| Aviation Security Service | |
| Axio | Auckland |
| Axos Systems Ltd | Wellington |
| Ayone Computers Ltd | Auckland |
| Azora Biosciences | |
| Aztech Solutions Ltd | Auckland |
| Babelscribe.com | Marlborough |
| Bad Company Ltd | Bay of Plenty |
| Baden Electronic Services Ltd | Auckland |
| Baksoft Group | Waikato |
| Bank of Baroda (New Zealand) Ltd | Auckland |
| Bank of India New Zealand | |
| Bank of New Zealand | Auckland |
| BankLink | Auckland |
| Banzpay | Auckland |
| Barcode Products Ltd | Auckland |
| BarNet Internet | Auckland |
| Barron’s Equipment Rental Ltd | Auckland |
| Bay Software Solutions | Hawke's Bay |
| BayCity Communications | Canterbury |
| BayCity Communications Ltd | Canterbury |
| Baycom Communications | Bay of Plenty |
| BC Systems Consultancy Ltd | Otago |
| BCS Computer Solutions Ltd | Auckland |
| bdEnergy | |
| Be Seen Online | Auckland |
| Belton | Auckland |
| Benge Web | Wellington |
| Bernall Digital Design | Auckland |
| Beweb | Auckland |
| Beyond Recruitment | Auckland |
| BinaryMist Ltd | |
| Bio-Start Ltd | |
| Biocell Corporation | |
| BioFab | |
| BioinfoTools | Otago |
| BioOra Ltd | |
| BioPacific Partners Ltd | |
| Biosouth New Zealand | |
| BioTech New Zealand Association | |
| BioValeo Ltd | |
| BioViros Ltd | |
| BizDojo | |
| Bizweb | Auckland |
| Black Pearl Mail | Wellington |
| Black Rock Consulting Ltd | Otago |
| Black Sheep Creative Ltd | Waikato |
| Blackpepper | Auckland |
| Blis Technologies | |
| Blockchain Funds | Auckland |