| Bactobio | |
| Bad Dinosaur | |
| Badass Web Design Co. | |
| Badger Bytes | East Sussex |
| Badger Software | Berkshire |
| BadgerNet | |
| Badrilla | |
| BAE Systems | |
| Bag of Bees Ltd | |
| 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 |
| Baloch Media Hub | |
| Baltic Design | |
| Baltic Ventures | |
| Bam Boom Cloud Ltd | |
| Bamboo Manchester | |
| Bamn.digital | Glasgow |
| Bamsh Digital Marketing | |
| Banana Apps Ltd | |
| Banao Technologies | |
| Banc Media Ltd | Greater Manchester |
| Bandarlog.dev | |
| Bandicoot Ltd | Lancashire |
| Bang Consulting Ltd | |
| Bangor University | Gwynedd |
| Bangor University - School of Computer Science and Engineering | Gwynedd |
| Banks Digital Ltd | Greater Manchester |
| Bannerbridge Ltd | Essex |
| Banter Media Ltd | |
| Banxia Software Ltd | Cumbria |
| BAP Pharma Ltd | |
| Bar Code Data Ltd | Greater Manchester |
| Barclay Communications | Belfast |
| Barcode Connexions | Hertfordshire |
| Barcode Solutions (Europe) Ltd | East Riding of Yorkshire |
| Barcode Technologies Ltd | Hertfordshire |
| Barcode-IT Ltd | |
| Barcodes for Business Ltd | Oxfordshire |
| Barcodestore.co.uk | West Sussex |
| Bardford Web Design | West Yorkshire |
| Barefoot Web | East Sussex |
| Baresquare | |
| Bargain Hardware | |
| Bark Digital Ltd | |