| Company | Timeline | Status | |
| Crowdcaster Limited Director • Director | 5 Oct 2015←3 Years→22 Nov 2018 | Dissolved | |
| Online Radio Broadcasting Limited Director • Director | 7 Dec 2010←7 Years→22 Nov 2018 | Active | |
| Sara Martin Media Limited Director • Director | 26 Apr 2010←15 Years→Current | Active | |
| The Online Radio Broadcasting Foundation Limited Director • Director | 22 Oct 2009←9 Years→22 Nov 2018 | Active | |
| Online Digital Broadcasting Limited Director • Director | 14 Jan 2009←9 Years→30 Nov 2018 | Active | |
| Studyvox UK Limited Director • Director | 14 Jan 2009←9 Years→22 Nov 2018 | Dissolved | |
