product on this page for both Allies of Skin and Principia lists no fragrance in its ingredients.

Which brand offers more product options on this page, Allies of Skin or Principia?

Allies of Skin offers more product options on this page, featuring multiple serums, moisturizers, and treatments compared to Principia's single cleanser.

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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