Best free AI visibility checkers (2026)
Free AI visibility checkers do not all measure the same thing. Some run an answer-engine snapshot. Some grade whether your site is readable and citable. The right first tool depends on whether you need a baseline, a technical fix list, or an ongoing monitor.
We make Sonarvue, so this is not neutral in the abstract. The table is still useful because it separates public claims by job: answer snapshot, site-readiness check, local visibility report, and ongoing monitor. Verify each vendor's current limits before relying on it.
The short answer
If you want a quick brand snapshot across major AI answer engines, Ahrefs and HubSpot are the strongest public free-checker references today. If you want to know whether your site is structured for AI crawlers before you monitor the answers, start with Sonarvue's free AI visibility check. If you are a local or multi-location business, Birdeye is a better fit than most B2B SaaS-oriented tools.
Comparison table
What each checker actually checks
Sonarvue
Free scope: Instant site AI-readiness grade with no email, plus a trial scan and report for one brand.
Engines or surface: Trial scan: initial answer set. Starter/Growth add ongoing monitoring across all eight default engines.
Best for: Founder-led B2B teams that want a no-install path from free check to ongoing monitoring.
Watch out for: The instant widget checks crawlability, schema, llms.txt, and answer-ready structure. The answer-engine read starts after signup.
Ahrefs AI Visibility Checker
Free scope: No-signup brand visibility snapshot with mentions, platform breakdowns, topics, cited domains, and cited pages.
Engines or surface: ChatGPT, Gemini, Perplexity, Copilot, Google AI Overviews, and Google AI Mode.
Best for: Fast brand-level checks backed by Ahrefs' large prompt/index dataset.
Watch out for: The free tool is a limited preview. Ongoing monitoring and custom prompts sit in Brand Radar.
HubSpot AEO Grader
Free scope: Free one-time diagnostic that scores brand representation and returns a written interpretation after a form.
Engines or surface: OpenAI model, Perplexity, and Gemini, according to HubSpot's public grader page.
Best for: Marketing teams that want a quick AEO score and may graduate into HubSpot AEO.
Watch out for: It is a snapshot. HubSpot positions the paid AEO product as the ongoing monitor.
Amplitude AI Visibility Report
Free scope: Free report with visibility score, sentiment, competitive rankings, critical topics, and recommendations.
Engines or surface: Public page mentions top AI platforms including ChatGPT and Google AI Overview.
Best for: Teams that want to connect AI visibility to product analytics and downstream conversion data.
Watch out for: The public page frames the report as a lead form and a bridge into Amplitude Analytics.
Birdeye AI Visibility Checker
Free scope: Complimentary AI visibility report for one location, with score, citations, competitor insights, and recommendations.
Engines or surface: Free version evaluates ChatGPT; full Search AI expands to Gemini and Perplexity.
Best for: Local and multi-location businesses where listings, reviews, and location data matter.
Watch out for: Less suited to B2B SaaS category prompts because the product is built around local search signals.
Ubersuggest AI Search Visibility
Free scope: AI search visibility entry point that asks for website and brand, then surfaces AI result opportunities.
Engines or surface: Public page references ChatGPT and Gemini in the checker interface.
Best for: Teams already using Ubersuggest or NP Digital workflows.
Watch out for: The public page is less explicit about free report depth, limits, and ongoing monitoring cadence.
How to choose
Pick the checker by the decision you are trying to make. A brand mention snapshot answers, "Do AI engines name us today?" A site readiness grade answers, "Can AI crawlers understand and cite our pages?" A monitoring product answers, "Is this changing over time, and what should we fix next?"
For most B2B teams, the sequence is simple: run a site readiness check, run an answer-engine baseline, then monitor a fixed prompt set weekly or daily. That prevents the common trap of treating one lucky ChatGPT answer as a channel metric.
Where Sonarvue fits
Sonarvue is strongest when you want the free check to become a monitor rather than a dead-end report. The instant widget grades the signals you control: crawler access, schema, llms.txt, titles, headings, and answer-ready structure. The trial scan then checks the answer itself for one brand and returns a report.
If you need a zero-signup public answer snapshot, Ahrefs is a stronger fit. If you want a form-gated AEO score with a path into HubSpot AEO, HubSpot is the obvious option. If you want a founder-friendly monitor with all eight default engines on the paid Starter tier at $49/mo, use Sonarvue. For the full fit breakdown, read the HubSpot AEO Grader alternative, Semrush AI Visibility Toolkit alternative, or the Ahrefs AI Visibility Checker alternative.
Frequently asked
What is a free AI visibility checker?
A free AI visibility checker is a diagnostic that shows whether AI answer engines can find, mention, cite, or understand a brand. Some check the actual AI answers. Others check site-readiness signals such as schema, llms.txt, and crawler access.
Which free AI visibility checker should I use first?
Use an answer snapshot when you want to know whether ChatGPT, Gemini, Perplexity, or AI Overviews name your brand right now. Use a site AI-readiness checker when you want to fix crawlability, schema, llms.txt, and answer-formatted content before monitoring.
Is a one-time AI visibility check enough?
No. A one-time check is useful for a baseline, but AI answers move by prompt wording, retrieval source, model, geography, and time. Ongoing monitoring is needed once the channel matters.
What should a good free AI visibility report include?
At minimum, it should explain whether the brand is named, which engines were checked, which competitors appear instead, which sources influence the answer, and what to fix next.