| Datafile Software Ltd | Lancashire |
| Dataflow Events Ltd | |
| Dataflow UK Ltd | Surrey |
| DataFormation Ltd | |
| Datafort | Surrey |
| DataGardener Solutions Ltd | |
| Datagraphic | |
| Datahound Ltd | |
| dataIP Ltd | Staffordshire |
| dataJAR | |
| Datalibrium Ltd | Wiltshire |
| Datalink Electronics | Leicestershire |
| Datalinx | West Sussex |
| Datalize | |
| DataLoad | Dorset |
| Datalynk Services Ltd | Northamptonshire |
| Datalyse | |
| Datamango | |
| Datamaran | |
| Datamaran Ltd | |
| Datamellon Ltd | |
| Datamolino Ltd | |
| DataMoo.AI | |
| Datanet Communications Ltd | Berkshire |
| Datanet.co.uk Ltd | Hampshire |
| DataOps.live | |
| Datapact | |
| Datapane | |
| Datapath Ltd | Derbyshire |
| Dataphiles | West Yorkshire |
| DataPress Ltd | |
| DataPro Tools | |
| DataQube Global Ltd | |
| Dataquest Group Ltd | |
| Dataquest International Ltd | Hampshire |
| DataSalon Ltd | Oxfordshire |
| Datasapiens | |
| DataSave Ltd | |
| Datasharp UK Ltd | Cornwall |
| DataSift Ltd | Berkshire |
| Datasmoothie | |
| Datasound Laboratories Ltd | Hertfordshire |
| Datasouth UK Ltd | Hampshire |
| Datastore Computing Ltd | Essex |
| Datastreamer | |
| Dataswyft Ltd | |
| Datasym | |
| Datatech UK Ltd | West Midlands |
| Datatechnology | Hertfordshire |
| Datatecnics Corporation | |