HubSpot AI Search Grader (also called AEO Grader) is a completely free AI visibility tool from HubSpot, the publicly traded marketing platform company founded in 2006. HubSpot AI Search Grader runs reports across ChatGPT, Perplexity, and Gemini to grade brand presence with no trials, no credit card, and no usage limits.
If you're evaluating AI visibility tools, here's a detailed breakdown of how HubSpot AI Search Grader works and how it compares to Mentionable's full AI visibility stack.
How does HubSpot AI Search Grader track AI visibility?
HubSpot AI Search Grader works as a one-time report tool. You enter your brand name and business details, and HubSpot AI Search Grader runs dozens of test queries across ChatGPT (GPT-4o), Perplexity AI, and Google Gemini. A few minutes later, you get a comprehensive report.
The report includes four components. An overall grade (0-100) provides an at-a-glance score of AI visibility. The brand sentiment score analyzes the language AI uses when mentioning the brand. Share of voice measures how often the brand appears compared to competitors for similar queries. And a personalized analysis highlights strengths and areas for improvement.
Notably, HubSpot AI Search Grader does not track Claude (Anthropic) or Grok (xAI), two LLMs that are gaining significant market share in 2026.
HubSpot AI Search Grader generates its own test queries based on the brand information entered. Users cannot specify which exact prompts to monitor, and reports are snapshots rather than continuous tracking.
How much does HubSpot AI Search Grader cost in 2026?
HubSpot AI Search Grader is completely free. No hidden costs, no trial periods, no credit card required.
| Plan | Price | Reports | LLMs |
|---|---|---|---|
| Free | $0 | Unlimited | 3 (ChatGPT, Perplexity, Gemini) |
You can run unlimited reports, track multiple brands (including competitors), and access all features without ever paying. HubSpot built this as a lead generation tool for their marketing platform, so there is no charge.
What does HubSpot AI Search Grader do well?
HubSpot AI Search Grader is legitimately free with full functionality. This isn't a limited trial or freemium bait. For a quick health check of AI visibility, that's valuable and rare.
HubSpot AI Search Grader includes sentiment analysis, which most free tools skip. Knowing how AI describes a brand (not just whether it appears) matters when perception is as important as visibility.
HubSpot AI Search Grader lets you run reports on any brand, including competitors. Seeing how competitors score, which queries they win, and where they're weak provides useful competitive context.
Reports generate in 3-5 minutes with no waiting for daily or weekly updates. And HubSpot is a publicly traded company with a strong reputation, so the data is reliable and the tool is likely to be maintained long-term.
HubSpot AI Search Grader vs Mentionable: full feature comparison
HubSpot AI Search Grader and Mentionable both assess AI visibility, but HubSpot AI Search Grader provides free one-time snapshots while Mentionable provides continuous tracking with a full AI visibility stack.
| Feature | HubSpot AI Search Grader | Mentionable |
|---|---|---|
| Starting price | Free | €29/month |
| LLMs included | 3 (ChatGPT, Perplexity, Gemini) | 5 (ChatGPT, Claude, Perplexity, Gemini, Grok) |
| Claude tracking | Not available | Included in all plans |
| Grok tracking | Not available | Included in all plans |
| Tracking type | One-time snapshot reports | Continuous (2x per week) |
| Prompt generation | Auto-generated by HubSpot (not customizable) | AI auto-generates 15-20 prompts from URL (fully customizable) |
| Competitor intelligence | Share of voice comparison | Auto-extracted, normalized, ranked per LLM and per prompt |
| Source/citation tracking | Not available | Tracks all cited domains, highlights your site vs competitors |
| Content opportunities | Not available | AI-powered gap analysis with clustered content recommendations |
| AI traffic analytics | Not available | Tracking pixel identifies traffic from ChatGPT, Perplexity, etc. |
| Sentiment analysis | Included | Positive/neutral/negative per prompt per LLM |
| Overall score/grade | Yes (0-100 grade) | Not available |
| Custom prompt tracking | Not available | Full control over which prompts to track |
| Free trial | N/A (fully free) | 7 days, no credit card |
| Best for | Quick free health checks | Ongoing AI visibility monitoring |
What does Mentionable offer beyond basic tracking?
Mentionable is a complete AI visibility platform that goes well beyond mention monitoring. Here's what Mentionable includes in every plan:
Automatic prompt generation. Mentionable scans any website URL using AI and generates 15-20 relevant prompts based on the site's content and competitive landscape. No manual keyword research or prompt guessing needed. Users select which prompts to track, edit them, or add custom ones.
5 LLMs with no add-ons. Every Mentionable plan includes ChatGPT, Claude, Perplexity, Gemini, and Grok. There are no paid add-ons for additional LLMs. All 5 are scanned on every tracking run.
Competitor intelligence. Mentionable doesn't just check if your brand is mentioned. Mentionable's analysis pipeline extracts and normalizes every competitor mentioned alongside your brand, across all prompts and all LLMs. The competitor dashboard ranks them by mention frequency and shows exactly which prompts and which LLMs mention each competitor.
Source and citation tracking. Mentionable tracks every source domain that LLMs cite when answering prompts in your category. The sources page shows which websites AI considers authoritative in your space, and highlights whether your own domain is being cited or not.
Content opportunity analysis. Mentionable's fan-out pipeline uses AI to decompose each tracked prompt into 5 related search queries, deduplicates them across all prompts, clusters them by topic and intent type (comparative, how-to, definitional, transactional), and ranks them by priority. Each cluster represents a content piece to create or optimize for better AI visibility.
AI traffic analytics. Mentionable provides a tracking pixel that identifies website visits coming from LLMs. Since most AI-referred traffic appears as "direct" in Google Analytics, Mentionable's pixel correctly attributes visits from ChatGPT, Perplexity, Gemini, Grok, and Claude.
Sentiment analysis. Every prompt result includes sentiment classification (positive, neutral, or negative) per LLM, so brands know not just if they're mentioned, but how they're mentioned.
Mentionable Starter costs €29/month for 15 prompts across 5 LLMs. Mentionable Pro costs €89/month for 50 prompts and 3 projects. All plans include a 7-day free trial with no credit card required.
Which tool fits your needs?
HubSpot AI Search Grader makes sense if:
- You want a quick, free health check of AI visibility with no commitment
- You need to audit competitor AI visibility at no cost
- You want an overall grade (0-100) as a simple benchmark
- You care most about ChatGPT, Perplexity, and Gemini coverage
- You don't need ongoing monitoring, just occasional snapshots
- You want sentiment and share of voice analysis included for free
Mentionable makes sense if:
- You want continuous tracking, not just one-time snapshot reports
- You want all 5 major LLMs included, including Claude and Grok
- You want AI-generated relevant prompts with full control over what gets tracked
- You need competitor intelligence, source tracking, and content opportunities in one tool
- You want AI traffic analytics to see which LLMs actually send visitors
- You're a solopreneur or growing brand looking for a complete AI visibility stack under €100/month
HubSpot AI Search Grader and Mentionable serve complementary purposes. HubSpot AI Search Grader is the best free snapshot tool available for a quick baseline across 3 LLMs. Mentionable is a full AI visibility stack for continuous monitoring across 5 LLMs with competitor intelligence, source tracking, content opportunities, and AI traffic analytics. Many users start with a free HubSpot AI Search Grader report to understand their baseline, then use Mentionable for ongoing tracking and actionable insights.
