Best Free AI Visibility Checkers (and What Each One Misses)

Free AI visibility checkers come in two kinds that answer completely different questions, and most people don’t realise they’re mixing them up. Technical-readiness checkers test whether AI engines can crawl and quote your site. Mention checkers ask the engines your prompts to see whether you’re currently named. You want one of each — and neither costs anything. Here’s how they differ, the main free options, and an honest note on where our own checker fits and where it doesn’t.

The two kinds of free checker

	Technical-readiness checker	Mention checker
Question it answers	Can engines crawl, read and quote me?	Am I currently mentioned in AI answers?
How it works	Fetches robots.txt, schema, sitemap, HTML; scores access	Queries ChatGPT/Perplexity/etc. with prompts; reports mentions
Reliability	High — tests verifiable facts	Directional — LLM answers vary run to run
Best for	Diagnosis and fixing	Current standing and competitor gap
Example	The Answer Rankings checker	Ahrefs, Mentionable, Omnia and others

The mistake is running only one. A mention checker tells you you’re invisible but not why; a technical checker tells you why but not whether the fix moved the needle in the engines. Run the technical check to diagnose, fix the issues, then use a mention check to confirm you’re starting to appear.

Technical-readiness checkers

These test the mechanics — the part you can actually control and fix.

• Answer Rankings checker (ours) — fetches your robots.txt, llms.txt, sitemap and homepage and scores six AI crawlers for access plus your structured data, content signals and discoverability, on a 100-point scale. Free, no signup, 5 checks/day. What it does not do: it doesn’t ask the engines whether you’re currently mentioned — that’s the mention checkers’ job. We think diagnosis is the more useful free step, because it’s the part you can act on, but use both.

Being honest about our own limits is the point: a readiness score of 100 means engines can cite you, not that they are yet. That’s why the next section matters.

Mention checkers (free tiers and no-signup tools)

These ask the engines directly. Treat results as a noisy snapshot, not a stable score:

• Ahrefs AI Visibility Checker — queries ChatGPT, Gemini, Perplexity, Copilot and Google AI Overviews with search-backed prompts; no signup, results in seconds.
• Mentionable — free scan across several major LLMs, results in minutes.
• Omnia — free report for your domain (email required).
• Birdeye — free version evaluates ChatGPT visibility.

Most paid trackers (Otterly, Visiblie and others) also offer a free tier or trial if you want ongoing monitoring — but see best AI visibility tools first, because you rarely need to pay until the basics are fixed.

The honest workflow (all free)

1. Diagnose: run the technical check — it lists exactly what’s blocking or weakening you.
2. Fix: action the issues — crawler access, server-rendered content, schema.
3. Confirm: run a mention check (Ahrefs/Mentionable) and ask ChatGPT and Perplexity your five real “best X” questions; note whether you now appear.
4. Only then consider a paid tracker to monitor progress continuously.

That sequence costs nothing until step 4, and most small businesses never need step 4.

Frequently asked questions

Which free checker is best? Whichever matches your question — a technical checker to find and fix problems, a mention checker to see if you’re currently named. Run one of each.

Are the free results accurate? Technical checks are reliable (verifiable facts). Mention checks are directional, because model answers vary between runs — judge them on repeated checks, not one.

Is free enough, or do I need to pay? Free is enough to diagnose and fix. Paid tracking only earns its keep once you have optimization to monitor — the tools guide covers when that point arrives.