| 2021 S50 | 2020 S50 | Company | Headquarters | Product Group | 2020 Revenue (US$ Million) |
|---|---|---|---|---|---|
| 1 | 1 | Hikvision Digital Technology (Video Surveillance) | China | Multiple | 8309.44 |
| 2 | 2 | Dahua Technology | China | Multiple | 3835.65 |
| 3 | 3 | Assa Abloy (Electromechanical and electronic locks) | Sweden | Entry System | 2951.79 |
| 4 | 5 | Axis Communications | Sweden | Multiple | 1256.23 |
| 5 | N/A | Motorola Solutions (Video Security and Analytics) | U.S. | Multiple | 927 |
| 6 | 6 | Uniview Technologies | China | Video Surveillance | 765.22 |
| 7 | 7 | Tiandy Technologies | China | Video Surveillance | 688.9 |
| 8 | 8 | Allegion (Electronic Products and Access Control) | U.S. | Entry System | 571.18 |
| 9 | 10 | TKH Group (Vision & Security Systems) | Netherlands | Multiple | 459.32 |
| 10 | 9 | Hanwha Techwin | Korea | Video Surveillance | 448.61 |
| 11 | 11 | Aiphone | Japan | Intercom | 432.34 |
| 12 | 12 | Infinova | China | Video Surveillance | 423.35 |
| 13 | 14 | ZKTeco | China | Multiple | 261.07 |
| 14 | 15 | Streamax Technology | China | Mobile Video Surveillance | 233.18 |
| 15 | N/A | SmartSens Technology | China | Video Surveillance (Lens) | 221.33 |
| 16 | N/A | Intelbras | Brazil | Multiple | 217.12 |
| 17 | 18 | Dongguan Yutong Optical Technology | China | Video Surveillance (Lens) | 213.26 |
| 18 | 16 | VIVOTEK | Taiwan,China | Video Surveillance | 188.2 |
| 19 | 17 | Kedacom (Video Surveillance) | China | Video Surveillance | 161.31 |
| 20 | 20 | Nedap | Netherlands | Multiple | 158.78 |
| 21 | 19 | CP Plus | India | Video Surveillance | 158 |
| 22 | 21 | Milestone Systems | Denmark | Video Surveillance | 155.52 |
| 23 | 25 | Raysharp | China | Video Surveillance | 136.11 |
| 24 | 29 | IDIS | Korea | Video Surveillance | 125.68 |
| 25 | 22 | Tamron (Commercial / Industrial use optics) | Japan | Video Surveillance (Lens) | 125.54 |
| 26 | 27 | Wanjiaan Interconnected Technology | China | Video Surveillance | 114.3 |
| 27 | 30 | TVT Digital Technology | China | Video Surveillance | 114.26 |
| 28 | 24 | Optex (Security Sensors) | Japan | Intrusion Detection | 113.13 |
| 29 | 23 | Commax | Korea | Home Security & Automation | 110.58 |
| 30 | 36 | Napco Security Technologies | U.S. | Multiple | 101.36 |
| 31 | 28 | BCDVideo | U.S. | Video Surveillance | 101.09 |
| 32 | 26 | KOCOM | Korea | Home Security & Automation | 100.86 |
| 33 | 37 | Identiv | U.S. | Entry System | 86.92 |
| 34 | 34 | Fujian Forecam Optics | China | Video Surveillance (Lens) | 84.66 |
| 35 | 32 | Zenitel | Norway | Intercom | 83.19 |
| 36 | 35 | Mobotix | Germany | Video Surveillance | 80.22 |
| 37 | 38 | C-PRO Electronics | Korea | Video Surveillance | 71.9 |
| 38 | 33 | Suprema | Korea | Video Surveillance | 71.25 |
| 39 | N/A | Gallagher | New Zealand | Access Control | 70.09 |
| 40 | 40 | Costar Technologies | U.S. | Video Surveillance | 60.37 |
| 41 | N/A | Foctek Photonics | China | Video Surveillance (Lens) | 52.85 |
| 42 | N/A | BlueSky Technologies | China | Video Surveillance | 47.8 |
| 43 | 41 | DynaColor | Taiwan,China | Video Surveillance | 39.93 |
| 44 | 44 | GeoVision | Taiwan,China | Video Surveillance | 39.28 |
| 45 | 42 | Synectics (System Division) | U.K. | Video Surveillance | 30.35 |
| 46 | 48 | Hi Sharp Electronics | Taiwan,China | Video Surveillance | 28.74 |
| 47 | 47 | ITX AI | Korea | Video Surveillance | 27.26 |
| 48 | 31 | Senstar Technologies | Israel | Multiple | 23.7 |
| 49 | 45 | Hitron Systems | Korea | Video Surveillance | 23.13 |
| 50 | 50 | ACTi | Taiwan,China | Video Surveillance | 14.45 |
