ACE678 (Atlanta Cybersecurity Engineers, Group 678)
Marietta Burger Bar, 1392 Roswell Rd, Marietta · Metro area
Second Wednesday of the month, 6:00 p.m. until about 8:00 or 9:00 p.m.; plans occasionally change, so check the group's Discord before going
Information security and technology community group; students to seasoned professionals welcome, free to attend (order and pay for your own food at the restaurant). Talks, demos and tool walkthroughs welcome. Coordinates on the Atlanta Cybersecurity Engineers Discord, which Atlanta 2600 also uses. No dated meeting could be found anywhere; last_activity is the most recent dated evidence of group activity, a page on the group's wiki (lock pick tool making) updated September 5, 2026. The site blocks some automated readers.
Free
ace678.org [S3] [S8] [S9]
Atlanta 2600
Sandbox, 483 Moreland Ave NE Ste 3, Atlanta (from October 2026) · In the city
First Friday of the month, 6:00 p.m.; often includes a mini-CTF (NetKotH), so bring a laptop
Meets at Sandbox, a hackerspace in Little Five Points, from the October 2, 2026 meeting onward (per atl2600.org). A mini-CTF (NetKotH) often runs; bring a laptop. The 2600.com list still gives Lenox Square Mall.
Free
atl2600.org [S3] [S4] [S5]
Atlanta LockSport
Security Engineering Consultants, 3715 Northcrest Road, Suite 1 (30340); lock pick village at DC404 meetings · Metro area
First Saturday of the month, 12:00 p.m. to 2:00 p.m.; no meeting on October 3, 2026 (resumes November 7, 2026); also a lock pick village at DC404 on third Saturdays
Locksport (recreational lock picking) group. The October 2026 skip reflects the one-time cancellation on October 3, 2026, when members run the Lockpick Village at BSides Atlanta. Last activity is the September 19, 2026 DC404 meeting, where the group runs its lock pick village; the site does not list its own past meeting dates.
Free
atlantalocksport.org [S6]
Atlanta White Hat Hacking, The Acropolis Guard Meetup
Cafe Intermezzo, 4505 Ashford Dunwoody Rd, Dunwoody · Metro area
Sundays, 9:30 a.m. discussion
Small discussion group (about 90 Meetup members). Every weekly listing carries the same topic title, so check the Meetup page before going.
Free
meetup.com/Atlanta-White-Hat-Hacking-The-Acropo… [S7]
BlackHack Society - Atlanta
Freeside Atlanta, 3043 Commerce Way, Atlanta; socials at Hudson Grille, 6317 Roswell Road NE, Sandy Springs · In the city
Ethical Hacker Tactics, CTF and Tech Talks on the first Thursday at 6:30 p.m. at Freeside Atlanta; Cybersecurity n' Chill networking on the third Tuesday at 6:30 p.m. in Sandy Springs
Offensive security practice group; bring a laptop to the Freeside sessions. The July and August 2026 regular sessions were cancelled; meetings resumed on September 3 and September 15, 2026, and were held on October 1 and October 20, 2026. The recurrence covers the Freeside practice night only.
Free
meetup.com/blackhack-society-atlanta [S2]
DC404 (DEF CON Group Atlanta)
Manuel's Tavern, 602 North Highland Ave NE, Atlanta · In the city
Third Saturday of the month; doors 1:00 p.m., meeting 2:00 p.m.; hybrid (in person and online)
Meets in the First Level room or The Eagle's Nest at Manuel's Tavern. Atlanta LockSport runs a lock pick village at these meetings. Meetings held in 2026 on May 16, June 20, July 18, August 15, September 19 and October 17 (the October 17 talk was on Monero; the group's site posted the meeting on October 14, 2026 and no cancellation was found).
Free
dc404.org [S11] [S12]
DC770 (DefCon North Atlanta)
Basement room at Jefferson's Restaurant, 28 W Main St, Cartersville · Metro area
First Tuesday of the month, 7:00 p.m.
Cartersville is about 45 miles northwest of downtown Atlanta. Monthly gathering for tech, gear, ethical hacking and lockpicking; members can present talks or conference dry runs.
Free
dc770.org [S13] [S14]