| Snipesoft Ltd | Auckland |
| Snowball Effect | Auckland |
| Soda, Inc. | Waikato |
| SoEasy | Bay of Plenty |
| Softeryx Software Solutions | Auckland |
| Softpro Ltd | Auckland |
| Softsource Ltd | Auckland |
| Software Applications Ltd | Auckland |
| Software in Action Ltd | Auckland |
| Software Solutions Rotorua | Bay of Plenty |
| Software X | Canterbury |
| Solid Documents Ltd | Nelson |
| Solnet Solutions Ltd | Auckland |
| Solution Dynamics Ltd | Auckland |
| Solutionists Ltd | Auckland |
| Somar Digital | Wellington |
| Sony New Zealand Ltd | Auckland |
| Sound Business Systems | Auckland |
| Southern Computer Services | Southland |
| Southern Institute of Technology | Southland |
| SpamBlocker | Wellington |
| Spark New Zeland Ltd | Auckland |
| Spark NZ | Canterbury |
| Sparkbox Venture Group | Auckland |
| Sparkbox Ventures | Auckland |
| Sparks Interactive | Auckland |
| SpatialMedia Ltd | Auckland |
| Specialised Machine Software Ltd | Canterbury |
| SpeedCurve Ltd | Auckland |
| SpeEDI Software | Bay of Plenty |
| Spinco Technology Ltd | Waikato |
| Spinning Planet | Manawatu-Wanganui |
| Spiral Web Solutions Ltd | Wellington |
| Springload | Wellington |
| Springtimesoft Consulting | Wellington |
| Sprocket Digital | Auckland |
| Sprocket Web Design | Nelson |
| Sprout Agritech Ltd | |
| Squid Group | Auckland |
| SR | Intellectual Property | |
| SSS | Wellington |
| StaffCV | Auckland |
| Starlinks | Auckland |
| Startup Christchurch | Canterbury |
| Startup Dunedin | Otago |
| Startup NZ Entrepreneurs Program | Otago |
| Startup Queenstown Lakes | Otago |
| StationPlaylist.com | Bay of Plenty |
| Stellar Web Works Ltd | Nelson |
| StercusSoft Ltd | Auckland |