Ahrefs Brand Radar vs Similarweb AI Search Intelligence

Both products solve the same underlying problem: showing you how often your brand appears in AI-generated answers, and against which competitors. They were built for very different buyers, though, and the contrast between them turns on where the AI data lives in your existing stack rather than on raw feature counts.

Ahrefs Brand Radar is an add-on that activates inside an Ahrefs account. It does not exist as a standalone product: you must already pay for Ahrefs Lite (€119/month) or higher before any of its AI tracking turns on. On top of that base, Brand Radar runs prompts through Google AI Overviews and AI Mode (treated as a single surface), ChatGPT, Perplexity, Gemini and Microsoft Copilot, and prices each surface at €179/month, or all five bundled for €654/month, with 2,500 custom-prompt checks included. A YouTube, TikTok and Reddit mention-tracking module is bundled free while in beta. Because the data sits inside Ahrefs, every mention view is cross-referenced against Ahrefs' existing backlink and keyword index. Most of that data refreshes on a roughly monthly cadence, which is slower than several dedicated AI-visibility trackers in this index.

Similarweb AI Search Intelligence is sold as a standalone module from publicly traded Similarweb (NYSE: SMWB), a vendor with $282.6M in FY2025 revenue and 6,128 customers reported in its 20-F. It tracks four engines (ChatGPT, Perplexity, Gemini and Google AI Mode) and ships five sub-modules at every paid tier: AI Brand Visibility, Prompt Analysis, Citation Analysis, Sentiment Analysis and AI Traffic. The entry tier is $99/month billed annually ($129 monthly), for 150 tracked prompts, one user and three months of historical data; the mid tier adds Similarweb's SEO and competitive-intelligence modules at $333/month; the top tier layers paid-media intelligence for $542/month. Sentiment Analysis and AI Traffic are the differentiators: AI Traffic tells you which competitor landing pages are actually capturing AI-referred visits, not just which brands are being named.

Engine coverage is the loudest practical difference. Both leave Claude, Grok and DeepSeek off the list. Ahrefs covers Microsoft Copilot where Similarweb does not; Similarweb treats Google AI Mode as its own surface where Ahrefs bundles it with AI Overviews. Neither is broader. They overlap on three engines and diverge on the fourth and fifth. Total monthly cost lands in a similar band once you load both with real coverage: a fully-loaded five-surface Ahrefs setup runs about €773/month once the €119 base subscription is added to the €654 bundle; the mid-tier Similarweb stack lands at $333/month for SEO plus competitive intel bundled with the AI module.