| ACSData | Wellington |
| Actiontech | |
| ActionWeb | Northland |
| Activate Design Ltd | Canterbury |
| Activate Education Group | |
| Activate, Inc. | Auckland |
| ActiveVision | Auckland |
| Acwela | Nelson |
| Adaptable solutions | Auckland |
| Adcelerate | Auckland |
| Admin Express | |
| Administration Software Ltd | Auckland |
| Advanced Data Centres | |
| Advanced Networks Ltd | Auckland |
| Advanced Portable Technologies (1994) Ltd | Wellington |
| AdvancedIT | |
| Advantage | Manawatu-Wanganui |
| Advantage Business Software Ltd | Bay of Plenty |
| Advicelab | |
| Adviser CRM | |
| Aera VC | Auckland |
| Aerial & Satellite Installations Ltd | Canterbury |
| Aerial Master | |
| Affordable Computer Repair and Service Ltd | Canterbury |
| Affordable Computers Tasman Ltd | Tasman |
| Affordable Domains | Auckland |
| AffordIT | Auckland |
| AFT Pharmaceuticals | |
| Aftergame | |
| AGI Education Ltd | |
| Agile Utilities New Zealand Ltd | Auckland |
| AgileMind.nz | |
| Agility CIS | Auckland |
| AgResearch | |
| AgriTech New Zealand | |
| AgTech Hackathon | Manawatu-Wanganui |
| AI Forum of New Zealand | |
| Aider International Ltd | Auckland |
| Airways | |
| AIScorp | Wellington |
| Alaron Products Ltd | Nelson |
| Alchemy Group | Canterbury |
| ALCOM Communication Services | Bay of Plenty |
| Aldo Cortesi | Otago |
| Alexanders Advertising Ltd | Canterbury |
| Alexis InfoTech Management Ltd | Waikato |
| Alimetry Ltd | |
| All Over IT | |
| Allfields | Wellington |
| Alliance IT Solutions | |