about · the argument
Consensus, counted.
Every dupe list on the internet is somebody's opinion — an editor's pick, a retailer's catalogue, one blogger's afternoon. dupology is a count. It reads what people already said to each other about which fragrances smell like which, and ranks the answers by how many of them said the same thing.
The two bad options
The confident guess
Ask a language model for a dupe and it will answer immediately and well. It will also be doing a surface-level search: a skim of the loudest, most repeated pages, rendered as prose. It reads like knowledge. Nothing in it tells you how many people actually agreed, or lets you go and check.
The endless scroll
So you go to the source and search Reddit yourself. The answer really is there — but it is scattered across years of threads that disagree with each other, buried under jokes and half-memories. The honest outcome of an hour of this is usually more confusion than you started with.
A count, not an opinion
Nothing here is an editorial judgement. The number next to an alternative is arithmetic over what people wrote.
Ask a model
You get a fluent, confident answer that sounds researched. Underneath it is a surface skim of whatever was easiest to find, with no way to see who said it or how many people agreed.
Ask Reddit
The answer is genuinely in there, spread across a decade of threads that contradict each other. An hour of scrolling usually leaves you less certain than when you started.
Ask here
The same threads, counted. A ranking is how many separate people independently made the same claim — and each claim still points at the comment that made it.
Whole threads — not stray comments — are read for claims of the form “X is a dupe for Y”, together with the comment that made the claim and a verbatim quote from it. A claim is only kept if that quote really appears in that comment, which is what keeps invented pairings out. Claims are then pooled across threads, and an alternative is shown at all only once at least two different people have named it. Nothing is worked out while you wait; the answer already exists when you search for it.
Why you can't vote here
There is no upvote button, no star rating, no “rank these yourself”. That is not a missing feature. The consensus this site is about has already happened — tens of thousands of people argued it out, at length, in public, years before anyone built a page for it. Asking a handful of visitors to re-rank the same fragrances would replace a large, slow, honest sample with a small and easily skewed one.
So the job is reading, not collecting. The site's only opinion is that a claim made independently by forty people is worth more than the same claim made once — and it shows you the count so you can disagree with it.
Try it on something you own.
search a fragrance