Best LLM SEO Checking Tools in 2026: 9 Tools Compared

Semrush is the obvious first check for teams that already live in its platform. The AI Visibility Toolkit tracks prompt-level visibility across ChatGPT, Google AI features, Gemini and Perplexity, and compares your AI market share and sentiment against competitors.

The pricing shape is the thing to watch. At $99 per month per domain with 25 tracked prompts, a single brand is affordable, but an agency checking ten client domains pays ten times over. Choose Semrush when your SEO work already runs there. Choose a standalone checker when AI answers are your only gap.

Ahrefs Brand Radar is built for a different question from most tools here: not only how your brand appears, but how any brand appears. Its Brand and AI Search section tracks mentions, citations and sentiment across AI chatbots, which makes it useful for competitor research, market mapping and pitch preparation, not just your own reporting. The wider Ahrefs platform adds backlink data, keyword data and content tools around the same findings.

The entry price starts from $199 per month, and published comparisons note that all-platform access runs much higher, so confirm which tier a quote covers before budgeting. Ahrefs suits research-heavy teams. Smaller teams that only check their own brand will find cheaper options below.

Writesonic takes the position that a check without a fix is half a job. Its platform tracks visibility across eight AI platforms, then runs a loop of tracking, prioritizing, acting and proving, with results measured at day 14 and day 28 after each fix. That loop includes content agents, outreach agents and citation work, so a gap found in ChatGPT answers can turn into published content without leaving the platform.

The GEO entry price is $79 per month billed annually for 50 prompts, which is competitive for a tool that also writes and optimizes. If your bottleneck is acting on findings rather than finding them, Writesonic is the strongest fit in this list.

Nightwatch is a rank tracker first, and that history is its edge. Its Citation Intelligence feature joins the ranking record to the citation record, showing which ranking change moved your citations in ChatGPT, Claude, Gemini and Perplexity. Since AI models often cite pages that already rank, a lost ranking is often a lost citation a week later, and Nightwatch shows that chain directly instead of leaving you to reconcile two exports.

Starter costs 99 euros per month, or 79 euros billed yearly, for 500 keywords with 50 AI prompts included, and every plan includes unlimited seats, white-label reports and API access. The limit is engine breadth: four named models, not the dozen-plus lists some rivals offer.

Surfer AI Tracker fits teams that already write and optimize in Surfer. It monitors how your brand appears in AI search engines, including ChatGPT, Perplexity, Gemini and Google AI features, and frames results around a plain question: are you the answer buyers hear, or is a competitor? That framing works well in content meetings, where the next step is usually editing a page rather than debating a metric.

The catch is packaging. The AI Tracker is a $95 per month add-on for 25 prompts, on top of a Surfer plan, and separate AI Search Analytics packaging has been listed at different prices during 2026. Confirm the current bundle at checkout, including prompt count and refresh rate, before comparing it with standalone tools.

Rankability describes itself as an AI search visibility platform for agencies, and its packaging shows it. The Starter plan costs $97 per month and includes 100 daily tracked AI queries across 11 platforms, with client campaign tracking, content tools and website audits around the core checks. For an agency, that combination replaces a tracker plus a reporting tool plus a content brief tool.

The weakness for a first-time buyer is trial access. Its homepage does not publish a free plan or trial, so you cannot test your own prompts before paying without asking for a demo. Agencies, though, will likely find the reporting workflows worth the premium.

Goodie is a full answer engine optimization platform, not a simple checker. Its Explorer plan costs $399 per month billed yearly for 120 prompts, and covers visibility monitoring, sentiment and competitor positioning, plus optimization actions and a content studio for drafting AI-ready content. Its attribution features connect AI visibility to revenue, and its agentic commerce suite tracks product visibility in AI shopping experiences such as ChatGPT and Amazon Rufus.

The honest drawback is engine scope at entry level. Explorer tracks three engines, ChatGPT, AI Overviews and Perplexity, and reaching six or more engines requires higher tiers or an enterprise agreement. That makes Goodie a partial view at a premium price for teams whose buyers also use Claude, Gemini or Meta AI.

LLMrefs takes a different approach from prompt-first tools: you track keywords, not prompts. Import your SEO keyword list and the platform generates fan-out prompts from real conversations users have with AI chatbots, then aggregates responses, citations and brand data into share of voice and position metrics per keyword. That suits SEOs who already think in keywords and want AI visibility in the same terms as classic rankings.

The single All in One plan costs $79 per month and covers 500 prompts, all AI search engines with no extra engine fees, weekly reports, citation tracking, geo-targeting in more than 50 countries and unlimited projects and team members. The trade-off is refresh speed: keywords update at least weekly, so teams needing daily checks during a launch should pair it with a daily tracker or a one-off checker.

MentionChecker is the only tool here with no monthly subscription, and that alone makes it worth knowing. Your first check is free, then you buy credit packs from $9 for 50 credits, where one credit equals one answer from one AI engine. A check of 25 questions across four engines costs 100 credits, or $17, and credits last 12 months. You can run checks on demand or on a daily, weekly or monthly schedule, paid from your balance.

The product keeps every answer word for word, with your brand marked, and shows who else was mentioned and which sites the answers cited. Reports can be shared by link without a login, or downloaded as PDF, Markdown or JSON. It is not the cheapest route for heavy daily tracking, where a flat subscription wins, but for occasional checks it removes the subscription entirely.