What's an Internet Service Provider (ISP)?

An internet service provider, or ISP, is the company that sells and supports your internet connection. In Australia, that often means a retailer that gives you access to the NBN or another broadband technology at your address.

Quick answer: what is an ISP?

An ISP is the company that provides your internet service. It handles the plan you pay for, customer support, billing and often the modem or setup terms. On the NBN, the ISP is usually the retail provider rather than the wholesale network operator.

ISPs are not all the same

Even when two providers use the same underlying network, they can differ on:

• price;
• speed-tier options;
• typical performance;
• contract terms;
• support quality;
• modem arrangements.

That is why comparing ISPs still matters even on the same wholesale network.

ISP comparison in Australia usually means retail comparison

For many households, the practical decision is not which network exists, but which ISP sells the right plan on that network for the address.

How to compare ISPs properly

1. Check what service types are available at your address.
2. Choose the speed tier your household actually needs.
3. Compare ISPs on the same service and tier.
4. Look beyond promo pricing.
5. Consider support and contract style as part of the choice.

For CompareUs users, the next steps are the internet comparison hub, the NBN explainer guide, and the internet value calculator.

Common mistakes when comparing ISPs

A common mistake is assuming every ISP is effectively identical. Another is comparing different speed tiers. A third is ignoring support quality until something goes wrong.

How CompareUs can help next

If you are trying to understand what an ISP is, the practical next step is to compare a few providers at your address using the same broadband assumptions.

Sources and methodology

This guide was prepared using standard Australian broadband comparison logic and current NBN retail context. It is intended as a practical explainer, not a ranking of one ISP over another.