Best Subreddits for Cybersecurity (2026): 16 Ranked
Best subreddits for cybersecurity in 2026, ranked by subscriber count. See member totals, self-promo ratings, and posting tips for all 16 communities. Reddit is where cybersecurity professionals share threat intelligence, career advice, and technical knowledge in real time. From breaking vulnerability disclosures to certification study guides, these communities offer practical insights that textbooks simply cannot match. The anonymous nature of Reddit also means professionals can share candid experiences about the industry.
The largest cybersecurity community on this list is r/hacking with 2,970,000 members. 0 of the 16 are rated High for self-promotion, 3 Medium and 13 Low, so check the tolerance column before you post a link. Member counts change daily, so open each community to see the live figure.
9.9M
Combined members
16
Communities
r/hacking
Largest
Promo tolerance
The ranking
Top 16 Cybersecurity Subreddits, Ranked by Members
Every community on this list, sorted by member count, with its self-promotion tolerance and the content it rewards.
| Rank | Subreddit | Members | Self-promo | Best content type |
|---|---|---|---|---|
| #1 | r/hacking | 2,970,000 | Low | Tutorials, tools, and CTF writeups |
| #2 | r/privacy | 1,600,000 | Low | News, tool recommendations, and guides |
| #3 | r/cybersecurity | 1,490,000 | Low | News, career advice, and discussions |
| #4 | r/sysadmin | 1,300,000 | Low | Best practices and troubleshooting |
| #5 | r/netsec | 550,000 | Low | Research, tools, and vulnerability analysis |
| #6 | r/networking | 445,000 | Low | Technical questions and architecture advice |
| #7 | r/crypto | 345,000 | Low | Research, papers, and technical discussions |
| #8 | r/CompTIA | 304,000 | Low | Study guides and exam experiences |
| #9 | r/AskNetsec | 258,000 | Low | Questions and detailed answers |
| #10 | r/ReverseEngineering | 176,000 | Low | Analysis writeups and tools |
| #11 | r/SecurityCareerAdvice | 109,000 | Low | Career advice and experience sharing |
| #12 | r/Malware | 100,000 | Low | Malware analysis and detection techniques |
| #13 | r/oscp | 90,200 | Low | Study guides and exam experiences |
| #14 | r/bugbounty | 80,000 | Medium | Writeups, tips, and program reviews |
| #15 | r/blueteamsec | 69,600 | Medium | Detection rules, tools, and guides |
| #16 | r/redteamsec | 51,300 | Medium | Techniques, tools, and operation writeups |
Read this first
What Marketers Get Wrong About Cybersecurity on Reddit
Security pros are extremely skeptical of marketing language. Credibility requires technical depth, named CVEs, and acknowledging the limits of any vendor pitch.
Marketing speak like "next-gen" or "AI-powered" without architecture detail gets you flagged and removed by mods.
Threat analysis or detection writeup with sample queries, IOCs, and what false positives to expect
Title templates
Post Title Templates That Work in Cybersecurity Subreddits
Steal these openers verbatim. Each one mirrors a thread pattern that consistently passes the early-vote filter in cybersecurity communities.
- 1
“My first successful bug bounty writeup. $750 payout, took 40 hours. Here's the math and whether it was worth it.”
Honesty about the hourly rate (around $18/hr) is exactly what r/bugbounty needs more of. The sub is full of survivorship bias. Posting the honest math attracts people who've had the same experience and drives a real discussion about whether bug bounty is a sustainable career path.
- 2
“Ran a red team engagement for a mid-sized fintech. The biggest vulnerability wasn't technical.”
r/netsec loves the social engineering angle when it comes from a real engagement rather than a hypothetical. 'Wasn't technical' is the hook that pulls in both the social-engineering crowd and the defenders who want to know what to patch.
- 3
“Passed the OSCP on my second attempt. Here's what I got wrong the first time.”
OSCP failure-and-retry posts consistently outperform first-attempt success posts on r/cybersecurity because they give the reader something actionable. The second-attempt structure forces specific retrospection.
- 4
“Security team asked me to audit our own company's phishing resilience. Here's what I found and what we did next.”
Internal audit framing is relatively rare on the sub and comes across as practitioner content rather than vendor content. The 'what we did next' promise means it's not just diagnosis, it's a playbook.
Avoid removals
3 Mistakes That Get Cybersecurity Posts Removed
These are the patterns mods in cybersecurity subs flag fastest. Spot them in your own draft before you hit post.
Posting your 'security tool' in r/netsec or r/cybersecurity as a product launch
Both subs treat vendor content as noise. Security professionals have seen hundreds of tools claiming to catch what existing tools miss. A launch post without a technical explanation of the detection method gets removed by mods or buried within an hour. r/netsec in particular runs most vendor submissions through stricter scrutiny than almost any other technical subreddit.
Instead: Write a post about the specific attack surface or detection gap your tool addresses. Show the research. If your tool found something, show the methodology. The tool mention lives in the comments or your profile. Let the research carry the post.
Asking the sub how to hack a specific system you don't own
This gets permabanned. r/hacking and r/netsec have zero tolerance for unauthorized access questions, even when framed as hypothetical or educational. Mods have seen every variation of this framing.
Instead: Use CTF platforms like HackTheBox, TryHackMe, or PicoCTF for hands-on practice. When you do post about technique, frame it around a specific CTF box or a CVE analysis, both of which are legitimate research contexts the sub welcomes.
Cross-posting the same security news to r/cybersecurity and r/netsec
The audiences overlap substantially and frequent cross-posters get recognized and flagged. More importantly, the two subs have different expectations: r/netsec wants technical depth, r/cybersecurity accepts industry news. The same post rarely serves both well.
Instead: Decide which sub fits the content and post once. If it's a CVE disclosure with technical detail, that's r/netsec. If it's an industry news story with career implications, that's r/cybersecurity. Cross-posting the same link without adaptation signals you're broadcasting, not contributing.
Founders on Reddit
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After you find the subreddits
Found your Cybersecurity subreddits? Now post without getting removed
A list of subs is step one. MediaFast turns it into a daily plan: which sub, which post, which thread to comment in, all checked against each community's rules.
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Field note, cybersecurity subreddits
The security researcher who landed a $180K job by documenting a CVE on r/netsec
A mid-level penetration tester discovered a privilege escalation vulnerability in an open-source VPN client during a client engagement. After responsible disclosure and patch release, he wrote a detailed breakdown of the discovery process and posted it to r/netsec: the recon steps, the specific binary analysis, the PoC, and why the patch worked. The post got 1,400 upvotes. Three months later, the head of security at a cloud company reached out because the post had come up in a team meeting about hiring researchers who could explain their work clearly.
Takeaway
In security, writing about what you found matters almost as much as finding it. r/netsec rewards the explainer as much as the researcher. The post becomes a technical writing sample that travels further than any resume.
Community by community
How to Post in Each Cybersecurity Subreddit
Same order as the ranking above. What each community is about, what it rewards, and one tip before your first post.
A large community covering ethical hacking, penetration testing, and security research. Despite the name, the subreddit focuses on legal and ethical security practices.
Best content type
Tutorials, tools, and CTF writeups
Posting tip
Share CTF writeups with detailed explanations of your methodology, not just the solution.
A massive community focused on digital privacy, surveillance, and data protection. Discussions cover privacy tools, browser configurations, VPNs, and privacy legislation around the world.
Best content type
News, tool recommendations, and guides
Posting tip
Share practical privacy guides with step by step instructions that non technical users can follow.
The main cybersecurity subreddit covering news, career discussions, and industry trends. A good mix of technical content and professional development topics for security practitioners.
Best content type
News, career advice, and discussions
Posting tip
Share actionable security insights or career advice backed by your own professional experience in the field.
While primarily for system administrators, security is a major topic here. Discussions cover firewall configurations, patch management, incident response, and enterprise security architecture.
Best content type
Best practices and troubleshooting
Posting tip
Share security hardening guides or incident response procedures that system administrators can implement immediately.
A technically focused subreddit for information security professionals. Content centers on vulnerability research, exploits, security tools, and defensive techniques. High quality moderation keeps content relevant.
Best content type
Research, tools, and vulnerability analysis
Posting tip
Share original research, CVE analysis, or open source security tools with technical depth and proper attribution.
Covers computer networking fundamentals and enterprise networking, which overlaps significantly with network security. Topics include firewalls, VPNs, routing protocols, and network architecture.
Best content type
Technical questions and architecture advice
Posting tip
Include network diagrams and specific configurations when asking questions or sharing solutions.
Focused on cryptography (not cryptocurrency), covering encryption algorithms, protocols, implementation security, and academic research in the field of cryptographic systems.
Best content type
Research, papers, and technical discussions
Posting tip
Share analysis of cryptographic protocols or implementations with mathematical rigor and practical context.
Focused on CompTIA certifications including Security+, Network+, and A+. Members share study resources, exam experiences, and career transition stories.
Best content type
Study guides and exam experiences
Posting tip
Share detailed study plans with specific resources and time commitments that helped you pass your certification exams.
A question and answer subreddit specifically for information security questions. Members ask about tools, techniques, career paths, and security architectures.
Best content type
Questions and detailed answers
Posting tip
Provide thorough, well structured answers to security questions and recommend specific tools with context on when to use them.
Dedicated to reverse engineering software, malware analysis, and binary exploitation. Highly technical content covering disassembly, debugging, and protocol analysis.
Best content type
Analysis writeups and tools
Posting tip
Share malware analysis reports or reverse engineering walkthroughs with clear methodology and tool recommendations.
Specifically focused on cybersecurity career questions, including how to break into the field, salary negotiations, certification paths, and career transitions from other IT roles.
Best content type
Career advice and experience sharing
Posting tip
Share your specific career path including timeline, certifications, and salary progression to help others plan their journey.
Focused on malware analysis, detection, and prevention. Members share analysis of new malware strains, detection techniques, and reverse engineering findings.
Best content type
Malware analysis and detection techniques
Posting tip
Share malware analysis reports with IOCs (indicators of compromise) and detection signatures that defenders can use.
The community for the Offensive Security Certified Professional certification, one of the most respected penetration testing certifications. Members share study strategies and exam preparation tips.
Best content type
Study guides and exam experiences
Posting tip
Share your OSCP preparation timeline, lab completion strategy, and exam day tips without revealing specific exam content.
The community for bug bounty hunters sharing tips, writeups, and experiences with vulnerability disclosure programs. Members discuss platforms like HackerOne and Bugcrowd.
Best content type
Writeups, tips, and program reviews
Posting tip
Share detailed bug bounty writeups that explain your reconnaissance process and how you identified the vulnerability.
Dedicated to defensive security (blue team) topics including SIEM, threat hunting, incident response, and security operations. A valuable resource for SOC analysts and security engineers.
Best content type
Detection rules, tools, and guides
Posting tip
Share detection queries, SIEM rules, or threat hunting playbooks that other blue team members can use directly.
Covers offensive security and red team operations including penetration testing techniques, C2 frameworks, and evasion strategies. Content is highly technical and practitioner focused.
Best content type
Techniques, tools, and operation writeups
Posting tip
Share offensive security techniques with proper context about detection and how blue teams can defend against them.
Self-promotion
Understanding Self-Promotion Tolerance
Each subreddit has its own culture around self-promotion. Knowing the tolerance level before posting helps you avoid bans and build genuine credibility.
High Tolerance
These communities welcome product mentions and project sharing as long as you follow subreddit rules. You can include links to your product in posts and comments, but genuine value should still come first.
On this list (0)
None of the 16 communities.
Medium Tolerance
Self-promotion is allowed in specific threads or under certain conditions (like designated weekly threads). Read the sidebar rules carefully. Build some post history before sharing your own products or content.
On this list (3)
Low Tolerance
These subreddits strictly prohibit self-promotion. Focus on providing value through comments and educational posts. Build karma and credibility first. Mention your product only when directly asked for recommendations.
On this list (13)
Go further
Find Even More Subreddits for Your Cybersecurity Product
This list covers the top communities, but there are hundreds more niche subreddits where your target audience hangs out. The subreddit finder from MediaFast analyzes your product and matches you with the most relevant communities, including hidden gems most marketers miss.
Related lists
Explore Related Subreddit Lists
Watch
Watch Before You Post in Cybersecurity Communities
A quick tour of the subreddits programmers actually use to learn, ask questions, and follow industry discussion. Watch "Top SubReddits You Must Follow to Learn Programming | Reddits for Programmers | SCALER #shorts" by SCALER.
Video by SCALER on YouTube
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Cybersecurity Subreddits FAQ
11 questions about finding and using the best cybersecurity communities on Reddit.
r/hacking is the largest community on this list with 2,970,000 members. A large community covering ethical hacking, penetration testing, and security research. Despite the name, the subreddit focuses on legal and ethical security practices.
This list ranks 16 cybersecurity subreddits by member count, from r/hacking (2,970,000 members) down to r/redteamsec (51,300 members). Together they add up to 9,938,100 members, counted per community, so people who joined several are counted more than once.
Here is how the 16 communities on this list rate for self-promotion. Medium tolerance (designated threads or conditions): r/bugbounty, r/blueteamsec and r/redteamsec. Low tolerance (no self-promotion): r/hacking, r/privacy, r/cybersecurity, r/sysadmin, r/netsec, r/networking, r/crypto, r/CompTIA, r/AskNetsec, r/ReverseEngineering, r/SecurityCareerAdvice, r/Malware and r/oscp. Rules change, so read each subreddit's sidebar and pinned posts before you share a link.
Start with r/bugbounty. Among the communities on this list with the most room for self-promotion (rated Medium), it is the largest, with 80,000 members. What works there: Writeups, tips, and program reviews. Posting tip: Share detailed bug bounty writeups that explain your reconnaissance process and how you identified the vulnerability.
Threat analysis or detection writeup with sample queries, IOCs, and what false positives to expect. Each community still rewards something slightly different. The three largest on this list: r/hacking (Tutorials, tools, and CTF writeups); r/privacy (News, tool recommendations, and guides); r/cybersecurity (News, career advice, and discussions).
Marketing speak like "next-gen" or "AI-powered" without architecture detail gets you flagged and removed by mods. The patterns moderators flag fastest: Posting your 'security tool' in r/netsec or r/cybersecurity as a product launch; Asking the sub how to hack a specific system you don't own; Cross-posting the same security news to r/cybersecurity and r/netsec.
This page lists 4 title templates for cybersecurity communities. Two examples, "My first successful bug bounty writeup. $750 payout, took 40 hours. Here's the math and whether it was worth it." and "Ran a red team engagement for a mid-sized fintech. The biggest vulnerability wasn't technical.", show the pattern. Why the first one works: Honesty about the hourly rate (around $18/hr) is exactly what r/bugbounty needs more of. The sub is full of survivorship bias. Posting the honest math attracts people who've had the same experience and drives a real discussion about whether bug bounty is a sustainable career path.
r/SecurityCareerAdvice and r/CompTIA are the best starting points for cybersecurity career questions. r/SecurityCareerAdvice focuses specifically on breaking into the field, while r/CompTIA helps with the certifications that many entry level positions require. Both communities are welcoming to newcomers.
r/netsec is the gold standard for sharing original security research on Reddit. The community expects high quality, technical content with proper methodology. For bug bounty specific findings, r/bugbounty is the appropriate venue. Always ensure responsible disclosure before posting.
Yes, Reddit has dedicated communities for both sides. r/redteamsec covers offensive security and penetration testing, while r/blueteamsec focuses on defensive operations and threat hunting. r/netsec and r/cybersecurity cover both perspectives in a single community.
Cybersecurity subreddits are particularly strict about self promotion because the field demands trust. Open source tools shared with genuine utility tend to be well received on r/netsec and r/blueteamsec. Always be transparent about your affiliation and provide real value before any promotion.
Goal-Based Reddit Guides
If you are here to promote a product, use a rules-first playbook built for the kind of offer you are taking to Reddit.
Promote a SaaS on RedditGoal-Based Reddit Guides
Tools for This Goal
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