How big is that subreddit, really?

Enter a subreddit. We show how many people visit it each week, how many posts and comments it gets, and the rules its moderators wrote, so you know before you post.

Free, no signup. 15 a day.

How it works

  1. 1

    Enter the subreddit's name, like r/startups, or paste its link.

  2. 2

    We read the numbers Reddit publishes for it and its rules.

  3. 3

    See its weekly visitors and activity, then read the rules before you post.

Size every community in your market at once

Reddit MCP server

One subreddit is a start. With Manifold connected, your agent finds every community where your topic comes up, sizes each one, reads their rules on self promotion, and lists the threads where a reply from you would help.

250 free credits every month. No card.

This pageYour agent with Manifold
SubredditsOneEvery one your topic comes up in
RulesAs writtenRead for you: what each allows on self promotion
ThreadsNot shownNew posts in each, every day
PriceFree1 credit a subreddit
Things to ask

“Find the ten biggest subreddits where people discuss [topic] and tell me which allow self promotion.”

“Compare r/[one] and r/[two] by weekly visitors and activity, and summarise their rules.”

“List this week's posts in r/[subreddit] where someone asks for a tool like ours.”

Questions about the Subreddit stats

Why is there no member count?

Reddit stopped showing member counts in 2025. It now shows weekly visitors and weekly contributions instead, which say more about how alive a community is. Those are the numbers here.

What counts as a contribution?

A post or a comment. Contributions per hundred visitors is a rough measure of how much of the audience joins in rather than reads.

Can I promote my product in a subreddit?

Only where its rules allow it, and many do not. Read the rules shown here before you post; most communities ban accounts that post links without taking part first.

Is the subreddit stats tool free?

Yes. You get 15 lookups a day here, with no signup. For more, connect Manifold to Claude, ChatGPT or Cursor: the free plan gives your agent 250 credits every month, with no card.

When one answer is not enough, ask your agent