- JAK
- JAMK University of Applied Sciences [Jyväskylä]
- JG Communication [Sweden]
- JK Lakshmipat University
- JMP Research & Development AB
- JOANNEUM RESEARCH - Institute for Robotics and Mechatronics
- JP Morgan AI Research
- JRC Institute for Environment and Sustainability
- JRC Institute for Prospective Technological Studies
- JRC Institute for the Protection and Security of the Citizen [Ispra]
- JSC Angstrem
- JUNIA
- Jacobs University = Constructor University [Bremen]
- Jade Hochschule
- Jaipuria Institute of Management [Lucknow]
- Jaipuria Institute of Management [Noida]
- Jalpaiguri Government Engineering College
- James Madison University
- Jan Evangelista Purkyne University
- Japan Advanced Institute of Science and Technology
- Japan Science and Technology Agency
- Japanese French Laboratory for Informatics
- Jaypee University of Information Technology
- Jet Propulsion Laboratory
- Jiangsu Academy of Agricultural Sciences
- Jiangsu Hoperun Software
- Jiangxi University of Finance and Economics
- Jilin Normal University
- Jilin University
- Jinan University [Guangzhou]
- JobBKK
- John Carroll University
- John Naisbitt University
- John von Neumann Computer Society
- Johnson C. Smith University
- Joint Institute for Nuclear Research
- Joint Research Center Institute for the Protection and Security of the Citizen
- Jonkoping University
- Jordan University of Science and Technology
- Josip Juraj Strossmayer University of Osijek
- Jozef Stefan Institute [Ljubljana]
- Jozef Stefan International Postgraduate School [Ljubljana, Slovenia]
- Julius-Maximilians-Universität Würzburg
- Juntendo University
- Juola and Associates
- Justus-Liebig-Universität Gießen = Justus Liebig University
- Jyske Bank
- Jönköping University
- Jönköping University [Sweden]
- jaypee Institute of Information Technology