| Antibody Software | Bay of Plenty |
| Anyware Computer Accessories New Zealand | Auckland |
| Anyware Ltd | Wellington |
| ANZ Bank New Zealand Ltd | Auckland |
| Aotea Web Hosting | Wellington |
| Aotearoa Web Design | Canterbury |
| Apex Digital Ltd | Taranaki |
| Applicable Ltd | Auckland |
| AppMani | Manawatu-Wanganui |
| Approval Donkey | Auckland |
| AppThat | Bay of Plenty |
| Aquila Technology Ltd | Wellington |
| Ara Institute of Canterbury | Canterbury |
| ARANZ Medical Ltd | |
| ArcAngels, Inc. | Auckland |
| Ardito Corporate Training | Waikato |
| Arise Software Ltd | Waikato |
| Arkadvance | Auckland |
| Aroa Biosurgery Ltd | Auckland |
| Arotec Diagnostics | Wellington |
| Arteria Creative | Auckland |
| Artificial Intelligence Researchers Association | |
| ASB Bank Ltd | Auckland |
| Ascona | Waikato |
| ASoft Ltd | Auckland |
| ASPect Information Solutions Ltd | Hawke's Bay |
| Aspire2 International | |
| Assura Software | Canterbury |
| Assurity | Auckland |
| Astrix Astronautics | Auckland |
| ASTROLAB | Auckland |
| Astute Software Products Ltd | Nelson |
| Athena X Ventures | Auckland |
| Atlas Gentech (NZ) Ltd | Auckland |
| ATMC New Zealand | |
| Atomic.io Ltd | Wellington |
| Auckland Institute of Studies | |
| Auckland University of Technology | Auckland |
| Augen Software Group | Auckland |
| Auldhouse | Auckland |
| Aura Ihformation Security | Wellington |
| Aurora Design Ltd | Auckland |
| Austin Digital | Auckland |
| Authsignal | Auckland |
| Automation Creation Ltd | Waikato |
| Automation Systems Ltd | Auckland |
| Automotive computer services | Auckland |
| Avalia Immunotherapies | Wellington |
| Avasa | |
| Avatar Ltd | Canterbury |