sirefs vs Ahrefs Brand Radar: your own prompts, or Ahrefs' index?

We make sirefs. To keep this fair, every fact about Ahrefs comes from Ahrefs' own pages, checked on 22 October 2026 and listed under Sources. Prices are as Ahrefs showed them in US dollars; it showed us euros on another visit, so the currency depends on where you are. Where Brand Radar is the better choice, we say so. For the wider market, read our guide to AI visibility tools.

Which should you choose?

• Ahrefs Brand Radar if you already pay for Ahrefs, if you want SEO data and AI visibility in one tool, or if you want to see how a market shows up in AI answers before you know which questions to track.
• sirefs if you want your own buyer questions tracked on every engine for one price, in your markets and languages, with numbers you can defend: the method on every answer, a sample size and a confidence interval on every rate, and alerts only when a change is real.
• Both if you research with Ahrefs' index and report on a fixed prompt set.

What is Ahrefs Brand Radar?

Brand Radar is Ahrefs' AI visibility tool, and it has two parts.^{1, 2}

The AI Visibility Index is pre-collected: more than 495 million prompts, modelled from the People Also Ask questions in Ahrefs' keyword database and asked in the same location as the keyword. You search it by brand or topic instead of writing prompts. The index is re-tested monthly and reported on a 90-day window.^{1, 2}

Custom prompts are the questions you write. You choose the platforms, one or more locations and how often each runs: daily, weekly or monthly.³

Sources: Brand Radar's page, the Ahrefs pricing page and help center.^{1, 2, 3, 4}

The unit. A check is one prompt on one platform in one location, for one update. A Claude update uses eight checks.²

Engines. The index covers Google AI Overviews, AI Mode, ChatGPT, Perplexity, Gemini and Copilot. Custom prompts add Claude. Grok was paused when we checked: Ahrefs says it is temporarily unable to gather new data.^{2, 3}

How it collects answers. Ahrefs says prompts are asked "in the web version of all AI platforms", without stored user data or prior context, and with no normalisation, personalisation, pre-prompting or filtering. Claude is the exception: it is collected through the API, with Claude Sonnet 4.6 and web search.² Ahrefs doesn't say whether the web versions are used logged in or out.

Subscription. Ahrefs' pages disagreed when we checked. The FAQ says Brand Radar is sold standalone from $50 a month, with no Ahrefs subscription required;⁵ the help center says the AI indexes need the Brand Radar AI add-on on a paid plan.²

Trial. We found no Brand Radar trial. Ahrefs offers a free AI visibility checker.¹

What does the same prompt list cost in each?

Take 25 buyer questions in one market. A month has about 4.3 weeks.

• Weekly on Ahrefs' six web platforms: 25 × 6 × 4.3 is about 650 checks. Adding Claude weekly (eight checks per update) adds about 860, so roughly 1,500 checks: inside the $50 package. Grok isn't available.
• Daily on the six web platforms: 25 × 6 × 30 is 4,500 checks: the $100 package. With Claude daily as well, about 10,500: the $250 package.
• On sirefs: Starter is €29 a month for those 25 prompts weekly on all eight engines, Grok and Claude included. For daily data, Pro is €99 for 60 prompts, daily on ChatGPT, Google AI Overviews, Google AI Mode, Bing AI Mode and Gemini, and weekly on Perplexity, Claude and Grok. A new workspace pays €9 for its first month on any monthly plan. Prices exclude VAT; see pricing.

The arithmetic depends on your list: many locations multiply Ahrefs' checks, and on sirefs the same question in a second market is a second prompt.

sirefs vs Ahrefs Brand Radar, side by side

Where is Brand Radar stronger?

• Research without a prompt list. The index lets you see how a brand or topic shows up across hundreds of millions of prompts before you choose what to track.¹
• One tool with your SEO data. If your team lives in Ahrefs, the AI numbers sit next to keywords, backlinks and traffic.
• Flexible frequency. You set daily, weekly or monthly per platform, and the check packages are cheap for weekly tracking.³
• Track record. Ahrefs is an established company; sirefs ran its first monitoring in October 2026.

Where is sirefs stronger?

• Every engine, one price. Grok and Claude are on every plan. Brand Radar has paused Grok and charges eight checks for each Claude update.
• The method on every number. Each answer is labelled ui, serp or api, and methods never share a trend line. See how we collect answers.
• Statistics you can defend. Every rate shows its sample size and a 95% Wilson interval, and an alert fires only when a two-proportion test says a change is real. See reading the numbers.
• Next steps from the answers. The pages each engine cites for each prompt, and what to publish or where to get mentioned.
• A GEO audit. 27 checks of whether AI crawlers can read your site, including your firewall and pages that need JavaScript.
• Your assistant connected. Pro and Agency include an MCP server and a REST API, so Claude, ChatGPT or Cursor can read your numbers.
• European. A Danish company with its servers and databases in the EU, and a data processing agreement on the Danish Data Protection Agency's template.

What doesn't sirefs do yet?

• No index of other people's prompts and no prompt volumes: you track the questions you choose.
• No SEO data. Keywords, backlinks and traffic stay in your SEO tool.
• No client logins for agencies. Agency gives a read-only report link for each client, under the agency's name, with no sign-in.

How do you test sirefs against Brand Radar?

1. Pick 20 to 30 custom prompts you already track in Brand Radar, the ones closest to revenue.
2. Add them to sirefs in the same markets, and compare only the engines both collect.
3. Compare like with like. Brand Radar's Claude and sirefs's Claude are both API answers, but from different models (Claude Sonnet 4.6 at Ahrefs, Claude Haiku 4.5 with web search at sirefs), and an API answer and an app answer aren't the same measurement.
4. Wait for enough answers before you compare rates, and read the intervals.

For a first look without signing up, the free check audits your site and lists the questions sirefs would track for it, and the live demo shows the dashboard on a real project.