r/ycombinator
News and discussion around startups and applying to Y Combinator. In 2005, Y Combinator created a new model for funding early stage startups. We invest $500,000 in every startup and work intensively with the founders for three months. For the life of their company, founders have access to the most powerful community in the world, essential advice, later-stage funding and programs, recruiting resources, and exclusive deals.
Members
202,004
202K
Online now
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not captured in the last snapshot
Posts per day
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no sample yet
Comments per post
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no sample yet
Growth · 7d
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not enough history yet
Growth · 30d
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not enough history yet
Promo tolerance
low
read the sidebar rules first
Last post
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no sample yet
Distinct posters
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no sample yet
Tracking since Aug 7 · 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
Similar by content
Communities that discuss what r/ycombinator discusses.
Sharing everything YC related, from what has helped you get in, to Start-Up School and interesting reads from YC Partners / alumni.
Welcome to /r/startups, the place to discuss startup problems and solutions. Startups are companies that are designed to grow and scale rapidly. Be sure to read and follow all of our rules--we have specific places for common content and requests.
###r/Founder is a support network for budding and established Founders. We are in need of active mods! Please PM if you are serious about moderating and are excited about /r/founder! Remember, r/Founder is a restricted community. If you want to be a part of r/Founders simply message a mod! --- ##Please follow the r/Founder rules! 1. Restricted to **actual** founders (PM a mod to be approved) 2. Please list your company in your flair. 3. Focus on personal startup conversations: possible p
Open community to ask questions. We've built a network of real seasoned founders (check out the AMA section) that's actively lurking and answering questions.
Reddit's space to learn the tools and skills necessary to build a successful startup. A community meant to support each other and grow through the exchange of knowledge and ideas. A rising tide lifts all ships in its wake.
See the full lists on similar subreddits.
r/ycombinator — frequently asked
How many members does r/ycombinator have?
r/ycombinator has 202,004 members as of our most recent crawl on Aug 25. 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/ycombinator growing?
We don't have 30 days of snapshot history for r/ycombinator yet, so we're not going to invent a growth number. We've been tracking it since Aug 7; the chart fills in as history accumulates.
How active is r/ycombinator?
We don't have a reliable posting-rate sample for r/ycombinator yet. Subscriber count alone is a poor guide to whether a community is active, so treat this one as unverified until the next sample lands.
Can I promote my product in r/ycombinator?
Our read on r/ycombinator is low promo tolerance. Links and product mentions tend to get removed on sight — earn standing by being useful in threads where you have nothing to gain. Always read the sidebar rules before you post; moderator enforcement is the thing that actually decides.
How do I monitor r/ycombinator for mentions?
Hit Watch on this page. Prowlo starts crawling r/ycombinator 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/ycombinator's stats?
Yes. Everything on this page is one MCP tool call away: catalog_get_subreddit returns r/ycombinator'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