> fremont, ca · verified oct 23, 2026
California
Inside Fremont, security activity is limited to Ohlone College's NSA-designated cyber defense program, which has had no public event since June 2025, and talks from the Fremont ACM chapter, a general computing group. Most regular meetings are a short drive away in San Jose, Santa Clara, Pleasanton, Oakland and San Francisco: ISSA, ISC2 and WiCyS in Silicon Valley meet monthly, OWASP Bay Area moves around the region, and DEF CON groups meet in Campbell and Berkeley. San Francisco hosts the large conferences, including OWASP Global AppSec USA in November 2026, BSidesSF on April 3 to 4, 2027 and RSAC on April 5 to 8, 2027.
Mon, Nov 2 to Fri, Nov 6, 2026 · Training November 2 to 4; conference November 5 to 6
Hyatt Regency San Francisco · Metro area
The OWASP Foundation's main US conference. Training (November 2 to 4) and the conference (November 5 to 6) are separate ticket purchases; the registration page read states no price.
ConfirmedConferencePaid
Mon, Nov 2 to Sat, Nov 7, 2026 · Mon, Nov 2 to Sat, Nov 7, 2026; courses run 5 to 6 days
Hilton San Francisco Financial District, 750 Kearny St, San Francisco · Metro area
Paid multi-day SANS courses, in person and online (live online in Pacific time). The page lists a course fee of $8,780 for one course and $999 for a certification attempt, plus a hotel group rate; other courses may differ.
ConfirmedTrainingPaidVendor-hosted
Fri, Nov 6, 2026 · 6:00 p.m.
4 Embarcadero Center, ground level by the information kiosk, San Francisco · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Nov 6, 2026 · 6:00 p.m.
Outside the Dr. Martin Luther King Jr. Library, downtown San Jose · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Nov 6 to Sat, Nov 7, 2026 · Conference on November 7; reception on November 6
Hyatt Regency Embarcadero, San Francisco · Metro area
A small threat modeling conference (under 120 attendees) held right after OWASP Global AppSec USA. The page offers early-bird tickets at $50 off through mid-October or while supply lasts, without stating the base price; no exact deadline is given. Run by the Threat Modeling Connect community; vendor_hosted is a judgement call.
ConfirmedConferencePaidVendor-hosted
Tue, Nov 10, 2026 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Nov 10, 2026 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Thu, Nov 12, 2026 · 5:00 to 8:00 p.m.
Cisco Building 17, San Jose · Metro area
An evening panel and reception. The Luma page says registration needs host approval and states no ticket price. The same page earlier showed a midnight start time; it now shows 5:00 to 8:00 p.m. on November 12, 2026.
ConfirmedMeetupFree
Fri, Nov 13, 2026 · 8:00 a.m. to 5:00 p.m.
Las Positas College, Building 2400, Livermore · Metro area
Early-bird tickets are $100 for chapter members, $145 for non-members and $45 for full-time students; after October 31, 2026 they are $145, $175, and $75 for students, retirees and the unemployed. Las Positas students and staff may attend free from 1:00 p.m. A speaker dinner on November 12, 2026 in Pleasanton is by invitation only.
ConfirmedConferencePaid
Tue, Nov 17, 2026 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Nov 17, 2026 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Thu, Nov 19, 2026
Silicon Valley (venue not shown on the calendar) · Metro area
The chapter calendar lists "November 19, 2026 - In Person Meeting" with no venue, time or fee, so the access value is an assumption; check the chapter before going.
ConfirmedChapter meetingMembers only
Sat, Nov 21, 2026 · 8:00 to 11:00 a.m.
Fremont Downtown Event Center, 3500 Capitol Ave, Fremont
A general technology talk series, not security-focused; the description lists cybersecurity among several topics. The page offers attendee registration and states no fee. Times come from the page's event data, converted to Pacific time.
ConfirmedMeetupFree
fremont.acm.org/event/computing-at-the-frontier… [S15] [S16]
Tue, Nov 24, 2026 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Nov 24, 2026 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 1, 2026 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 1, 2026 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Dec 4, 2026 · 6:00 p.m.
4 Embarcadero Center, ground level by the information kiosk, San Francisco · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Dec 4, 2026 · 6:00 p.m.
Outside the Dr. Martin Luther King Jr. Library, downtown San Jose · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 8, 2026 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 8, 2026 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 15, 2026 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 15, 2026 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 22, 2026 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 22, 2026 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 29, 2026 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Dec 29, 2026 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Jan 1, 2027 · 6:00 p.m.
4 Embarcadero Center, ground level by the information kiosk, San Francisco · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Jan 1, 2027 · 6:00 p.m.
Outside the Dr. Martin Luther King Jr. Library, downtown San Jose · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Jan 5, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Jan 5, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Jan 12, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Jan 12, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Jan 19, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Jan 19, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Jan 26, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Jan 26, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Feb 2, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Feb 2, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Feb 5, 2027 · 6:00 p.m.
4 Embarcadero Center, ground level by the information kiosk, San Francisco · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Feb 5, 2027 · 6:00 p.m.
Outside the Dr. Martin Luther King Jr. Library, downtown San Jose · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Feb 9, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Feb 9, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Feb 16, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Feb 16, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Feb 16, 2027 · 8:00 a.m. to 6:00 p.m.
Santa Clara Marriott, 2700 Mission College Blvd, Santa Clara · Metro area
A one-day summit run by the events business CyberRisk Alliance. Standard admission is $325, and the page says admission is reserved for active cybersecurity, IT and information security practitioners, so registrations are screened.
ConfirmedSummitPaidVetting requiredVendor-hosted
Tue, Feb 23, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Feb 23, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 2, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 2, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Mar 5, 2027 · 6:00 p.m.
4 Embarcadero Center, ground level by the information kiosk, San Francisco · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Mar 5, 2027 · 6:00 p.m.
Outside the Dr. Martin Luther King Jr. Library, downtown San Jose · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 9, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 9, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 16, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 16, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 23, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 23, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 30, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Mar 30, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Apr 2, 2027 · 6:00 p.m.
4 Embarcadero Center, ground level by the information kiosk, San Francisco · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Fri, Apr 2, 2027 · 6:00 p.m.
Outside the Dr. Martin Luther King Jr. Library, downtown San Jose · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Sat, Apr 3 to Sun, Apr 4, 2027
San Francisco (venue not yet announced; 2026 edition at City View at Metreon) · Metro area
The BSidesSF home page says "BSidesSF 2027 will be April 3-4!" and the tickets page says registration is not yet open, so no price or venue is published. Past editions were paid, so access is shown as paid.
ConfirmedConferencePaid
Mon, Apr 5 to Thu, Apr 8, 2027
Moscone Center, 747 Howard St, San Francisco · Metro area
The organizer's March 27, 2026 press release states that RSAC 2027 Conference takes place April 5 to 8, 2027 at the Moscone Center, and Moscone Center's event calendar gives the same dates. Neither page states a ticket price; the organizer's own site (rsaconference.com) refused automated access on October 22, 2026, so it was not read.
ConfirmedConferencePaidVendor-hosted
Tue, Apr 6, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Apr 6, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Apr 13, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Apr 13, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Apr 20, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Apr 20, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Apr 27, 2027 · 7:00 p.m.
272 Capp St, San Francisco (Mission District) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Tue, Apr 27, 2027 · 7:30 p.m.
549 48th St, Oakland (side entrance on 48th St) · Metro area
Per published schedule; confirm with organizer.
MeetingFree
Wed, Jun 16 to Thu, Jun 17, 2027
San Jose McEnery Convention Center, San Jose · Metro area
A vendor-run trade show. The organizer's page lists a free pass for some visitors and a $499 Full Access Gold Pass; check who qualifies for a free pass before registering.
ConfirmedConferenceFreePaidVendor-hosted
Mon, Jun 21 to Wed, Jun 23, 2027
Northeastern University Silicon Valley Campus, San Jose · Metro area
Author registration deadline (also the last day a refund can be approved): Thu, Apr 15, 2027
The eighth annual conference of the nonprofit Silicon Valley Cybersecurity Institute, with research papers, tutorials and industry talks. The site says registration opens in 2027 and lists early-bird pricing until April 20, 2027 without stating amounts, so the paid value is an assumption.
ConfirmedConferencePaid
Announced without a date, or expected from past editions. Not confirmed.
Announced by the organizer; date not yet published.
East Bay (venue not yet announced) · Metro area
Date TBAMeetupFree
Announced by the organizer; date not yet published.
East Bay (2026 edition at Las Positas College, Livermore) · Metro area
Date TBAConferencePaid
Held March 23, 2026 during RSAC week; 2027 date not yet announced
San Francisco Bay Area · Metro area
ExpectedConferencePaid
Held August 27 to 28 in 2026; 2027 dates not yet announced
Santa Clara (2026 edition at the Santa Clara Convention Center) · Metro area
ExpectedConferencePaid
San Francisco (location given to registrants) and online · Metro area
Periodic KnowledgeNet meetings, in person and virtual
IAPP says only IAPP members can join KnowledgeNet chapters. The two chapters met jointly in person on September 29, 2026 (listed as sold out; the chapter pages no longer show it, and no post confirms it took place), and have another in-person meeting listed for October 29, 2026. Time and address are given only to registrants.
Members only
iapp.org/community/iapp-chapters/san-francisco-… [S28] [S29]
Silicon Valley (location given to registrants) · Metro area
Periodic KnowledgeNet meetings on privacy and AI governance, often held jointly with the San Francisco Bay Area chapter
IAPP says only IAPP members can join KnowledgeNet chapters. The two chapters met jointly in person on September 29, 2026 (listed as sold out; the chapter pages no longer show it, and no post confirms it took place), and have another in-person meeting listed for October 29, 2026. Time and address are given only to registrants.
Members only
iapp.org/community/iapp-chapters/silicon-valley… [S30] [S31]
San Francisco · Metro area
Spring and fall conferences plus occasional community events
The 2026 Spring Conference was held May 14, 2026 at KPMG's San Francisco office. The chapter's October 3, 2026 CommunITy Day at Ocean Beach is a volunteer event, not a security program. The fall conference was listed for October 8, 2026 at SPUR Urban Center; that date is used for last activity.
Paid
Santa Clara, Pleasanton and online · Metro area
Monthly webinars and in-person events, plus an annual two-day conference in late August
The chapter calendar lists a monthly webinar and an in-person meeting for most months, with an in-person meeting on November 19, 2026 (no venue or time shown). Last activity is the annual conference on August 27 to 28, 2026 at the Santa Clara Convention Center; the September 17, 2026 in-person meeting appears on the calendar, but no page confirms it took place.
Paid
East Bay; monthly meetings on Zoom, conferences at Las Positas College, Livermore · Metro area
Monthly member meetings on Zoom, usually a Thursday from 7:00 to 9:00 p.m.; in-person conferences a few times a year
The ISC2 chapter closest to Fremont. Monthly member meetings are online webinars (registration required, 2 CPEs); the in-person events are the chapter's conferences, which charge admission.
Free
San Francisco (Financial District) and online · Metro area
Irregular happy hours, joint networking events and online talks, announced on the chapter's LinkedIn page
The chapter's website calendar stops at a July 31, 2025 joint event, but it posts current events on LinkedIn: an online talk, "Who Is Qualified to Supervise an AI Agent?", on Thursday, September 10, 2026, and happy hours at Harlan Records in August and September 2026. The chapter's LinkedIn page announces a Tech Week 2026 happy hour on Sunday, October 11, 2026 (6:00 to 7:00 p.m., Harlan Records, San Francisco), used for last activity, and another happy hour on October 30 whose post shows no year.
Free
Santa Clara (host company varies), with a Zoom option · Metro area
Monthly chapter meetings from 6:00 to 8:00 p.m., usually on a Tuesday; no meetings in July and August in 2026
The September 8, 2026 meeting was hybrid at Palo Alto Networks headquarters in Santa Clara; the address is shown after free registration on Luma. The 2026 meetings fell on second Tuesdays, but the chapter does not publish a fixed rule.
Free
San Francisco Bay Area; the 2026 meeting was online · Metro area
No regular schedule; one virtual meeting posted for 2026
The chapter site shows only a virtual "revitalization" meeting on April 8, 2026 and a board list with two open seats. It may not hold in-person meetings; check the site before relying on it.
Quiet: last activity Apr 2026Free
San Jose and Sunnyvale (host companies vary) · Metro area
Monthly evening meetings, usually on a Tuesday at 5:30 p.m., in person with a virtual option
Meetings in 2026 fell on the third Tuesday of the month, but the chapter does not publish that as a fixed rule. Registration is through Luma and the October 20, 2026 meeting, shown under Past Meetings, was free. The chapter site lists no later meeting. The December holiday party is for members and approved guests only.
Free
Rotates among Pleasanton, Palo Alto, San Mateo, Redwood City, Mountain View and San Francisco · Metro area
Monthly evening meetups from 5:00 to 8:00 p.m.; host company and city change each month
Check the city before going: the July and September 2026 meetups were in Pleasanton, others in San Mateo, Palo Alto and San Francisco. The chapter has co-hosted meetups with CSA San Francisco and Pacific Hackers.
Free
Marufuku Ramen, Pruneyard Shopping Center, Campbell · Metro area
Third Thursday of the month, 7:30 p.m.; sometimes moved to another Thursday when the San Jose Sharks play at home
The group moved after DEF CON 34 (August 2026) from its downtown San Jose spot to Marufuku Ramen in Campbell, according to its July 23, 2026 forum post. The last activity date is the August 20, 2026 meeting it announced on the DEF CON forum on August 14; no post confirms it took place. Last-minute changes go out on the group's Discord.
Free
Near the Ashby BART station, Berkeley (exact spot shared by message) · Metro area
Usually a Sunday at 11:00 a.m., on or near the Sunday next to the second Monday of the month; rain delays are common
The group posts meeting dates on Bluesky, where it announced on June 7, 2026 that the meeting was being held that day and announced a July 12, 2026 meeting. Its website still showed the July 2026 meeting when checked in September. Dates move for weather and holidays, so check Bluesky before going. The group's site lists its next regular meeting as Sunday, November 8, 2026 at 11:00 a.m. near the Ashby BART station; a Bluesky post announced an October 11 meeting, but no post confirms it was held.
Free
Palo Alto, Sunnyvale and San Francisco (venues vary) · Metro area
Meetups, CTF days and an annual conference; no fixed schedule
A nonprofit hacker community. Its pre-DEF CON CTF and barbecue ran June 26, 2026 in San Francisco and June 27, 2026 at Endor Labs in Palo Alto. It runs the Pacific Hackers Conference, held November 1, 2025 at Plug and Play Tech Center in Sunnyvale.
Free
4 Embarcadero Center, ground level by the information kiosk, San Francisco · Metro area
First Friday of the month, 6:00 p.m.
Part of 2600 Magazine's monthly meeting network. The last activity date is the first Friday of September 2026, when the magazine's September list still named this meeting; no post confirms that a specific meeting took place.
Free
Outside the Dr. Martin Luther King Jr. Library, downtown San Jose · Metro area
First Friday of the month, 6:00 p.m.
Part of 2600 Magazine's monthly meeting network and the closest 2600 meeting to Fremont. The last activity date is the first Friday of September 2026, when the magazine's September list still named this meeting; no post confirms that a specific meeting took place.
Free
Palo Alto and Sunnyvale (host companies vary), some online · Metro area
Evening technical talks every month or two at 6:00 p.m.
Talks cover application security, reverse engineering and offensive testing. The most recent was on April 2, 2026 at Straiker in Sunnyvale; no later date was posted when checked.
Quiet: last activity Apr 2026Free
San Francisco Bay Area (meeting places not published) · Metro area
No published schedule; events are posted on Cyversity's member platform
Cyversity (formerly ICMCP) supports women, underrepresented communities and veterans in cybersecurity; membership is paid. The chapter page is current, but its event listings could not be read without logging in. The last activity date is the joint speaker event with ISC2, ISACA and ISSA San Francisco on July 31, 2025, from the ISC2 San Francisco calendar.
Quiet: last activity Jul 2025Paid
San Jose and San Francisco (host companies vary) · Metro area
Evening talks and networking about once a month; dates posted on Luma
The chapter's events page lists a September 24, 2026 lightning-talk evening at Nutanix in San Jose under past events for 2026, which is used for last activity. A joint meeting with ISSA Silicon Valley was held on October 20, 2026. Events are mostly in San Jose and San Francisco; registration is on Luma.
Free
San Francisco (host companies vary) · Metro area
Occasional workshops and socials; no fixed schedule
The local arm of a national nonprofit. The last dated event found is a lock picking workshop with Lockpick Extreme at Cloudflare, 101 Townsend St, on March 20, 2026. The event page does not state a price or who may attend, so the access value is an assumption; check the organizer's site before going.
Quiet: last activity Mar 2026Free
San Francisco · Metro area
Formerly occasional meetups
The last event on the group's Meetup page is a February 23, 2020 RSA week gathering. The chapter is not among the Women's Society of Cyberjutsu chapters currently listed; the nearest listed chapter is in Southern California.
Free
Sutardja Dai Hall 621, UC Berkeley · Metro area
General meetings Thursdays 7:00 to 8:00 p.m. during the semester, per the club site
UC Berkeley's student cybersecurity club and home of the 0ski CTF team; open to anyone at UC Berkeley. The last dated activity on its site is the Western Regional Collegiate Cyber Defense Competition season, which ended March 29, 2026; the club does not post dates for its weekly meetings, so the quiet status may understate activity during the fall semester.
Quiet: last activity Mar 2026Students only
San Jose State University, ISB 842 · Metro area
During the semester: CTF practice Fridays at 2:15 p.m. and workshops Thursdays at 1:30 p.m.
San Jose State is an NSA CAE school. The club's last dated event is an Intro to Network Defense workshop on October 10, 2025; its officer list is for fall 2025. SJSU also has a WiCyS student chapter.
Quiet: last activity Oct 2025Students only
City View at Metreon, 135 4th St, San Francisco · Metro area
Annual two-day community conference in March, the weekend before RSAC
BSidesSF 2026 was held March 21 to 22, 2026. The status is quiet only because the conference runs once a year; the site had not announced 2027 dates when checked.
Quiet: last activity Mar 2026Paid
San Francisco (host companies vary, including Snyk's AI Innovation Hub and the AWS AI Builder Loft) · Metro area
In-person meetups and hackathons about securing AI systems, roughly every week or two; dates are posted on Meetup and Luma
A San Francisco chapter of the global AI Security Engineers community, sponsored by Snyk. Its Meetup page lists a September 29, 2026 hackathon at the AWS AI Builder Loft and an October 6, 2026 workshop, Hacking AI for Fun & Profit, at Snyk's AI Innovation Hub as past events. It has also partnered with ISC2 East Bay on a hands-on workshop. Its Meetup page also lists online sessions on October 20 and 21, 2026 and an online "Hack of Horrors" on October 30, 2026.
Free
San Francisco (host companies vary) · Metro area
Evening meetups every month or two, 5:30 to 8:00 p.m.
The most recent meetup found was July 29, 2026 at 600 Illinois St, San Francisco. The chapter says local membership and events are free. No later date was posted when checked.
Free
Fremont (Downtown Event Center and city community centers) · In the city
About one tech talk a month on weekends; dates posted on the chapter calendar
A general computing chapter, not a security group. It has run security talks: "The AI Paradox in Security" on October 26, 2025 at the Irvington Community Center and "The Rise of Intelligent Attacks and Smarter Defenses" on May 16, 2026 at the Fremont Downtown Event Center, 3500 Capitol Ave. Its September 26, 2026 talk, listed as a past event, was on AI and software architecture, and that is the date used for last activity. Its November 21, 2026 talk names cybersecurity as one of several topics.
Free
272 Capp St, San Francisco (Mission District) · Metro area
Weekly members' meeting on Tuesdays at 7:00 p.m.; classes, hack nights and workshops on most other days are posted on its Meetup and Luma calendars
A volunteer-run hackerspace, not a security group: the calendar is mostly electronics, woodworking, game development and software infrastructure nights. It is listed because it is the home of DC415 and hosts occasional security talks. The last activity date is its Gamebridge game development meetup on Wednesday, October 7, 2026. The Tuesday 7:00 p.m. members' meeting time comes from the Meetup group description.
Free
549 48th St, Oakland (side entrance on 48th St) · Metro area
Hardware Hack Night and Fix-it Clinic on Tuesdays at 7:30 p.m.; other open nights (Women and Non-Binary Hack Night on Mondays, Radio Wednesdays, Software and Electronics Hack Night on Thursdays) are posted on the calendar
A volunteer-run hackerspace, not a security group: hack nights cover electronics, software, radio and repair, with occasional firmware and privacy talks. The last activity date is its Spaz Radio broadcast night on Wednesday, September 23, 2026. Its own site (sudoroom.org) returned HTTP 403 on October 22, 2026, so dates were read from its Luma calendar, which lists weekly nights through November 2026; the last activity date is carried over from the Oakland page.
Free
Numbered references for the listings on this page.