PromptSignal vs Ahrefs Brand Radar
In short. Ahrefs Brand Radar adds AI visibility to an established SEO suite: an index of more than 500 million search-backed prompts you can search for any brand with no setup, plus custom prompts tracked as often as daily. PromptSignal is a dedicated AI visibility platform built around your own prompts, with a free trial, white-label on your own domain and private cloud or on-premise deployment, delivered with our engineers. Both cover the same seven engines and capture answers from public interfaces, with Claude through its API.
Side by side
| Topic | PromptSignal | Ahrefs Brand Radar |
|---|---|---|
| AI engines tracked | ChatGPT, Google AI Overviews, Google AI Mode, Gemini, Perplexity, Microsoft Copilot and Claude | ChatGPT, Google AI Overviews, Google AI Mode, Gemini, Perplexity and Microsoft Copilot; Claude for custom prompts only, where each Claude check uses 8 checks |
| How answers are captured | Answers captured from the same interfaces your buyers use; Claude through its API with web search | Free public web interfaces with each engine's default model; Claude through its API with web search |
| Countries and languages | 72 countries and 32 languages | Index prompts run where their source keyword came from, mirroring its keyword database and strongest in English; custom prompts take one or more locations; a country count is not published |
| How often prompts run | Every 48 hours by default | Custom prompts daily, weekly or monthly per platform; the index retests chatbot prompts monthly on a 90-day window and refreshes AI Overviews and AI Mode more often |
| Metrics | Visibility, mentions, average rank, first mention, share of voice, sentiment from 0 to 100 and gap to the leader | Mentions, citations, AI share of voice, sentiment, and Estimated Impressions weighted by Google search volume, which Ahrefs describes as directional |
| Citations and sources | The domains and pages engines cite, and citation gaps: pages that name your competitors but not you | The pages and domains cited in AI answers, plus YouTube, TikTok and Reddit indexes in beta |
| Competitor benchmarking | Share of voice, exclusivity, gap to the leader and co-mention threat for every competitor | AI share of voice against competitors for any brand, product or domain, with no cap on the brands you analyze |
| From insight to fix | A technical audit of your site, with every fix as a ticket on a board, and content briefs for the prompts you are missing, turned into articles in the editor | Shows cited pages and visibility gaps; Site Audit, AI Content Helper and Bot Analytics for AI crawlers sit elsewhere in the Ahrefs suite |
| Self-serve start | A 7-day free trial and self-serve setup, then from $99 per month with 50 prompts per brand (a card is required) | Custom prompt checks come with every paid plan from Lite, and Brand Radar is also sold on its own; no free trial is listed |
| Agencies and white-label | Every brand and client in one account, each organization with its own billing; white-label with your logo, your colors and your own domain, set up with our team | Portfolios, Report Builder widgets, a Looker Studio connector and an agency directory listing on the Advanced plan; white-label is not published |
| Deployment | Our cloud, or private cloud or on-premise deployment, delivered with our engineers | A cloud service; private cloud and on-premise options are not published |
| Custom work | Custom engines, markets, prompt sets and integrations, built by our engineers | Enterprise adds uncapped API access, custom API endpoints, personalized limits and no training on your data |
| Compliance | SOC 2 and GDPR | Certified information security management, per its enterprise page; its privacy policy lists the GDPR among applicable laws |
| Measurement method | Published: visibility is the share of runs that name you, every answer kept in full | Published: prompts seeded from its keyword database and People Also Ask, run in public interfaces, with metrics it calls modeled and directional |
Choose Ahrefs Brand Radar if
- You want to research any brand, product or category instantly, with no setup, across more than 500 million prompts and history back to 2025.
- You want AI visibility tied to search demand, with every index prompt mapped to keywords and Google search volume.
- You already pay for Ahrefs: every paid plan from Lite includes custom prompt checks, so you can start without a separate purchase.
- You want off-site source data from YouTube, TikTok and Reddit, plus AI crawler and AI traffic analytics.
- You want to choose the cadence for each engine, up to daily, and pay by checks.
Choose PromptSignal if
- You want a free trial and self-serve setup in minutes, starting from 20 suggested prompts written for your company, market and language.
- Your markets go beyond English: prompts can run in 72 countries and 32 languages, grouped with segments and tags.
- You want first mention and gap to the leader, plus exclusivity and co-mention threat for every competitor, with every answer kept in full.
- You need white-label with your logo, your colors and your own domain, set up with our team.
- You need private cloud or on-premise deployment, delivered with our engineers.
Ahrefs sells Brand Radar two ways. Custom prompt tracking comes with every paid Ahrefs plan from Lite, with larger check packages on top. The AI Visibility Index, a prebuilt index of more than 500 million search-backed prompts, is a separate purchase. Ahrefs is an established SEO suite that has added AI visibility; PromptSignal is a dedicated AI visibility platform. Both cover the same seven engines, and both capture answers from public interfaces, with Claude measured through its API with web search.
Where Ahrefs Brand Radar is strong
The index is the standout. You can search any brand, product or category with no setup, see history back to 2025, and analyze as many brands and domains as you like. Index prompts are seeded from Ahrefs' keyword database and People Also Ask, so AI visibility maps back to real search demand, and indexes for YouTube, TikTok and Reddit show the off-site sources that shape answers.
Custom prompts are flexible: you choose daily, weekly or monthly runs for each platform and pay by checks. Ahrefs publishes its methodology and is open about its limits: index metrics are modeled and directional, and coverage is strongest in English. Every plan from Lite includes API and MCP access, and Bot Analytics and Web Analytics show AI crawler visits and the traffic AI search sends you.
Where PromptSignal differs
Built around your prompts. PromptSignal starts from 20 suggested prompts written for your company, market and language, runs them every 48 hours by default, and reports visibility as the share of runs that name you, with every answer kept in full. It adds first mention and gap to the leader, plus exclusivity and co-mention threat for every competitor. Gaps become technical fixes, filed as tickets on a board, and content briefs that turn into articles in the editor. Our methodology is published too.
Markets. Ahrefs does not publish a country count for Brand Radar. PromptSignal prompts can run in 72 countries and 32 languages, grouped with segments and tags.
Getting started and scale. Ahrefs lists no free trial. PromptSignal starts with a free trial and self-serve setup. For agencies and enterprises it adds white-label with your logo, your colors and your own domain, set up with our team; private cloud or on-premise deployment, delivered with our engineers; and custom engines, markets, prompt sets and integrations.
How to choose
If your team already uses Ahrefs and wants to research AI visibility across a market, tied to search demand, Brand Radar is the natural extension. If you need a dedicated program on your own buyer prompts across markets and languages, with white-label for clients or deployment in your own cloud, PromptSignal fits. The two can run side by side: Brand Radar for market research, PromptSignal for tracking and fixing your own prompts.
Questions
Is Brand Radar included in an Ahrefs subscription?
Partly. Every paid Ahrefs plan from Lite includes a monthly allowance of custom prompt checks in Brand Radar. The AI Visibility Index is a separate purchase, for one platform or all of them, and extra checks are sold in packages.
How fresh is Ahrefs Brand Radar data?
Custom prompts run daily, weekly or monthly, set per platform. In the prebuilt index, Ahrefs retests ChatGPT, Perplexity, Gemini and Copilot prompts monthly on a 90-day reporting window, and refreshes AI Overviews and AI Mode more often. PromptSignal runs prompts every 48 hours by default.
Does Ahrefs Brand Radar track Claude?
Yes, for custom prompts only. Ahrefs tracks Claude through its API with web search, and each Claude check uses 8 checks from your allowance. PromptSignal also measures Claude through its API with web search.
How is PromptSignal different from Ahrefs Brand Radar?
Brand Radar is part of an SEO suite and maps AI visibility across a prebuilt index tied to search demand, which suits research on any brand. PromptSignal is a dedicated AI visibility platform built around your own prompts, with fixes as tickets on a board, briefs that become articles, white-label on your own domain, and private cloud or on-premise deployment.
Sources
- 1Ahrefs Brand Radar (opens in a new tab) ahrefs.com, accessed Nov 4, 2026
- 2Ahrefs plans and pricing (opens in a new tab) ahrefs.com, accessed Nov 4, 2026
- 3What is Brand Radar, and how to use it? (Ahrefs Help Center) (opens in a new tab) help.ahrefs.com, accessed Nov 4, 2026
- 4How to set up custom prompts to track brand visibility in AI assistants (Ahrefs Help Center) (opens in a new tab) help.ahrefs.com, accessed Nov 4, 2026
- 5Ahrefs Brand Radar methodology: how we collect and model AI visibility data (opens in a new tab) ahrefs.com, accessed Nov 4, 2026
- 6Ahrefs Enterprise (opens in a new tab) ahrefs.com, accessed Nov 4, 2026
- 7Ahrefs Report Builder (opens in a new tab) ahrefs.com, accessed Nov 4, 2026
- 8Ahrefs privacy policy (opens in a new tab) ahrefs.com, accessed Nov 4, 2026