Three Different Jobs, Not Three Competitors
Think of it less as a shootout and more as choosing the right vehicle for the job. Starlink is your high-speed ute, built to haul a big payload of data: cloud software, video calls, file transfer. Iridium and Inmarsat are the go-anywhere workhorses of the satellite world. They're not built for streaming, but they're unmatched for a voice call or a safety message that absolutely has to get through.
Buying Starlink for lone worker safety, or an Iridium phone to run a remote site office, are both common and avoidable mistakes. Match the tool to the actual job.
Starlink vs Iridium vs Inmarsat at a Glance
| Factor | Starlink | Iridium | Inmarsat |
|---|---|---|---|
| Primary role | High-speed data and internet | Voice, SMS, safety messaging | Voice, SMS, safety messaging |
| Satellite type | Low Earth orbit constellation | 66-satellite low Earth orbit constellation | Small number of geostationary satellites |
| Coverage | Near-global with a clear sky view | True pole-to-pole global coverage | Most of the globe, excluding polar regions |
| Terrain performance | Needs unobstructed sky view | Strong in valleys and mountains, satellites keep moving | Needs clear line of sight to the northern sky in NZ |
| Data speed | Broadband-capable, tens to hundreds of Mbps | Very limited, suited to text and basic messaging only | Limited, though some Inmarsat data terminals offer more than a standard phone |
| Typical NZ device cost | ~$799 hardware plus monthly plan | Iridium 9555 ~$2,595, Extreme 9575 ~$2,965, GO ~$2,101 | IsatPhone 2 ~$1,976 |
Iridium's advantage is its moving constellation. If a peak blocks the signal, another satellite is usually along within minutes. That makes it the stronger choice in Fiordland valleys, the Southern Alps, or the Southern Ocean. Inmarsat's fixed equatorial satellites give a very stable signal across most of New Zealand, but the signal comes from the northern sky, so anything blocking that direction, a steep south-facing slope, dense bush, can be a genuine limitation.
Choosing the Right One for Your Operation
Choose Starlink if
- You need broadband-class internet at a remote site, vehicle, or vessel
- Your team runs cloud software, video calls, or file transfer beyond cellular range
- You have a clear, unobstructed view of the sky at the install location
Choose Iridium or Inmarsat if
- Your primary need is guaranteed voice contact or emergency SOS, not data
- Your team works in genuinely remote terrain, including deep valleys or offshore waters
- You need to meet a lone worker safety obligation under the Health and Safety at Work Act 2015
Why Layering Beats Picking One
Relying on a single satellite system for everything is a genuine operational risk. The strongest approach for serious NZ operations, forestry crews, remote construction, commercial fishing vessels, is usually a hybrid: Starlink for primary data, and an Iridium or Inmarsat device as a dedicated, independent voice and emergency lifeline.
If your data connection goes down, your team still has a guaranteed way to call for help. If your phone can't reach a satellite from a blocked position, your Starlink-fed Wi-Fi and cloud systems keep the rest of the operation running. Neither one is a substitute for the other.
Getting the Right Advice Before You Buy
Mobile Systems Limited has supplied and supported communications equipment for NZ businesses for over 25 years, based in Mount Maunganui and working nationwide. We stock and advise on Starlink, Iridium, and Inmarsat hardware, and we'll tell you honestly if what you're asking for isn't the right fit for your terrain or use case.
