- Xavier University
- Xeno-canto foundation
- Xenocs SAS
- Xerox Company
- Xerox Research Centre Europe [Meylan]
- Xiamen University
- Xiangtan University
- Xiangtan University (XTU)
- Xi’an Jian Tong University
- Xi'an Jiaotong University
- Xi'an Polytechnic University
- Xi'an Shiyou University
- Xi'an Technological University