Copilot vs ChatGPT: which one belongs in your business?

The difference that actually decides it

Copilot appears inside Word, Excel, Outlook, Teams and PowerPoint. It can see your documents, your email and your calendar because it lives in the same tenancy. There is no new tab, no new login, and no new habit.

ChatGPT is a separate destination. It is more capable in almost every direct comparison, and using it means leaving whatever you were doing, pasting context in, and coming back with the output.

That sounds like a small friction. In rollouts it is the single largest factor in whether anything gets used at all, which is the same finding as what separates an AI app people use from one they abandon.

Copilot has a structural advantage that has nothing to do with the model: it is already where your team is working.

Where each one wins

What it costs an Australian business

Copilot is licensed per user per month on top of your existing Microsoft 365 subscription. That is the part businesses most often misread: it is an addition, not an upgrade you were partly paying for already. For a team of twenty it is a material annual line item, so it deserves a genuine pilot rather than a blanket rollout.

ChatGPT is around AUD $30 per user per month for the paid individual tier, with business tiers costing more and adding admin controls and the commitment that your data is not used to train public models.

The comparison worth running is not price against price. It is price against adoption. A cheaper tool nobody opens costs more than an expensive one everybody uses, and current pricing for both is on the vendors' own pages rather than in an article that will date.

The rollout mistake we see most

Buying licences for everyone on day one. Adoption is not uniform: in every rollout we have run, a small group uses it constantly, a larger group uses it occasionally, and some never open it. Buying for the whole company before knowing which group is which is how a large unused licence bill happens.

Start with ten to fifteen people who actually want it, in roles where the work is document-heavy. Measure over a month. Then expand to the roles where it demonstrably worked rather than to everyone at once.

Data, and what Australian businesses should check

Copilot operates inside your Microsoft tenancy and respects the permissions already configured there, which is genuinely reassuring and also a warning. If your file permissions are loose, Copilot will surface documents to people who technically had access but would never have found them. Several rollouts we have seen turned into a permissions audit first, and that was the right outcome.

For ChatGPT, use the business tier for anything involving client data. Consumer tiers have less favourable defaults and are not worth the saved subscription. Your obligations under the Australian Privacy Principles do not change because a third party is doing the processing.

The honest recommendation

Run Microsoft 365 and want the fastest path to actual usage? Pilot Copilot first. The habit-change problem is already solved and that is worth more than a capability edge.

Need the strongest general assistant, or you are not a Microsoft business? ChatGPT, and add Claude if the work is writing or documents.

Most businesses over about thirty people end up with both, and that is a reasonable outcome rather than a failure to decide. What is not reasonable is buying either without a plan for what it is meant to change, which is where we usually start.