| Adt Security Services | Adt Security Services | — | (650) 458-0123 | Alarm and generators | Brisbane · San Francisco County | — | — |
| Armada Mobile Security Patrol | Armada Mobile Security Patrol | — | (415) 533-5534 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Armada Protective Services Inc. (armada Security) | Armada Protective Services Inc. (armada Security) | mb@armadasecurity.com | (415) 647-8500 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Ax9 Security | San Francisco | Ax9 Security | San Francisco | — | (415) 854-7486 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Bannerman Security | Bannerman Security | matt@bannerman.com | (415) 697-0610 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Complete Security INC | Paul Frederic Gommel | — | (415) 543 1660 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Foxtron Security INC | John Ma | info@foxtronsecurity.com | (415) 939 8232 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Instaguard Security Services-San Francisco-Bay Area | Instaguard Security Services-San Francisco-Bay Area | info@instaguardinc.com | (800) 786-0698 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Itz Networks | Itz Networks | 1@itznetworks.com | (415) 446-8877 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Jones Protective Services | Jones Protective Services | — | (415) 695-8800 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Mainline Security INC | Roy Edward Pisetsky | — | (415) 398 6161 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Mcmillan Security Systems Inc. | Mcmillan Security Systems Inc. | — | (415) 992-7096 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Mint Security INC | Mint Security INC | — | (415) 757-9190 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Nob Hill Security | Nob Hill Security | info@nobhillsecurity.com | (415) 797-7575 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Protech Security Services INC | Protech Security Services INC | — | (415) 243-2100 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Red Dragon Private Security | Red Dragon Private Security | — | (877) 865-7571 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Safe And Sound Security | Safe And Sound Security | — | (415) 366-8067 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Security 101 - San Francisco Bay Area | Security 101 - San Francisco Bay Area | — | (925) 951-0444 | Alarm and generators | Pleasanton · San Francisco County | — | — |
| Sf Security Pro INC DBA Sf Security Camera Pro | Sergey Mikhailovich Ulyanov | — | (415) 432 7823 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Twilight Security & Investigation INC | Antoinette Marie Sison-Wong | — | (415) 252 1955 | Alarm and generators | San Francisco · San Francisco County | — | — |
| Warman Security | Joanie Marie Costamagna | estimate@warmansecurity.com | (415) 775 8513 | Alarm and generators | San Francisco · San Francisco County | — | — |