| Bacra Ltd | |
| Bactobio | |
| Badger Bytes | East Sussex |
| Badger Software | Berkshire |
| BadgerNet | |
| BAE Systems | |
| Bailey & Waine Tech Solutions | |
| Bailey Solutions | East Sussex |
| Baker Heath Associates | Leicestershire |
| Bakery Computing | |
| Balance Creative | Hertfordshire |
| Balderton Capital (UK), LLP | |
| Ballard Chalmers Ltd | West Sussex |
| Ballyhoo Ltd | West Midlands |
| Bam Boom Cloud Ltd | |
| Bamn.digital | Glasgow |
| Bamsh Digital Marketing | |
| Banana Apps Ltd | |
| Banc Media Ltd | Greater Manchester |
| Bandarlog.dev | |
| Bandicoot Ltd | Lancashire |
| Bang Consulting Ltd | |
| Bangor University | Gwynedd |
| Bangor University - School of Computer Science and Electronic Engineering | Gwynedd |
| Bank Mandiri (Europe) Ltd | |
| Bank of Africa United Kingdom plc | |
| Bank of Beirut (UK) Ltd | |
| Bank of Ceylon (UK) Ltd | |
| Bank of England | Greater London |
| Bank of Scotland | Edinburgh |
| Bank Saderat plc | |
| Bank Sepah International plc | |
| Banked Ltd | County Durham |
| Banking Transformation Summit | |
| Banking Works | Flintshire |
| Banks Digital Ltd | Greater Manchester |
| Bannerbridge Ltd | Essex |
| Banter Media Ltd | |
| Banxia Software Ltd | Cumbria |
| Bar Code Data Ltd | Greater Manchester |
| Barclay Communications | Belfast |
| Barclays | |
| Barclays Accelerator | Greater London |
| Barclays Bank UK plc | Greater London |
| Barcode Connexions | Hertfordshire |
| Barcode Solutions (Europe) Ltd | East Riding of Yorkshire |
| Barcode Technologies Ltd | Hertfordshire |
| Barcode-IT Ltd | Lancashire |
| Barcode-IT Ltd | |
| Barcodes for Business Ltd | Oxfordshire |