Otterly vs Ahrefs Brand Radar: Which AI Search Monitoring Tool Fits Your Marketing Stack in 2026?

Key takeaways

• Otterly for on-page GEO auditing with simple prompt tracking. Its GEO Audit crawls 1,000–10,000 URLs/month (by tier), scoring crawler permissions, dynamic content visibility, page speed, and structured data. Offers checks of 15–400 prompts you define across ChatGPT, Google AI Overviews, Perplexity, and Copilot.
• Ahrefs Brand Radar is the go-to AI visibility tool with context. Can track a prompt list or give access to a 405M+ prompt database grounded in real search, covering 6 AI platforms with Claude available for custom prompts.
• Otterly’s platform coverage for base plans includes only 4 platforms (ChatGPT, Google AI Overviews, Perplexity, Copilot), Google AI Mode and Gemini cost extra as add-ons.
• Brand Radar custom prompt tracking starts at $50/month (good for daily checking of 83 prompts on 1 platform), while the AI Visibility Index starts at $199/month, with a published methodology.

If you decided to put Otterly AI and Ahrefs Brand Radar one-to-one, you’re in the right place. I compared them on feature and database levels to see which one is better used as the primary AI monitoring tool.

Otterly gives you tracked prompt monitoring with citations, a GEO site audit, and suggested prompts with questionable intent volumes. To compare, Brand Radar gives you a massive prompt database based on their existing keyword database, and people also ask questions, queryable for any brand or market, custom prompt tracking across every supported platform, citation-gap analysis, and visibility across search demand, the web, Reddit, YouTube, and TikTok.

Otterly vs Ahrefs Brand Radar at a glance

Category	Otterly	Ahrefs Brand Radar
Core focus	AI search monitoring + GEO auditing	AI visibility tracking + discovery across AI, search, and UGC platforms
Prompt database	Not disclosed, you define the prompts	405M+ prompts from real Google search demand (110B-keyword index + People Also Ask)
AI platforms	4 in base plans (ChatGPT, Google AI Overviews, Perplexity, Copilot); AI Mode + Gemini as paid add-ons	ChatGPT, Google AI Overviews, AI Mode, Gemini, Perplexity, Copilot; Claude via custom prompts
AI visibility	Mentions, sentiment, cited links per tracked prompt; Brand Visibility Index composite score	Mentions, citations, search-volume-weighted impressions, Share of Voice for any brand, filterable to individual responses
Competitor analysis	Configured competitors within your tracked prompts; performance quadrants	Any brand — look it up, data and history are already there, no setup
Sentiment analysis	Yes, per mention	Not available
GEO / site auditing	GEO Audit: 25+ on-page AI-readiness factors (1,000–10,000 URLs/mo by tier)	Not available
Social & UGC tracking	Not available	Reddit, YouTube, and TikTok brand mentions
Search demand / web visibility	Not included	Branded search history since 2015; web mentions updated every few minutes
Historical data	Accumulates from setup	Included instantly with the index
Refresh cadence	Daily on tracked prompts	Keyword-based AI Overviews index every few days; prompt-based AI indexes monthly (90-day window); web every few minutes
Entry price	$29/month (15 prompts)	Custom prompts from $50/month; AI Visibility Index from $199/month
Best for	Small teams and agencies wanting affordable tactical GEO	SEO and marketing teams wanting discovery + tracking backed by real search data

AI visibility: mentions, citations, share of voice

Otterly AI visibility features

Otterly sends your defined prompts to its supported AI platforms daily. Check frequency is not customizable. Base plans cover ChatGPT, Google AI Overviews, Perplexity, and Copilot, while Google AI Mode and Gemini are available as paid add-ons. First results land within minutes of setup, however, without the historical data, the graphs start to populate from the day you add the prompts.

Otterly AI mentions

Otterly checks each tracked prompt daily against the AI platforms on your plan and records every response that names your brand. Mentions come with position context, how prominently you appear in the answer, and sentiment scoring, trended over time and against the competitors you’ve configured. Otterly only sees mentions inside the prompt set you defined, so anything your market asks that you didn’t think to track is essentially invisible.

Otterly AI citations

Alongside mentions, Otterly captures the URLs each AI answer cites when responding to your tracked prompts. This is generally useful for creating a list of topics you should create content around to get the AI platforms to cite your content instead of competitors’. This citation data also feeds directly into Otterly’s GEO audit loop, since it can then check whether your own pages are technically and structurally fit to take that citation’s place.

Otterly Share of Voice

Otterly’s Brand Visibility Index rolls mention frequency and your average position within AI answers into a composite score, then maps brands into performance quadrants: “Leaders,” “Niche,” and “Low performance” for a quick read of your position within your tracked prompt set. It’s more nuanced than raw mention counts, but the denominator is your portfolio: share of voice on the 15–400 prompts you chose, with no demand data to say how much those prompts actually matter.

Bonus: GEO Audit tools

Otterly’s GEO Audit tools allow you to crawl your pages (1,000–10,000 URLs/month depending on plan) and score them across five areas:

• crawler permissions
• dynamic content visibility
• page speed
• structured data
• AI Readiness (assessing natural language and whether content directly answers questions)

Otterly gives you recommendations across these reports, which you can implement on your end to score high. By scoring high across these audits, your content should be optimized to be cited by AI.

Ahrefs Brand Radar AI visibility features

Ahrefs Brand Radar offers you two paths: same as Otterly, you can monitor the prompts you choose, or use the AI Visibility Index, which has already collected the prompts, 405M+ of them, drawn from Ahrefs’ 110B-keyword database expanded via PAA (what users click next) and fanout queries to simulate real search. It runs them through the public interfaces of ChatGPT, Google AI Overviews, AI Mode, Gemini, Perplexity, and Copilot (Claude is included for custom prompts tracking only), and offers historical data, making it easier for you to analyze the market, rather than figuring out what to target.

Ahrefs Brand Radar AI mentions

AI mentions can be found in AI responses inside Brand Radar. Each mention ties back to the real search query that produced it. The “Not mentioned” filter surfaces the high-demand prompts where competitors appear, but your brand doesn’t, including prompts you’d never have thought to track, so you have a full picture of what content to focus on next.

Ahrefs Brand Radar AI citations

Ahrefs Brand Radar Citations show you the URLs linked inside AI answers. Cited pages drills to exact URLs, filterable to anyone’s domain or page type to find what’s shaping the AI model’s answers. It also works the other way around. For instance, the “Competitors” tab shows the cited competitor URLs along with the specific prompt queries. It also works the other way around, for instance, the “Yours” tab shows which of your pages earn citations, plus AI bot visits and AI-referred traffic.

Ahrefs Brand Radar Share of voice

Share of Voice measures the share of impressions compared to other tracked brands with a view segmented based on the AI platform to show you how you’re doing on each one.

Because every underlying prompt maps to real search volume, SoV pairs with Estimated Impressions to show not just your share of answers where you’re mentioned but how many people could potentially see your brand in the AI responses. If you want to dig deeper into how it’s calculated, Ahrefs shares the methodology publicly.

Ahrefs Brand Radar Custom Prompts

Custom prompts are the traditional way to track your AI visibility. The reason to choose this approach instead of the AI Visibility Index is that Brand Radar’s AI index prioritizes high-volume, common queries, which is useful for established brands or mapping out the top and middle of the market’s ceiling. But for funnel-specific queries or new brands, it’s best to use Custom prompts. Custom prompt tracking runs your own prompts on demand – daily, weekly, or monthly – across all supported platforms, including Claude. You get the same Overview and other reports just with a different data set.

Bonus: Ahrefs Brand Radar Topics

Ahrefs Brand Radar’s Topics report clusters the prompts where you and competitors appear into themes ranked by real search demand, each with its own competitor breakdown. It shifts the question from “which prompts mention us?” to “which themes are we losing?”, and because every topic carries volume, you chase the themes where the audience is largest.

Data methodology

Category	Otterly	Ahrefs Brand Radar
Prompt source	Undisclosed. User-defined prompts.	Real Google queries (110B-keyword DB + PAA), expanded via PAA + semantic fanout
Volume signal	Volumes, undisclosed sources.	Estimated monthly Google search volume of the parent keyword
Refresh cadence	Daily	User specified for custom prompts (daily, weekly, monthly); prompt-based AI indexes monthly (90-day reporting window)
Published methodology	Not publicly disclosed	Yes, full methodology posted

Otterly’s model cannot tell you whether the 15 (or 400) prompts you chose are the ones your market asks in reality. The keyword-to-prompt converter helps you phrase them conversationally, but no demand data validates the selection, and the collection methodology itself isn’t published. On the other end, Ahrefs documents their methodology publicly: what goes in, how it’s expanded, what the metrics do and don’t mean (Ahrefs is explicit that impressions are modeled visibility, not traffic).

Neither tool sees real user prompts, nobody does. Therefore, choosing the tool with the most accurate methodology matters here.

Pricing comparison

Otterly pricing

All Otterly plans give you daily tracking, unlimited brand reports, and team members. Lite plan gives you only 3 recommendations per week and lacks MCP, API, and Looker connector.

Plan	Price	What you get
Lite	$29/month	15 prompts, 4 AI platforms, 1,000 GEO URL audits/mo
Standard	$189/month	100 prompts, 5,000 GEO URL audits/mo
Premium	$489/month	400 prompts, 10,000 GEO URL audits/mo

Add-ons:

Add-on	Price	Notes
Extra 100 prompts	$99/month	Standard, Premium, or Custom plans only
Google AI Mode	$59/month	Selected countries only
Google Gemini	$59/month	Selected countries only
Claude	$109/month	Adds Claude response tracking

Ahrefs Brand Radar pricing

Every Ahrefs plan from Lite up includes a free quota of prompt checks (see above), with available add-on packages extending it:

Package	Price	Checks/month	Capacity
Basic	$50/month	+2,500	~83 prompts/day on 1 platform
Growth	$100/month	+7,000	~233 prompts/day on 1 platform
Scale	$250/month	+25,000	~833 prompts/day on 1 platform

One check = one prompt on one platform, so 2,500 checks buy ~83 prompts a day on a single platform, or can be split across multiple AI platforms and adjusted to weekly or monthly frequency.

AI Visibility Index is a separate add-on with instant, historical visibility for any brand or topic:

Option	Price	What you get
Single index	$199/month	One AI platform's full prompt index (e.g. ChatGPT), any entity, history included
All Indexes bundle	$699/month	Every platform index (ChatGPT, Google AI Overviews, AI Mode, Gemini, Perplexity, Copilot)

Which fits your marketing stack: Otterly or Ahrefs Brand Radar?

This one genuinely isn’t a David-vs-Goliath call, it’s a question of which layer of the stack you’re buying for.

Otterly can be good if your team knows which prompts matter, wants daily readings with sentiment, and needs a GEO audit to apply best practices.

Brand Radar is an intelligence layer. It allows you to analyze the market before choosing the prompts to track: what your market asks AI, where every competitor stands, which domains and threads shape the answers, and whether any of it is moving your branded search demand.

Your situation	Better fit
Small team or agency, defined prompt set, needs daily tracking + sentiment on a tight budget	Otterly
You need on-page GEO auditing with actionable fixes you have to manually implement	Otterly
You need to discover what your market asks AI before deciding what to track	Ahrefs Brand Radar
You want AI visibility connected to search demand, web mentions, and UGC with an auditable methodology	Ahrefs Brand Radar

My recommendation is to start with the tool that tells you where the battle is and then, if you need daily sentiment readings on the prompts, a tactical tracker earns its slot in the stack.