Is There a Free Way to Check If My Brand Is Mentioned in ChatGPT or Perplexity Answers?

Yes. You can find out whether ChatGPT, Claude, Gemini, and Perplexity mention your brand without spending a dollar, and the first useful answer takes about ten minutes. What free will not give you is measurement: a number you can watch move, defend in a board meeting, or connect to a sale.

It matters because the research has moved. 71 percent of B2B buyers now rely on AI chatbots when they research software. If you are absent from those answers, you are absent from the shortlist before a human ever sees your site.

Three free routes get talked about. There is a fourth that most people skip, and it is the one that decides whether the other three were ever going to work.

Option 1: Ask the engines yourself, logged out

Open a private browsing window, log out of every AI account, and type the exact question your buyer would type. Not your brand name. The buying question: "best [category] tool for [use case]." Then read which companies get named and in what order.

Cost: zero. Time: five minutes per question.

The trap that ruins most DIY checks is testing while logged in. ChatGPT memory, custom instructions, and your own chat history will happily surface your brand because you have discussed it fifty times. That is a false positive, and it is the single most common reason a founder concludes they are visible when their buyers are seeing competitors instead. Location matters too, since the engines infer where you are and adjust the shortlist.

The deeper limit is statistical. Answers are non-deterministic: the same prompt, run twice, genuinely returns different companies, because retrieval shifts and consumer engines do not run at zero temperature. One run is one draw from a distribution. The metric that means something is mention rate, the percentage of runs in which you appear, plus your position inside the answer, and you cannot get that by hand without turning it into a part-time job.

Also: do not change your wording between checks. Phrasing is one of the biggest drivers of which brands appear, so a reworded prompt destroys any before-and-after comparison you were hoping to make.

Verdict: best for discovery and for the gut punch that starts a strategy. Useless as a baseline.

Option 2: Run a free AI visibility checker

Most AEO vendors now offer a free one-time checker as a lead magnet, ours included. Paste a URL, the tool asks buying questions across the engines, and you get back which companies were named and whether you were one of them. Our version is the AI Visibility check: free, no account needed, and the full result unlocks with your name, work email, and company. If you want the walkthrough before you run it, we wrote up what a free visibility check actually shows you.

What you are getting is a clean, logged-out, unbiased sample, which is exactly what hand-testing cannot give you. What you are not getting is history. Free checkers across this category share the same shape: auto-generated prompts rather than your buyers' real questions, limited engine coverage, no retained answers or source links, and no trend line, because a snapshot has nothing to compare itself to. This is one snapshot. Clark runs it continuously.

Be skeptical of any free tool that hands you a composite "visibility score" out of 100. There is no industry definition of that number, it cannot be validated, and it cannot be compared across vendors. We deliberately do not publish one. Mention rate, average position, and the competitor names in the answer are auditable. A proprietary score is a feeling with a decimal point.

Verdict: the fastest honest baseline. Use it, screenshot it, date it.

Option 3: Check whether AI traffic is already reaching your site

The other free move looks at the traffic side instead of the answer side. In your analytics platform, build a custom channel group or comparison that matches referrer hostnames like chatgpt.com, perplexity.ai, claude.ai, and gemini.google.com. Most analytics setups dump those into generic referral or social buckets by default, so this traffic is usually already there and undercounted.

Two structural gaps. Zero-click mentions produce no session at all, so being recommended and getting no visit looks identical to not being mentioned. And in-app browsers strip referrers, which is why so much real AI traffic lands as direct. Your analytics also never sees the prompt, so it cannot tell you which question earned the visit.

Verdict: the only free way to confirm AI referrals are real on your site. It will undercount, and it stops short of revenue.

The fourth check, the one almost everyone skips: can the crawlers reach you?

Before you optimize a single sentence, confirm you are not mechanically invisible. OpenAI runs separate agents for training, for the ChatGPT search index, and for live fetches, so a blanket robots.txt block often removes a site from ChatGPT search when the owner believed they only opted out of training. Anthropic and Perplexity run their own distinct crawlers. Cloudflare now blocks AI crawlers by default for new domains, which means plenty of sites are locked out without anyone deciding to be. Check the CDN and firewall rules, not just robots.txt. And if your content renders client-side, several crawlers will never see it.

All of that is free to inspect, and it is the highest-leverage thirty minutes on this list. Our AI Readiness check weights crawler access at 30 percent of the score for exactly this reason: it is the one failure that makes every other fix pointless.

Which free method should you pick?

• Pick hand-testing if you need to know today, on one question, whether you exist in the answer.
• Pick a free checker if you want a logged-out baseline across engines that you did not bias yourself.
• Pick the analytics work if you already publish content and want to know whether AI is sending anyone.
• Do the crawler audit regardless. Absence caused by a firewall rule will not be fixed by better writing.

Where free stops

Free tells you whether you are in the answer. It cannot tell you whether being in the answer produced a dollar, and that gap is the whole problem. An AI answer hands back a shortlist, not ten blue links. There is no page two, so absence costs more than a ranking drop, and presence is worth measuring properly rather than celebrating once.

Here is what the full loop looks like when it closes. Bosten Shoes went from unmentioned to the number-one recommended leather shoe brand in El Salvador, and saw its first ChatGPT-attributed sale in under 30 days. Their CEO put it plainly: "We beat big shoe companies and started seeing conversions from ChatGPT in less than 30 days." No free checker could have told them that. A checker names the brands in an answer. Tying an engine to a post to a closed sale is a different job.

That is the line we draw. Our free tier stays free forever, no credit card: three tracked questions on ChatGPT, one on-demand visibility check per rolling week, and the last seven days of attribution data. It is a diagnosis, not a program. Daily monitoring across all four engines with your questions rotating through the week, the answers and their sources kept as receipts, and revenue tied back to the exact engine and post start on a paid plan.

Run the free check first. If four competitors get named and you do not, you already know what the next quarter is for.