Top 37 SEO Agencies in AI Answers — August 2026

Three agencies lead the ranking at 9% naming frequency: First Page Sage, Thrive Internet Marketing Agency, and WebFX. First Page Sage shows extreme engine concentration, appearing in 27.5% of Perplexity responses but only 0% to 7.7% across all others. Thrive Internet Marketing Agency demonstrates more balanced distribution, ranging from 7.5% to 15.4%, while WebFX appears most consistently across engines from 2.5% to 22.5%, though none cite its own domain at scale. WebFX alone among the three earned self-domain citations at 5.8%, and appears at position 1 in response lists, though it received one negative mention.

The second tier consists of Victorious (8.3%), Clutch (7.7%), Ignite Visibility (5.1%), and Searchbloom (5.1%). Victorious shows uneven engine performance, appearing in 15% of Perplexity responses but 0% in Google AI Overview. Clutch stands apart with 17.7% self-domain citations and the widest distribution across engines, ranging 5% to 30% by source. Clutch also reached position 1 in response lists and appears as the most-cited source overall at 42 citations. Ignite Visibility and Searchbloom each hover around 5%, with Searchbloom showing 12.8% on Google AI Overview but 0% on ChatGPT and Grok.

Ahrefs, Focus Digital, Funnel Boost Media, Semrush, Directive, and the single-digit percentile brands (Screaming Frog through Straight North, all between 3.8% and 1.9%) form a long middle section with minimal consistency. Ahrefs at 3.8% and Semrush at 3.8% are tool providers occasionally named; both cite themselves at low rates (1.9% and 4.1% respectively), and Ahrefs received one negative mention. Directive at 3.2% shows heavy engine divergence—27.5% on Grok but 0% to 10% elsewhere—and appears at position 1 in some lists. Breaking B2B, NisonCo, OuterBox, Straight North, and SEO Brand all register under 2%, with OuterBox earning 4.4% self-domain citations and Straight North appearing at position 7 in response lists.

Single Grain appears at 0.6%, the lowest-named brand with any mentions at all. The remaining 29 brands—Accelerate Agency, Boxi, Brafton, Casjay, Conductor, Digital Silk, Distilled, Element Three, G2 Hill, HubShout, KlientBoost, Markitors, Metric Theory, Optmyzr, Portent, Revenue River, Searchmetrics, SeoClarity, Seoplus+, SERPhouse, SevenAtoms, Siteimprove, SparkPost, Station Two, ThinkSEM, Titan Growth, Wpromote, WSI, and Zazzle Media—received 0% naming across all engines. One exception: KlientBoost earned 0.6% self-domain citations despite 0% naming, and Portent received one negative mention from Grok despite 0% naming.

The six engines diverge sharply in breadth and focus. Claude and Perplexity each name 16 distinct brands, the broadest coverage, while Grok names only 11 and ChatGPT names 9, the narrowest. Perplexity concentrates heavily on First Page Sage (27.5%), nearly nine times the 3.1% average across other engines, showing strong outlier behavior. Claude spreads more evenly, with WebFX as its highest-named brand at 15%. Google Gemini and Google AI Overview each name 12 distinct brands, and ChatGPT shows the most conservative distribution, with Clutch as its leader at only 12.5%.

Citation behavior varies dramatically by engine. Grok returns zero citations across all answers, making it purely a recommender without source attribution. Perplexity cites brands' own domains on 1.7% of answers, the highest rate among the five citing engines. Google AI Overview averages 1.2% self-domain citations, Google Gemini 0.7%, Claude 0.4%, and ChatGPT 0.3%, with all engines citing third-party sources far more frequently than vendor domains. Of the top source domains, reddit.com (50 citations), clutch.co (42), and thriveagency.com (37) account for a majority, reflecting engines' reliance on peer review, directories, and vendor-owned content published elsewhere.

Engine preference shapes which brands appear visible. Clutch leads on Grok (30%), ChatGPT (12.5%), and Claude (5%), but appears far less on Perplexity (7.5%) and Google Gemini (5.6%), suggesting Grok and ChatGPT weight directory and review credibility higher. Perplexity's outsized preference for First Page Sage reflects its engine design, which may favor thought leadership or specific content patterns. Grok shows concentrated, dramatic swings: Clutch at 30%, Directive at 27.5%, WebFX at 22.5%, and Victorious at 17.5%, while all other engines spread recommendations more evenly, suggesting Grok's prompt interpretation or ranking algorithm operates on distinct principles from the others.