| Score | Rank | Name | Members | Category | ||
|---|---|---|---|---|---|---|
| 01 |  |  | hacking: security in practice r/hacking | 2.6M | Cybersecurity | |
| 02 |  |  | cybersecurity r/cybersecurity | 443K | Cybersecurity | |
| 03 |  |  | Your Hacking Tutorial by Zempirians r/HowToHack | 383K | Cybersecurity | |
| 04 |  | A forum for the security professionals and white hat hackers. r/Hacking_Tutorials | 221K | Cybersecurity | ||
| 05 |  | AskNetsec AskNetsec | 176K | Cybersecurity | ||
| 06 |  | All about CompTIA certifications. r/CompTIA | 159K | Cybersecurity | ||
| 07 |  | Blackhat Library: Hacking techniques and research r/blackhat | 80K | Cybersecurity | ||
| 08 | | Computer Forensics r/computerforensics | 56K | Cybersecurity | ||
| 09 | | CISSP - Certified Information System Security Professional r/cissp | 52K | Cybersecurity | ||
| 10 | | cyberlaws: Legal News Related ToTechnology And The Net r/cyberlaws | 36K | Cybersecurity | ||
| 11 |  | Hackers r/hackers | 33K | Cybersecurity | ||
| 12 | | For [Blue|Purple] Teams in Cyber Defence r/blueteamsec | 33K | Cybersecurity | ||
| 13 | | Computer Security - IT security news, articles and tools r/ComputerSecurity | 31K | Cybersecurity | ||
| 14 |  | i2p — anonymous network r/i2p | 30K | Cybersecurity | ||
| 15 |  | Hack Bloc r/HackBloc | 25K | Cybersecurity | ||
| 16 |  | Hacking and cracking, done respectfully r/ethicalhacking | 24K | Cybersecurity | ||
| 17 | | Information Security r/Information_Security | 21K | Cybersecurity | ||
| 18 | | Cybersecurity Career Discussion r/CyberSecurityJobs | 21K | Cybersecurity | ||
| 19 | | r/cyber: The 5th Domain of Warfare r/cyber | 16K | Cybersecurity | ||
| 20 |  | Data Recovery r/datarecovery | 14K | Cybersecurity |
