Reactis is used by companies around the world in the automotive,
aerospace/defense, heavy equipment, medical, and energy industries as well
as in academia.
| Advics | Airbus | Aisin |
| Aptiv Components India Pvt. Ltd. | AVL | Azapa |
| Autoliv | BAE Systems | Bendix |
| Bosch | Calsonic Kansei | Carmeq |
| Chimei Motor | China Institute of Aeronautical Radio Electronics | China Motor TW |
| Chrysler | Chung Shan Institute of Science and Technology | CK Electric Machinery Development |
| Collins Aerospace | Continental Automotive | DaeSung Electric |
| Daihatsu Motor | Daimler | DIAS Automotive Electronic Systems China |
| Delphi Corporation | Delphi Diesel Systems | Delphi Propulsion Systems |
| Delphi Technical Center India | Delta Taiwan | Denso |
| DENSO TECHNO Co.,Ltd | DongFeng Commercial Vehicle China | DongFeng Nissan Passenger Vehicle |
| Eaton | Fiat Chrysler Automobiles | Ford |
| Fraunhofer Center for Experimental Software Engineering | Fuji Heavy Industries | Fujitsu BSC Japan |
| Fujitsu Computer Technologies | GE Global Research | GE Transportation |
| General Motors | Gwangju Institute of Green-car Advancement | Hanhwa |
| Hitachi | Hitachi Astemo | Hitachi Automotive Systems, Ltd. |
| Hitachi ULSI Systems Japan | Honda | Honda Elesys |
| Honeywell | Hyundai Autron | Hyundai Wia Korea |
| Imasen Electric Industrial | Isuzu | Jatco |
| John Deere | Karma | Keihin Corporation |
| Keihin Electronics Technology | Keihin R&D China | KPIT |
| Mando | Magneti Marelli India Pvt. Ltd. | Marelli |
| Mazda | McMaster University | Mercedes-Benz Research and Development |
| Mitsubishi | Mitsubishi Electric Control Software | Mitsubishi Electric Micro-Computer Application Software |
| Mitsubishi Motors | Nabtesco | Navistar |
| NASA Ames Research Center | Nexteer | Nissan |
| Nissan Techno Vietnam | Opel Automobile GmbH | Panasonic Advanced Technology Development |
| Panasonic Japan | Pi Innovo | Renault |
| Renault Nissan India | Rockwell Collins | SAIC Motor Corporation |
| SGS Taiwan | SKY Japan | Smiths Medical |
| SRM Technologies | Stellantis | Strattec |
| Suzuki Motor Corporation | Taiwan Institute of Nuclear Energy Research | Tata Consultancy Services |
| Tata Elxsi | Tata Motors | The Software Beret |
| Toyota Motor Corporation | Toyota Technical Development Corp | Toyota Tsusho Denso Electronics Thailand |
| Transtron | TRW | University of Minnesota |
| Veoneer | Vitesco | Witte Automotive France |
| Yamaha Motor Corporation | ZF | |
