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 |
| BorgWarner | 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 |
| Daimler Truck Innovation Center India | 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 |
| Mobis India | 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 | |
