- Jakob Gomez Studio
- Jakobsen Home ApS
- Jakobsson Pusterla AB
- Jam Furniture
- JAM SPA
- JAMA di Jennifer La mattina
- Jamar di Panzarin Tiziano snc
- jambel
- Jambo
- Jamé Janssen Meubelen B.V
- James Burleigh Ltd.
- James Corner Field Operations
- James De Wulf
- James Deans & Associates
- James DeWulf
- James Florio Photography
- James Garvan Architecture
- James Gorst Architects
- James Hare