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 |
| 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 | | |
