r/cybersecurity
Founded May 2012 · Public — anyone can post
This subreddit is for discussing cybersecurity topics, research, and emergent threats/findings.
Members
1,520,722
1.5M
Online now
—
not captured in the last snapshot
Posts per day
—
no sample yet
Comments per post
27.2
Growth · 7d
—
not enough history yet
Growth · 30d
+1.3%
+20K members · ≈33d
Published rules
9
2 mention promotion — quoted below
Last post
—
no sample yet
Distinct posters
—
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
What r/cybersecurity's rules say about promotion
2 of 9 published rules mention promotion, advertising or spam. Quoted from the community's own rules page, not summarised.
No advertising
rule 5 of 9
Want to share information or resources? Please review these guidelines: https://www.reddit.com/r/cybersecurity/wiki/advertising_guidelines You would rather build a relationship with the /r/CyberSecurity community than get banned! Educational articles or blogs that contain advertisement to a service are to flair their posts with "Corporate Blog." Soliciting DMs/calls/etc instead of posting answers directly has been used by marketers to try to circumvent this rule, and may also result in a ban.
No excessive promotion
rule 6 of 9
All promotion (i.e. self-promotion) on this subreddit must be both: * Under 10% of your posts and comments on this subreddit. * Once per week at most per promoted entity. This rule is enforced to curb spam and unwanted promotional posts by non-community-members. We must always be a community member *first*, and self-interested *second*. A full explanation with examples is available on our [wiki](https://www.reddit.com/r/cybersecurity/wiki/rules/promotion).
The other 7
- Read the FAQ before posting
- Must be relevant to cybersecurity professionals
- No low effort / poor quality posts
- Security first / no editorializing
- No personally-identifiable information.
- Civility
- Ongoing security incidents are to be collated into one thread
Read from r/cybersecurity’s published rules on Mar 12. Communities change their rules without notice and enforce requirements (karma, account age, flair) that may live in the sidebar or automod rather than here — the source page is the authority.
Similar by content
Communities that discuss what r/cybersecurity discusses.
A community for beginners and enthusiasts to learn the basics of cybersecurity. Ask questions, share tips, discuss best practices, and stay updated with the latest news on staying safe online.
/r/netsec is a community-curated aggregator of technical information security content. Our mission is to extract signal from the noise — to provide value to security practitioners, students, researchers, and hackers everywhere.
This subreddit is r/techsupport but focused on solving individuals' cybersecurity concerns, removing malware, and more. Please be sure to follow the posting guide for accurate and helpful answers.
Welcome to PWN – your community for hackers and cybersecurity enthusiasts. Discover the latest hacking news, breach reports, and educational resources on ethical hacking. Connect with like-minded ethical hackers and learn new skills in cybersecurity. 👾 Stay sharp. Stay secure.
Welcome to the SOD community! Our focus is to bring together individuals who are passionate about staying informed on the latest threat landscape. Whether you're looking to learn, share your insights, or be a part of a dedicated group working towards a safer online world, you've come to the right place. Be respectful to others, and enjoy the discussions. We look forward to your contributions!
Shared audience
Posters in r/cybersecurity also post in…
/r/netsec is a community-curated aggregator of technical information security content. Our mission is to extract signal from the noise — to provide value to security practitioners, students, researchers, and hackers everywhere.
A reddit dedicated to the profession of Computer System Administration.
Subreddit dedicated to the news and discussions about the creation and use of technology and its surrounding issues.
See the full lists on similar subreddits.
r/cybersecurity — frequently asked
How many members does r/cybersecurity have?
r/cybersecurity has 1,520,722 members as of our most recent crawl on Sep 9. 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/cybersecurity growing?
Over the last ≈33 days r/cybersecurity changed by +1.3% — a gain of 20K members. We compare against the nearest snapshot we actually hold and state the real span rather than rounding it to a clean "30 days".
How active is r/cybersecurity?
We don't have a reliable posting-rate sample for r/cybersecurity 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.
When was r/cybersecurity created?
r/cybersecurity was founded in May 2012 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.
Can I promote my product in r/cybersecurity?
r/cybersecurity publishes 9 rules and 2 of them address promotion. The first, “No advertising”, says: Want to share information or resources? Please review these guidelines: https://www.reddit.com/r/cybersecurity/wiki/advertising_guidelines You would rather build a relationship with the /r/CyberSecurity community than… Read the full rule text on this page and the community's rules page before posting — moderator enforcement is the thing that actually decides.
How do I monitor r/cybersecurity for mentions?
Hit Watch on this page. Prowlo starts crawling r/cybersecurity 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/cybersecurity's stats?
Yes. Everything on this page is one MCP tool call away: catalog_get_subreddit returns r/cybersecurity'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
More free Prowlo tools
Subreddit Finder
Find subreddits by describing your product
Similar Subreddits
Discover related communities
Top Subreddits
The biggest communities we track
Reddit Search Builder
Operators, users, flair and dates
AI Writing Checker
Spot the tells before you post
Comment Humanizer
Make AI comments sound human
Reddit MCP Server
Give your AI agent Reddit access