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Find the subreddits where products like yours get shared

Based on product links posted in online communities over the last 131 days. Pick a category to see its rooms.

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How the ranking is built

Every community here earned its place the same way: people posted links to real products in it. We resolve those links to products, classify each product into one of the categories below, and then ask a single question of every room. Out of everything this community links, how much of it belongs to this category?

Topic focus is that share, damped. We divide the products of one category by the room's whole product catalogue plus a fixed fifty, so a room with thirty products of a category cannot leapfrog a room with twelve hundred just by being small and narrow. The printed number is always lower than the raw share, and the smaller the room the further below it sits. Read it as a rank, not as a percentage. The word printed beside it places the room against every other room we publish, which is the only scale that number has.

What Focus is not is a volume count, and that is the other half of the design. Ranked by sheer number of links, the top of a category is almost always a referral exchange: one marketing room in this dataset carries sixty thousand links spread across forty three distinct products. It is the loudest room in its category and the least useful one to post in. Focus asks how concentrated a room is instead, and that puts the practitioners first.

Why the founder communities are not first anywhere

There is a familiar set of rooms where people building software announce what they built. They contain an enormous number of product links, and they are the default answer to where should I post. In this ranking none of them leads a single category.

That is not a filter. It falls out of the measure. Those rooms link products from every category at once, so no single category owns a large share of them, and their Topic focus stays low everywhere. Meanwhile a room dedicated to one workflow spends almost all of its product talk inside one category and rises. The rooms you get here are the ones where the conversation is already about your kind of product, rather than the ones where people announce products in general.

What this page does not tell you

It does not tell you how many people are in a room. That number does not exist anywhere in our data, and no column here is a stand in for it. What we count is links and the accounts that posted them.

It does not tell you a room's rules. The arrival column on each category page is behavioural: it reports the share of links that showed up inside a post rather than cited in a comment. A room where that share is zero is a room where nobody has ever successfully posted a product link, which usually means a rule, but we are reading outcomes rather than a rulebook.

It does not tell you whether a room is worth your time for reasons other than product talk. The ranking reads what gets linked, so a room organised around resale, streaming or referral swapping can rank high in its category on numbers that are perfectly real. Read the list as a shortlist to check, not as a recommendation.

And it does not tell you which products were found in a room. That is the paid part of PulsePeek, and it is the only thing here that is. The rest of the page is free and needs nothing from you, no account and no email.

See the products, not just the rooms

The rooms are free. Which products the radar found inside each one is the paid part of PulsePeek, and it is the difference between a room that fits your product and a room that already has one.

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Questions, answered

What this tool measures, and what it does not

A way to answer where should I post without guessing. Instead of searching community names for a keyword, you pick the category your product belongs to and get the communities where products of that kind actually get linked, ranked by how much of the room's product talk falls in that category.

We do not classify communities at all. We classify products, using the same taxonomy across the whole catalogue, and a community rises in a category when a large share of the products linked inside it belong to that category. It is a behavioural measure, not a label somebody assigned to the room.

Because volume rewards the wrong rooms. Sorted by link count, the top of most categories is a referral exchange or a bot feed. Focus asks how concentrated a room's product talk is, which surfaces the rooms where people discuss one kind of product on purpose.

We do not know, and we will not guess. Subscriber counts are not in our data and no column here stands in for one. The numbers you see are product links posted since we started measuring, and the count of separate accounts that posted them.

The lists are free and need no account. One thing is held back: which products the radar found inside each community. Seeing them is what a PulsePeek subscription is for. Nothing else on this page is gated.