Do you need an llms.txt file to get found by AI?

Short answer: probably not. Honest answer: it's more interesting than that.

If you've read anything about getting your business found by AI tools like ChatGPT, Gemini or Perplexity, you may have bumped into a confident piece of advice: "Add an llms.txt file to your website." Some agencies will even sell you one.

Here's the plain-English truth, with the hype stripped out.

What is it, in one sentence?

An llms.txt is a simple text file you put on your website that summarises what your business does — written for AI to read instead of people. The idea, proposed back in 2024, is logical enough: hand the machines a clean cheat-sheet and maybe they'll understand and recommend you more often.

Logical. But does it actually work?

The uncomfortable part

For getting mentioned in AI answers today, the honest answer is: there's no evidence it helps. The major AI engines don't appear to read it. One analysis of around 300,000 websites found no link between having the file and being mentioned by AI — the file added nothing the data could detect. Google's own search team has said it plainly: no AI system uses llms.txt right now. One Google expert even compared it to an old SEO trick everyone abandoned years ago.

So if someone promises an llms.txt will get you into ChatGPT, be sceptical.

But it's not snake oil either

Here's where it gets genuinely interesting — and why we haven't written it off completely.

In May 2026, Google's Chrome team added a check for llms.txt to its developer tools, calling it an "emerging convention" worth watching. And they treat a missing file as "no problem", not a mistake. So Google's search side says "skip it", while Google's browser side says "watch this space". When a company that big can't agree with itself, the honest takeaway is: nobody knows yet.

A few things are true at once: some AI assistant and coding tools genuinely do read these files when pointed at them, big names like Anthropic and Stripe publish one, and adoption is slowly growing. It's cheap, it's harmless, and it might matter more later.

The trap almost everyone falls into

Having an llms.txt is not the same as an AI actually reading it. When you see "Anthropic and Stripe use llms.txt!", that mostly means they publish one for their own developer documentation — not that it's getting them quoted in AI answers. Supply is not demand. Don't mistake a file existing for a file working.

So what should your business actually do?

• Don't pay anyone who promises an llms.txt will get you into AI search. The evidence isn't there.
• Don't lose sleep if you don't have one. It is not holding you back today.
• If your website tool can generate one automatically and for free — sure. Treat it as cheap insurance for the future, not a growth lever.
• Put your real energy where it moves the needle: write genuinely useful pages that answer the real questions your customers ask, earn mentions and reviews across the web, and keep your site fast and easy for both Google and AI to read. That's what gets you cited — today and tomorrow.

Our take

This is exactly how we treat llms.txt inside Clareo. We check whether you have one, because it's worth knowing — but we weight it lightly, and barely penalise a missing one. The evidence is thin, so we say so.

That's our rule for everything we measure: if something is hype, we'd rather tell you the truth than sell you a checkbox. Getting found by AI isn't about secret files. It's about being genuinely worth finding — and we'll show you, honestly, where you stand.