For most businesses, ChatGPT matters most, and it is not close. It carries the largest share of AI assistant use, so a mention there reaches more buyers than the other two combined. Gemini matters second because it feeds Google AI Overviews. Claude matters least by volume, but the people using it skew technical and high value.
Pick one channel to win before you spread across three. Teams that chase all three at once usually end up invisible in all three.
Claude vs ChatGPT vs Gemini: which should you target?
| Channel | Why it matters | Who should target it first |
|---|---|---|
| ChatGPT | Biggest audience of the three. A citation here reaches the most people. | Almost everyone. Default choice. |
| Gemini | Feeds Google AI Overviews, so wins here show up inside normal Google results. | Anyone who already gets Google traffic and is watching it fall. |
| Claude | Smaller audience, heavily weighted to developers, analysts and technical buyers. | B2B software, dev tools, technical services. |
The honest version: if you sell to plumbers, stop reading about Claude. If you sell an API, Claude might be worth more per mention than ChatGPT.
Why ChatGPT is the default answer
Reach. That is the whole argument.
Every mention in a ChatGPT answer sits in front of more potential buyers than the same mention anywhere else. When we looked at how ChatGPT selects sources, the pattern was clear enough to build a strategy on: it leans on pages other people wrote about you.
Start there unless you have a reason not to.
When Gemini deserves your attention first
Gemini is the one people underrate, because they think of it as a chatbot. It is also the engine behind AI Overviews, which sit above normal search results.
So if your Google traffic is sliding and you cannot work out why, Gemini is your channel. Fixing your visibility there shows up in the search results you already care about. Our notes on how AI Overviews change click-through rates cover what that drop actually looks like.
When Claude is worth it
Claude has the smallest slice of the three. It also has the buyers who read documentation before they book a call.
For a dev tool or a technical B2B product, one Claude citation can be worth more than five elsewhere, because the person reading it is closer to the decision. Our guide on how to rank in Claude goes through the mechanics, and if you are shopping for tracking, we compared Profound against Evertune for Claude and found most tools do not cover it on entry plans.
The good news about picking one
The work overlaps.
All three read the open web. All three lean on pages other people published about you. Get named in a solid roundup and you tend to show up in more than one place, because they are drinking from similar wells.
So picking a channel is really about where you measure first, not about doing three separate jobs. Check the AI search market share numbers for your sector, pick the biggest one, and go.
Pro tip: ask the same buying question in all three, today. Write down who gets named. If the same three competitors appear everywhere, you have one problem to fix, not three.
Key takeaways
- ChatGPT first for most businesses. Biggest audience.
- Gemini first if your Google traffic is dropping, because it feeds AI Overviews.
- Claude first only if you sell to technical buyers.
- The underlying work is mostly the same across all three.
- Measure one channel properly rather than three badly.
Not sure which channel is costing you deals?
Run a free AI visibility check and see which engines name you today, or look at how we handle it.
Frequently asked questions
Which AI search engine should I optimise for first?
ChatGPT, for most businesses, because it reaches the largest audience of the three. Choose Gemini instead if your Google traffic is falling, since Gemini feeds Google AI Overviews.
Is Claude worth optimising for?
Yes if you sell to developers, analysts or technical buyers, where Claude use is concentrated. For consumer and local businesses it is usually the last of the three to worry about.
Do I need a different strategy for each AI engine?
Mostly no. All three draw on the open web and on third party pages that mention your brand, so the same work tends to move several at once. What changes is where you measure and which sources carry weight.
Does ranking in Google still help with AI search?
It helps, particularly with Gemini and Google AI Overviews, which draw on Google’s index. But strong Google rankings alone do not guarantee citations, because the engines also weigh third party mentions.
How do I know which engine my buyers use?
Ask them, and check your referral traffic for AI sources. Failing that, judge by audience: technical buyers lean to Claude, general consumers to ChatGPT, and Google-heavy researchers to Gemini through AI Overviews.
