r/cybersecurity

This subreddit is for discussing cybersecurity topics, research, and emergent threats/findings.

Members: 1,540,360
Created: 2012
Posts a day: 18
Avg comments, top posts this week: 62

r/cybersecurity is a Reddit community with 1,540,360 members, created in 2012. It averaged about 18 new posts a day over the last month. This week's top posts had a median score of 354 and an average of 62 comments each. Security, data and cybersecurity are the words that show up most in recent titles. This month's top posts went up most often around 19:00 UTC, and most often on a Monday.

Only approved members can post in r/cybersecurity.

Data checked October 18, 2026 · Open on Reddit

What people ask

539Why are we just accepting what Anthropic is doing to cybersecurity?152 comments · October 12, 2026
533Why aren’t AI companies charged with any crimes for the hacking done by their AIs?147 comments · September 19, 2026
541How we registered "apple.com"68 comments · October 8, 2026
128Proofpoint to acquire Varonis - is the vision to have all security tooling controlled by a handful of vendors?63 comments · October 15, 2026
1,019How I Could’ve Accessed 17 Trillion Microsoft Records47 comments · September 26, 2026
424Israeli firm used online ads to run vast spy operation, researchers say31 comments · October 15, 2026

Common words in titles

security 8
data 6
cybersecurity 5
hackers 5
linux 4
open 4
through 4
vulnerability 4
warns 4
anything 3
career 3
source 3

Best time to post

19:00 UTC · 4 top posts
11:00 UTC · 3 top posts
18:00 UTC · 2 top posts
Monday · 5 top posts
Sunday · 4 top posts

These are counted from the timestamps of this month's 25 top posts. They show when popular posts went up and don't guarantee reach.

Rules

Read the FAQ before posting
Must be relevant to cybersecurity professionals
No low effort / poor quality posts
Security first / no editorializing
No advertising
No excessive promotion
No personally-identifiable information.
Civility
Ongoing security incidents are to be collated into one thread

How to post in r/cybersecurity without breaking its rules

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Member growth

We started recording r/cybersecurity member counts on October 18, 2026. Growth will show here once we have a few weeks of history.

Get this data from the API

Every number on this page comes from ChatterAPI's Reddit endpoints and is refreshed about once a week. You can pull the same data for any subreddit from your own code or AI agent.

curl "https://chatterapi.com/v1/reddit/subreddits/cybersecurity" \
  -H "Authorization: Bearer $CHATTERAPI_KEY"

{
  "data": {
    "url": "https://www.reddit.com/r/cybersecurity/",
    "name": "cybersecurity",
    "nsfw": false,
    "title": "cybersecurity",
    "createdAt": "2012-05-22T05:07:59.000Z",
    "description": "This subreddit is for discussing cybersecurity topics, research, and emergent threats/findings.",
    "subscribers": 1540360
  },
  "credits": {
    "charged": 2
  }
}

Recorded response, October 18, 2026, trimmed.

Free subreddit stats tool API reference All subreddits we track

Questions about r/cybersecurity

How many members does r/cybersecurity have?

r/cybersecurity had 1,540,360 members when we last checked on October 18, 2026.

How active is r/cybersecurity?

Based on its newest posts, it got about 18 new posts a day over the last month. This week's top posts averaged 62 comments each.

When is the best time to post in r/cybersecurity?

This month's top posts in r/cybersecurity went up most often around 19:00 UTC, and most often on a Monday. That's when popular posts were published, so use it as a starting point, not a rule.

Can I get r/cybersecurity data through an API?

Yes. Call GET /v1/reddit/subreddits/cybersecurity for members, rules and description, and GET /v1/reddit/subreddits/cybersecurity/posts for its posts. Each call costs 2 credits, and new accounts get 100 free credits.