| Smart Insider Ltd | |
| Smart Insights (Marketing Intelligence) Ltd | West Yorkshire |
| Smart Kiwi | |
| Smart Manufacturing Technology Ltd | |
| Smart Monkey Marketing | West Sussex |
| Smart Nano NI | |
| Smart Numbers Ltd | |
| Smart Print and Labelling Ltd | Wrexham County Borough |
| Smart Recruit Online | |
| Smart Separations Ltd | |
| Smart Teachers | |
| Smart Volution Ltd | |
| Smart Web Design | |
| Smart Working Solutions Ltd | |
| Smart-e (UK) Ltd | Surrey |
| Smarta | |
| Smartbox Assistive Technology | |
| Smartcard Focus | Surrey |
| SmartConsign | |
| Smartebusiness | |
| SMARTech Energy Ltd | |
| Smarter Contracts Ltd | |
| Smarter Digital Marketing Ltd | |
| Smarter Grid Solutions | |
| Smarter Interactive Ltd | Berkshire |
| Smarter Shows (Tarsus) Ltd | |
| Smarter Systems | Surrey |
| Smarter Technologies Ltd | Greater Manchester |
| SmartFrame Technologies Ltd | |
| SmartHead Co. | |
| Smartia | |
| SmartKem | |
| smartKYC | |
| Smartleap | |
| SmartLogiq Ltd | |
| SmartMatrix Ltd | |
| Smartmessages | |
| Smartnumbers | |
| SmartPA Global Ltd | |
| SmartPulse Global Ltd | |
| Smarts | |
| Smartsoft Computing Ltd | Bristol |
| SmartSpace Software plc | Bedfordshire |
| SmartStream Technologies Ltd | |
| Smartt Software Ltd | |
| SmartTHING Ltd | |
| Smartunit | Greater London |
| SmartWatch Solutions | |
| Smarty | |
| Smartzer Ltd | |