Free AI visibility checkers, honestly reviewed

Every free AI visibility checker answers the same question: does an AI engine say your name right now. That question is worth answering, and worth zero dollars, which is a good match. What no free checker can answer is the question you will ask five minutes later, which is how often, and that is where the honesty in this post lives.

What the free checkers actually give you

Each free tool caps something different. Here is what you get and where the wall is.

Pricing verified July 11, 2026. Vendors change pricing often — check theirs before buying.

A note on shape: these fall into two groups. Spottlo, Knowatoa, Ahrefs and Conductor offer a free artifact — you enter a domain, you get a report. AthenaHQ and Semrush offer a free tier of the real product — fewer credits or features, but the actual tool. The second kind is better for evaluating a purchase. The first kind is better for a fast answer with no signup friction.

Why one free check cannot be a measurement

Ask ChatGPT the same buying question five times and you can get five different vendor lists. The model samples from a probability distribution over tokens rather than reading a fixed ranking, so the output varies run to run. Perplexity varies too, because it re-retrieves sources each time. Google AI Overviews vary by query, location, personalization and whether the Overview fires at all.

This has a hard consequence: a single check is one draw from a random variable. If you appear in a free check, you might be a brand that appears 80% of the time, or one that appears 15% of the time and you got lucky. If you don't appear, you might be at 0% or at 40%. One sample cannot distinguish those cases, and no amount of nice UI changes that.

The only honest metric is a rate: mentioned in N of M runs, per prompt, per engine. That is what repeated sampling buys you, and it is fundamentally what you are paying a tracker for. Everything else in these products — dashboards, competitor grids, alerts — is presentation on top of that one idea.

Semrush's own panel makes the same point from the other direction: their more conservative study found AI Overviews on 15.69% of keywords in November 2025, having peaked at 24.61%, while BrightEdge measures roughly 48% of tracked queries. Both are real numbers from real panels. They differ because the sampling differs. If two research teams with large panels can land 30 points apart, your one-off check is not settling anything.

What a free check is good for

Four things, and they are genuinely useful.

A smoke test. If you run a free check on three of your core buying questions and your name never appears on any engine, you have learned something real and cheap. Do not overthink it. You have a presence problem, not a measurement problem.

Finding out who does appear. This is the most underrated output. When you ask "best project management tool for agencies" and the engine names four competitors and not you, that list is your competitive set as the model understands it — which may not match the competitive set in your pitch deck. We see this constantly in scan data: the brands showing up in AI answers are often the ones with the most third-party coverage, not the ones with the best product or the biggest ad budget.

Seeing the cited sources. Most free reports show which URLs the engine leaned on. That list is your content roadmap. If four of the five citations are listicles on sites you have never pitched, you now know what to do next week.

Justifying budget internally. A screenshot of your competitor being recommended by ChatGPT while you are absent moves a budget conversation faster than any deck. Especially given that 51% of B2B software buyers now start research in an AI chatbot and 33% bought from a vendor they had never heard of before the AI named it.

How to squeeze the most out of free checks

You can build a crude but real measurement out of free tools if you are willing to do the work by hand. It is tedious. It is also legitimate.

1. Write 5 to 8 real buyer questions. Not "project management software" — that is a keyword, not a prompt. Write "what's the best project management tool for a 12-person design agency," the way a human types it. See how to build a prompt set.
2. Run each prompt at least 5 times, in a fresh session each time. No memory, no chat history, no personalization. Log the result each run.
3. Do it on at least two engines. ChatGPT and Perplexity behave very differently, because one leans on training plus retrieval and the other retrieves aggressively per query.
4. Record mentions as a fraction, not a yes/no. "3/5 on ChatGPT, 1/5 on Perplexity" is a baseline you can compare against in six weeks.
5. Repeat monthly. Same prompts, same method.

That is about two hours of work per round. If two hours a month is cheaper than a subscription for you, do it manually and skip the tools entirely — we would rather tell you that than sell you something you don't need. If it isn't, that arithmetic is precisely the argument for a tracker: Spottlo exists to run those samples across four engines every week so you don't spend Saturday morning re-asking ChatGPT the same question twenty times.

The traps in free checkers

Vanity scoring. Some free tools output a single number out of 100. There is no shared definition of what that number means, it is not comparable across vendors, and it usually blends things that should be separate (mention rate, sentiment, citation count, domain authority). Look for the underlying counts, not the score.

Personalized results. If a free tool checks by asking an engine from an authenticated session with history, results skew. Fresh, logged-out sessions only.

Single-engine checks presented as "AI visibility." ChatGPT is enormous — 900M weekly active users and 50M paying subscribers as of February 2026 — but it is not the whole surface. Google AI Mode passed 1 billion monthly users in May 2026, and Perplexity was handling 780M queries a month as of its last official figure. A checker that only queries one engine is telling you about one engine.

Confusing "not cited" with "not mentioned." Being named in an answer and being linked in the sources are different events. Many brands get named with no link, which still drives demand — ChatGPT referral traffic rose 157.7% week over week after OpenAI added clickable brand links to answers, which tells you the mentions were already there before the links were. Make sure you know which one a tool is counting.

What to do next

1. Run a free AI visibility report on your brand, then run it twice more. If the answers differ, you have just learned the single most important thing in this post firsthand.
2. Write down every competitor the engines named that you did not expect. That list is more valuable than your own score.
3. Pull the cited URLs out of the report and check whether you are present on any of them. That is your next month of outreach.
4. If you need an ongoing number rather than a snapshot, compare the paid options in our roundup of AI visibility tools or the full comparison grid — including the free-tier paths at AthenaHQ and Semrush, which let you evaluate before you commit.
5. Decide honestly whether two hours a month of manual sampling beats a subscription for you. Sometimes it does.