
| Company name | Primary business area | Primary coverage | |
|---|---|---|---|
| Adax Business Systems W.L.L. | CCTV | Qatar | |
| The Hemming Group Ltd. | Physical security | United Kingdom (UK) | |
| 123 Pte Ltd | Biometrics | Asia | |
| 1A Hamilton Security Limited | Manned guarding | United Kingdom (UK) | |
| 1st Choice CCTV | CCTV | United Kingdom (UK) | |
| 24/7 Close Protection Ltd | Physical security | United Kingdom (UK) | |
| 247 Group | Biometrics | South Africa | |
| 4Site Online Ltd. | Integrated security | Western Europe | |
| Aarya Ites Pvt. Ltd. | CCTV | India | |
| AB Security | CCTV | United Kingdom (UK) | |
| ABL, Inc. | Physical security | Czech Republic | |
| Able Security Concepts Ltd | Manned guarding | United Kingdom (UK) | |
| Absolute Security Ltd. | CCTV | Kenya | |
| Absolute Software Corp. | Access control | United States of America (USA) | |
| Accent Alarms, Inc | CCTV | North America | |
| Access Buzzers | Door interface/controls | United Kingdom (UK) | |
| Access Control SA | Access control | South Africa | |
| Access Hardware Supply | Access control | United States of America (USA) | |
| Access Specialties, Inc. | Integrated security | United States of America (USA) | |
| Acme Security Systems | CCTV | United States of America (USA) | |
| Acropolis Electronic Security Systems. | Integrated security | India | |
| ACUMEN Int. Corp | CCTV | Taiwan | |
| AD Porta Security | Manned guarding | United Kingdom (UK) | |
| Adaar Technology | Integrated security | India | |
| ADB Alarms Ltd | Intruder alarm | United Kingdom (UK) | |
| ADEN Services | Physical security | China | |
| ADi security and surveillance | CCTV | United Kingdom (UK) | |
| Aditech Infotech Pvt. Ltd. | Biometrics | India | |
| ADL Fire and Security Ltd | CCTV | United Kingdom (UK) | |
| Adore Security | CCTV | Israel | |



