What are the best AI visibility tools for content gap analysis?
The best AI visibility tools for content gap analysis, ranked: finding prompts where rivals are answered and you are not, plus pricing and who each tool suits.
A content gap in AI search is a question your buyers ask, that engines answer, and where your brand or your content is missing. It differs from a classic keyword gap in an important way. The unit is the prompt and the answer, not the keyword and the ranking. A good content gap tool looks at what competitors are cited for, what the engines say, and which prompts leave you out, then tells you what to publish or fix.
What a good gap analysis needs
Competitor prompts and citations. Which prompts name competitors but not you, and which of their pages get cited.
Real prompt demand. Some prompts are asked often and others hardly at all. Volume and difficulty data keep you from writing for questions nobody asks.
Query fan-outs. Engines often split one question into several narrower searches. The gaps are frequently in those sub-questions.
Coverage scoring. A way to see how well your existing pages answer a topic, so you can refresh rather than always write new.
Actions. A prioritized list, not a spreadsheet of 400 rows.
A route to publishing. The best gap analysis is only as good as the speed with which you can close the gap, with human review before anything goes live.
The ranking
1. Promptwatch
Promptwatch leads here because gap analysis is built into the workflow from finding to fixing. Content gap analysis with coverage scores is available from the Essential plan and shows prompts where competitors are answered and you are not. Prompt tracking adds search volumes, difficulty scores and citation rates across AI search, Google and Bing through Prompt Volumes. Query fan-outs are shown per model, and Prompt Explorer suggests prompts from Search Console, ranking keywords, People Also Ask or any page. Personas, including persona stacking, help you see gaps by buyer type.
Monks, an agency, has published how it uses the Answer Gap Report and Visibility Score for client content roadmaps, which shows how the output translates into a plan. Citation analytics reveal which of the competitors' pages the engines rely on, and Page Tracker lets you follow those pages. Topic Insights, within 360 Insights, show where your pages underdeliver for their topic.
To close gaps, the Action Board produces a prioritized weekly list, and Content Refresh suggests diff-style updates to existing pages. Content creation from a brief is available on demand, with a rich text editor and AI images, and publishing runs to WordPress, Webflow and Framer. On Business, the Content Agent plans, writes and publishes against gaps on a schedule, with a review inbox or a hands-off mode with a quality check. The Professional plan includes 5 AEO articles and a knowledge base of 100 items, and Business includes 10 articles and 150 items.
Plans: Explore is free, Essential $95, Professional $245 and Business $579 a month. Agency plans include content gap analysis but not AEO articles, the knowledge base or the Content Agent.
2. AthenaHQ
AthenaHQ combines GEO scoring with an Action Center that creates assignable tasks, and Starter includes a content optimization agent. It starts at $295 a month with 11 models, billed in credits. Starter is country-level only.
3. Scrunch AI
Scrunch AI starts at $250 a month and benchmarks competitors. Its catalog entry notes that it shows where you are not cited more than what to change, so budget editorial time for the interpretation.
4. Profound
Profound brings a Prompt Volumes dataset of real query demand, which helps prioritize prompts. Enterprise is custom priced, with an earlier estimate near $40,000 a year, and it is sold as marketing agents more than a gap tool.
5. HubSpot AEO
HubSpot AEO is $50 a month and gives prioritized recommendations such as creating a page, fixing a technical gap or reaching out to third-party sites. It covers three engines.
6. Semrush AI Toolkit
Semrush AI Toolkit maps keywords to prompts at $99 a month per domain, and its tracked prompts are generated approximations according to our catalog entry.
7. Content-side tools
Goodie AI grades pages for AI extractability and recommends edits from $295 a month. AirOps builds content workflows, with task-based billing. Both act on pages once you know the gap, and both need a separate source of measurement. Agentic automation tools such as Okara and Outrank ship content or fixes on a schedule and fit after the gap analysis rather than as a replacement for it.
Comparison
| Tool | Gap-analysis features per vendor listing | Entry price |
|---|---|---|
| Promptwatch | Content gap analysis, Prompt Volumes, fan-outs, Content Refresh, Content Agent on Business | Free tier; gap analysis from $95/mo |
| AthenaHQ | Action Center, content optimization agent | $295/mo |
| Scrunch AI | Competitor benchmarking | $250/mo |
| Profound | Prompt Volumes demand data | Enterprise custom |
| HubSpot AEO | Prioritized recommendations | $50/mo |
| Semrush AI Toolkit | Keyword-to-prompt mapping | $99/mo per domain |
| Goodie AI | Page grading, edit recommendations | $295/mo |
Who should pick which
If you want to find gaps and close them in one place, with demand data, competitor citations and publishing, choose Promptwatch. If you are a HubSpot team that wants cheap recommendations, try HubSpot AEO. If your main gap is on-page quality, a page grader like Goodie can help. If your team is already in Semrush, the keyword-to-prompt mapping is a convenient bridge.
A first gap analysis
Track 50 prompts for two weeks. List those where a competitor is named and you are not. For each, open the cited pages and ask what they answer that you do not. Then decide: refresh an existing page, create a new one, or earn a mention elsewhere. Publish the five highest-value fixes, and re-measure.
No tool can guarantee that closing a gap leads to a recommendation. Start by seeing your own gaps on the free Explore plan of Promptwatch.