The Ordinary vs The INKEY List

The same idea, five years apart

The Ordinary’s founding argument was that the skincare industry was selling you chemistry it would not name, at a markup it could not justify. Its answer was to sell the raw active — 10% niacinamide, 7% glycolic acid, 0.5% retinol — in the plainest possible packaging, at a price that made the markup argument self-evident. It worked, and it changed what a budget shelf looks like.

The INKEY List launched into the space that created, and its pitch was a refinement rather than a rebuttal: same transparency, same prices, but a product you would actually enjoy putting on your face. That is the whole difference, and nearly every pairing below is a version of it. The Ordinary optimizes for the lowest possible cost per unit of active. The INKEY List optimizes for the formula you will still be using in six months.

Neither philosophy is correct in the abstract. The one that is correct for you depends on whether you have ever abandoned a product because of how it felt — and most people have.

Pair by pair

Azelaic acid: the clearest result on the page

Both are free azelaic acid at a stated 10% — the form, not a derivative, which is what the published work on rosacea redness, mild acne and post-inflammatory pigmentation actually used. So the active is a tie, and everything is decided by the base.

The Ordinary’s is a silicone cream-gel suspension. It is effective and it is cheap, and a substantial number of people find it grainy, say it balls up under sunscreen, and quietly stop using it. The INKEY List’s SuperSolutions is a lightweight 16-ingredient serum with allantoin, no fragrance and no common allergens, and it absorbs without the drag. Same active, same percentage, and one of them is far more likely to still be in your routine in March. Our azelaic acid explainer covers what the active does and why it is unusually well tolerated.

Niacinamide: a genuine coin flip

A stated 10% each. The only meaningful difference is the second ingredient: The Ordinary adds 1% zinc PCA for oil control, The INKEY List adds a stated 1% hyaluronic acid instead. The zinc is what gives the first one its faintly chalky drag, and it is also the reason some oily skin prefers it.

Two things worth knowing before you buy either. 10% is above the 4–5% most published work uses, so if you are the sort of person who flushes, start lower rather than assuming more is better — the niacinamide percentage guide lays out where the evidence actually sits. And The Ordinary’s is roughly half the price, which at identical stated strength is hard to argue with unless texture has already been a problem for you. The rest of the category is in our niacinamide serum picks.

Glycolic toner: the one place both brands look good

This is the most interesting pairing, because both brands do the rare thing and publish a pH range alongside the percentage. pH is the second number that decides how strong an acid really is, and almost nobody prints it.

The Ordinary is a stated 7% at a published pH of 3.5–3.9, in a 240 mlbottle, with the FDA’s AHA sunburn alert printed in full. The INKEY List is a stated 10% at a published pH range, in a 100 ml bottle, in a more astringent base containing alcohol and witch hazel — and the brand itself says to keep it away from sensitive skin, which we count in its favor as disclosure even as it counts against the product for most readers.

So: more than twice the volume and a gentler formula on one side; a stronger stated acid on the other. For most people the 7% in the 240 ml bottle is the better buy, because a glycolic toner is a product you want to be able to use generously and because starting lower is the best predictor of still exfoliating in three months. Go to the 10% only if you have run a 7% for a while and genuinely plateaued. The glycolic acid percentage guide covers where each strength belongs, and the full field is in our glycolic toner picks.

Hyaluronic acid: disclosure decides it

The Ordinary states 2% hyaluronic acid at low, medium and high molecular weights, plus B5 and ceramides, for a few dollars. The INKEY List sells a multi-weight hyaluronic acid serum built explicitly around a non-tackyfinish — which is the single most common complaint about The Ordinary’s slightly gel-tacky texture, and a legitimate reason to switch.

But the 30 ml listing publishes no percentage. INKEY labels its larger 60 ml version 2%, and we are not going to carry that number across to a different size on its behalf. Against a competitor that states 2% and adds ceramides and B5 for less money, an unstated figure loses. Buy the INKEY one if the tackiness has genuinely stopped you using a humectant serum; otherwise the answer here is the cheap one. Either way, apply it to damp skin and seal it with moisturizer — a humectant with nothing to hold onto can work against you in dry air.

Retinoid: not close

The Ordinary sells a retinol at a stated 0.5% in squalane, in a range that also offers 0.2% and 1% so you can step up deliberately. That is the whole argument for buying a retinoid from a budget brand: you know the dose, so you can change it on purpose.

The INKEY List’s Starter Dual Retinol is a sensible-looking product — two retinoid forms, barrier ingredients in the same bottle, explicitly sold to beginners — and it publishes no strength at all. “Dual-retinol complex” is a phrase, not a measurement. For the one category where the number governs everything about how the product behaves, that is a real loss, and it is the clearest case on this page of a brand not living up to its own founding premise. If you want the gentler route into retinoids, our beginner retinol picks get you there with a labeled dose, and retinol strengths explained covers what each number does.

The category The Ordinary does not play in

The INKEY List makes a cleansing balm: a 150 ml tub built on a stated 5% oat kernel oil, aimed at skin that finds most first cleanses too much. The Ordinary has never been a serious first-cleanse brand, because a cleansing balm is a formulated product rather than an active in a base, and formulating is the thing The Ordinary deliberately leaves to you.

That is a fair summary of the whole comparison, actually. Where the job is “deliver a known dose of a known molecule,” The Ordinary is hard to beat and usually cheaper. Where the job is “make something that works pleasantly on a face,” The INKEY List is the one that took that problem seriously. The balm sits alongside the rest of the field in our cleansing balm roundup.

How to split your basket

Buy The Ordinary for: hyaluronic acid, retinol, niacinamide if price matters more than feel, and the glycolic toner if you want volume and a gentler acid. In each case you are buying a published number at the lowest price anyone offers it.

Buy The INKEY List for: azelaic acid, the cleansing balm, niacinamide if the zinc version has annoyed you, and the glycolic toner only if you have outgrown a 7%. In each case you are paying a small premium for a formula that is nicer to live with.

The rule underneath all of it:when the active’s dose decides the outcome, buy the brand that prints the dose. When the texture decides whether you keep going, buy the one that solved the texture. Nothing about mixing them causes a problem — just introduce one product at a time, and watch that you are not running two exfoliating acids or two of the same active without noticing.