r/Costco
Fulfilling Your Bulk Needs Since 1983
Founded May 2010 · Public — anyone can post
Welcome to Costco, we love you. This is an unofficial Costco subreddit, r/Costco is not affiliated with Costco Wholesale Corporation or any of their subsidiaries. **Please review our subreddit rules prior to posting.** Posts that don’t follow subreddit rules may be subject to removal. AutoModerator (bot) sometimes sends posts to a queue to be reviewed, but all posts will be reviewed by a human. Do NOT re-submit. If you’re unable to post or comment, please message Moderators via ModMail.
Members
1,637,774
1.6M
Online now
—
not captured in the last snapshot
Posts per day
12.1
from the last 100 posts, spanning 8.2 days
Comments per post
—
no sample yet
Growth · 7d
—
not enough history yet
Growth · 30d
—
not enough history yet
Promo tolerance
—
not assessed yet
Last post
Oct 9
sampled Oct 10
Distinct posters
100%
of the last 100 posts
Tracking since Oct 10 · growth spans are the real distance between snapshots, not rounded windows. Posts/day is measured from the community’s own newest posts on Reddit, not from what Prowlo happens to crawl.
Member growth
Tracking since Oct 10 — growth charts appear after a week of history.
Similar by content
Communities that discuss what r/Costco discusses.
For Canadians who share a mutual love for anything Costco. This subreddit is a fan-club, not an official Costco platform.
Unofficial subreddit for fans of Aldi (world wide chain of grocery stores). Disclaimer: not official, sponsored, or affiliated with Aldi. This is a grocery store subreddit, please leave hate, and politics in other subs.
r/CommunityBuyerCenter is a general discussion space for practical questions, useful experiences, buying notes, and everyday recommendations.
A place to exchange stories about your daily experiences in brick & mortar retail.
See the full lists on similar subreddits.
r/Costco — frequently asked
How many members does r/Costco have?
r/Costco has 1,637,774 members as of our most recent crawl on Oct 10. Prowlo re-checks tracked communities on a rolling schedule, so this figure moves rather than sitting frozen at whatever it was when a scraper last ran.
Is r/Costco growing?
We don't have 30 days of snapshot history for r/Costco yet, so we're not going to invent a growth number. We've been tracking it since Oct 10; the chart fills in as history accumulates.
How active is r/Costco?
Around 12.1 posts per day, measured from the newest 100 posts on Reddit, which span 8.2 days. Posting rate matters more than subscriber count when you're deciding where to spend your time — it determines how long your comment stays visible.
When was r/Costco created?
r/Costco was founded in May 2010 and is a public — anyone can post community. Age matters: an older community with steady growth has survived Reddit's moderation churn; a young one with a spike may not.
Who posts in r/Costco?
Of the last 100 posts we sampled, 100% came from distinct accounts; the newest was published Oct 9. A low share means a feed dominated by a handful of accounts (bots, mods, or one prolific poster) rather than a community.
Can I promote my product in r/Costco?
We don't have a promo-tolerance read for r/Costco yet. Default to the safe approach: read the sidebar rules, contribute in threads where you gain nothing, and mention your product only when it is the honest answer to someone's question.
How do I monitor r/Costco for mentions?
Hit Watch on this page. Prowlo starts crawling r/Costco into your Dataset — every new post indexed and embedded, searchable semantically, queryable by your AI agent over MCP, and able to trigger keyword alerts in Slack. Prowlo is read-only; it never posts on your behalf.
Can my AI agent read r/Costco's stats?
Yes. Everything on this page is one MCP tool call away: catalog_get_subreddit returns r/Costco's members, growth, promo tolerance and similar communities as typed JSON — free, no credits. Connect your agent to api.prowlo.com/mcp and it can vet the community and start watching it in the same conversation.
Read-only · Human-in-the-loop
Prowlo never posts for you
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