| Coupling | Clutch |
| Coupling is a method of obtaining a permanent connection between the drive and driven shafts. | Clutch can be used to connect and disconnect the driven shaft from driving shaft. |
| It is installed between two shafts. | It is installed between the engine and gearbox. |
| It can be flexible or rigid. | It is rigid in nature. |
| It may or may not use springs. | It uses springs. |
| It may fail during operation. | It is more reliable. |
