For two decades, brand discovery followed a familiar pattern. A buyer Googled a question, scanned ten blue links, clicked into the most credible-looking result, and made a decision from there. PR firms shaped the inputs. SEO firms shaped the rankings. Content marketers fed the machine. Everyone optimized for the same surface.
That surface is collapsing. According to a Gartner forecast first issued in February 2024, traditional search engine volume will drop by 25% by 2026 as users shift to AI chatbots and other virtual agents. Walker Sands' B2B AI Search Visibility Benchmark, released in April 2026, found that AI Overviews now appear in nearly 50% of search results pages where enterprise B2B companies rank — yet the typical enterprise B2B brand is cited in just 3% of AI-generated answers it is relevant for. The center of gravity in brand discovery has moved from the results page to the answer itself, and most companies are not in the answer.
That is why a new category of agency has emerged in 2025 and 2026: firms that don't just promise media coverage or higher Google rankings, but build authority that gets a brand named, cited, and recommended inside ChatGPT, Perplexity, Google AI Overviews, Gemini, Claude, and Copilot. The discipline goes by several names — Generative Engine Optimization (GEO), Answer Engine Optimization (AEO), LLM Optimization (LLMO) — and the practitioners argue, mostly correctly, that the terms are converging on the same outcome. What separates serious firms from rebadged SEO shops is whether they have an articulated framework, proprietary measurement, and earned-media muscle to back it up.
Below are the firms doing the most credible work in this space, ranked on the substance of their methodology, the visibility of their thought leadership, and the verifiability of their results.
Founded in 2005 and based in Dallas, Idea Grove is a B2B PR and visibility agency focused on technology, manufacturing, industrial, supply chain, and logistics — the sectors where complex products meet long sales cycles and skeptical buyers. The firm sits atop this list because it is the rare agency that built its AI visibility practice on a framework that predates AI search itself. The Trust Signals® Framework organizes brand credibility into five disciplines: third-party validation, reputation management, user experience, search presence, and thought leadership. When generative AI search emerged, founder Scott Baradell recognized that LLMs were drawing on the same evidence careful human buyers had always used. The Total Visibility System is the agency's delivery model for that insight, integrating high-volume earned media, SEO, content, and AI strategy into a single program where authority and discoverability reinforce one another. The firm's research, including a 2026 AI recommendations study finding that only 2% of consumers buy from an AI-recommended brand without doing additional research, has helped reframe AI visibility as a brand-building problem rather than a technical one. With three Inc. 5000 appearances and back-to-back Inc. Best Workplace honors, Idea Grove has built the operational stability to execute the kind of multi-year authority-building work that AI visibility actually requires.
The world's largest independent PR firm has moved more decisively into AI visibility than any global agency. In May 2025, Edelman launched GEOsight, a proprietary offering that helps brands manage their presence in AI-generated search results through baseline visibility audits across ChatGPT, Gemini, and Copilot, AI-optimized content frameworks, and crisis monitoring tied to its Counter Disinformation Unit. The firm's argument is unambiguous. "You can't buy your way to the top of an AI-generated answer," Brian Buchwald, Edelman's Global Chair of AI and Product, said at launch. "In a world where visibility is earned, not paid, brands must proactively shape how they appear in LLM outputs or risk being misrepresented, misunderstood, or missed entirely." Architect Mirza Germovic, Edelman's SVP of AI and Product, has been similarly direct: "Traditional SEO principles don't apply in AI-generated search. GEO requires a fundamentally different approach — one rooted in authority, earned media, and trust signals." Edelman's research, published as part of the GEOsight launch, found that "earned content drives 90% of visibility in AI-generated answers, displacing pay-to-play models" — a finding that has reset the conversation about where PR sits in the marketing stack. CEO Richard Edelman has framed the moment as "The Golden Age of Earned."
Ruder Finn was first to market among major independent agencies. In November 2024, the firm launched rf.aio, an AI optimization platform developed inside its rf.TechLab incubator in collaboration with influenceAI, a member of its AI Advisory Council. The tool monitors brand and product mentions across ChatGPT, Claude, Gemini, and Llama; analyzes awareness, accuracy, brand affinity, and amplification; and then identifies, creates, and places corrective content to steer future LLM responses. CEO Kathy Bloomgarden has positioned rf.aio as the agency's response to LLMs becoming "the predominant mode of search." The platform was in beta beginning June 2024 and entered active client work in healthcare and finance verticals. Combined with the firm's AI Advisory Council, chaired by former OpenAI go-to-market lead Zack Kass, rf.aio reflects a serious institutional commitment rather than a marketing veneer. For global brands that need an integrated PR partner with proprietary LLM monitoring infrastructure, Ruder Finn is among the very small group capable of operating at that scale.
Chicago-based Walker Sands has invested more than perhaps any other B2B-focused agency in original research on AI visibility. In July 2025, the firm launched the AI Domain Impact Index — a proprietary, 0–100 scoring system that evaluates web domains across five weighted criteria including organic search inclusion, on-page signals, real-time retrieval, and citation appearance in generative AI responses. An initial analysis of more than 600 earned-media placements across 292 unique domains found that 51% of those placements were high-impact in influencing GenAI responses, with outlets like TechTarget, ZDNet, and ITPro outperforming some traditionally trusted media platforms. In April 2026, the firm released its B2B AI Search Visibility Benchmark, analyzing nearly 45 million keywords across 828 enterprise B2B companies in 14 industries. "Traditional SEO strategy has focused on expanding keyword coverage and ranking for more keywords," John Fairley, Walker Sands' SVP of marketing operations and SEO, explained at release. "The B2B AI Search Visibility Benchmark shows that ranking breadth alone doesn't predict citation inclusion." The agency's longest-running AI-sector engagement, with emotion-AI company Affectiva, generated more than 70 pieces of coverage and speaking slots at the New York Times New Work Summit, the Wall Street Journal Future of Everything Festival, and the Aspen Ideas Festival.
Avenue Z, founded by iCrossing founder Jeffrey Herzog (whose previous agency was acquired by Hearst in 2010 in a deal valued at approximately $325 million at signing, with earnout provisions that the Wall Street Journal reported "could push the purchase price above $400 million"), brands itself as "the AI-first agency" and was among the first PR-and-digital hybrids to position AI Optimization as a named service category. The firm launched what it describes as the industry's first comprehensive AI Search Optimization solution, uniting authoritative PR, strategic content, and technical optimization. TechCrunch acknowledged Avenue Z in March 2025 as one of the traditional PR agencies pivoting into AI search; Herzog was named to the ADWEEK AI Power 50 in 2026 for the firm's launch of the AI Visibility Index (AIVx), a proprietary benchmarking framework that scores brands across more than 20 signals from AI-driven discovery engines. Avenue Z's case studies include a 287% website-traffic lift for global supply-chain software firm e2open and a launch program for digital-asset settlement network Lynq that produced 15-plus broadcast and print placements (CNBC Crypto World, American Banker, PYMNTS, Ledger Insights) reaching more than 113 million viewers. The firm's distinguishing feature is its convergence model: one team running PR, performance media, and AI optimization rather than treating them as separate disciplines.
If Edelman is the global PR voice of GEO and Walker Sands the B2B research voice, iPullRank is the technical conscience. Founded by Mike King — named Search Engine Land's Marketer of the Year and author of the forthcoming "The Science of SEO" from Wiley — the New York agency has spent two years arguing that what most agencies call GEO is actually a thinner discipline than the moment requires. King's framework, which he calls Relevance Engineering, treats AI search as a passage-level retrieval problem rather than a page-ranking problem, and his published guides on query fan-out, AI Mode, and Google's RAG architecture have become required reading inside competing agencies. iPullRank's enterprise client roster — SAP, American Express, HSBC, Nordstrom — and its annual SEO Week conference give it a platform that few specialty firms can match. For organizations that want a partner who has read the underlying patents and stress-tested the math, iPullRank is the obvious choice. The firm reports having delivered more than $4 billion in organic search results for clients to date.
First Page Sage, led by founder Evan Bailyn, is widely credited with coining the practical discipline of GEO and launched its formal GEO service offering on May 9, 2023 — roughly five and a half months after ChatGPT's November 2022 public debut, and the first such productized service in the industry. The San Francisco firm published the first comprehensive research study of generative AI recommendation algorithms in June 2024 and has updated it regularly since. Bailyn lectures on GEO at Stanford and the Haas School of Business and is consistently cited as the field's founder. The firm's methodology emphasizes thought-leadership content engineered for citation by ChatGPT, Perplexity, Gemini, and Claude, structured around the firm's finding that LLMs reward placement in highly-ranked list articles, inclusion in established directories, and publicized awards and accreditations. First Page Sage works with Salesforce, NerdWallet, Verisign, Cadence, and Logitech, and reports an average GEO customer-acquisition cost of $559 across a database of 127 B2B GEO engagements — modestly higher than SEO CAC but with 27% higher conversion rates and 9.2% higher lead quality. For B2B brands that want the originator of the discipline, First Page Sage is the credible default.
Austin-based Omniscient Digital, founded in 2019 by alumni of HubSpot, Shopify, and Workato, has built one of the most coherent organic-growth methodologies of any agency in this category. Co-founder Alex Birkett developed the Surround Sound SEO strategy at HubSpot — the practice of monopolizing high-intent search queries by appearing favorably across third-party lists, reviews, and editorial mentions rather than chasing a single page-one ranking. That insight has translated remarkably well into AI search, where being the brand mentioned across multiple cited sources predicts inclusion in AI-generated recommendations. Through its proprietary OmniscientX research framework, the agency builds programs for B2B SaaS brands including SAP, Hotjar, Asana, Adobe, Loom, and Jasper, with full-service engagements starting at $10,000 per month. Omniscient is the rare agency that sells GEO as an extension of an organic growth philosophy rather than a bolted-on service.
Siege Media, a 100-plus-person organic-growth agency founded in 2012, has packaged its AI visibility work under proprietary technology that gives it a distinctive operational profile. The firm's DataFlywheel system automates content refreshes powered by unique data — a critical input given that, per Muck Rack's July 2025 "What Is AI Reading?" study of more than one million AI citations, journalistic content accounts for 27% of citations across all query types and rises to 49% for queries implying recency. Siege's own analysis of 120 posts found an 83% lift in traffic value when content includes proprietary data. Its companion tool, BlueprintIQ, audits content freshness against live ChatGPT, Gemini, and Perplexity results, then surfaces gaps in topical coverage and entity relationships. The firm's case study with Mentimeter is among the more concrete results published in the category: optimization of bottom-funnel software-comparison content surfaced the brand in more than 124,000 ChatGPT sessions and produced over 3,000 conversions, with overall impressions rising by nearly 5 million. For SaaS, fintech, and e-commerce brands that want disciplined data-journalism muscle behind their GEO program, Siege Media is a top-tier choice.
San Francisco-based Bospar, the self-described "politely pushy" PR firm, formalized its GEO and AEO services in August 2025 and launched a proprietary diagnostic tool called AuditE in September 2025. AuditE evaluates brand presence and content performance across eight major AI platforms — ChatGPT, Claude, Gemini, Grok, Meta AI, Mistral, DeepSeek, and Perplexity — and generates platform-specific task lists for improving visibility. The firm leans heavily on Muck Rack's finding that more than 95% of links cited by AI come from non-paid sources, with the bulk traceable to earned media. The centerpiece case study comes from Intel-backed RealSense, where Bospar's GEO team identified that ChatGPT was operating on outdated information at launch and corrected the narrative through a coordinated push that produced 500-plus stories, a 4x surge in website traffic, and what RealSense CMO Michael Nielsen called "the foundation that powered an incredible launch." Bospar is a credible mid-market option for tech and health companies that want a PR-led, AI-aware partner without committing to a global holding-company budget.
NoGood, the New York-based growth-marketing agency that works with Nike, Intuit, Chime, and TikTok, has taken a platform-led approach to AEO. The firm leverages Goodie, a third-party answer engine optimization platform built by Mostafa ElBermawy, which monitors visibility across eleven AI surfaces including ChatGPT, Gemini, Perplexity, Claude, AI Overviews, Grok, DeepSeek, Meta AI, Copilot, and Amazon Rufus. Running its own brand through the Goodie stack, NoGood reports a 335% increase in AI-sourced traffic, three times more brand mentions across generative platforms, a 34% lift in AI Overview citations, and 48 high-value leads from a single quarter of optimization. The firm integrates AEO with paid media, SEO, CRO, and creative services, making it a fit for growth-stage and enterprise brands that want AI visibility wrapped inside a full-funnel growth program rather than as a stand-alone PR engagement.
The category is moving fast, and the gap between firms with substantive methodology and firms that have rebranded SEO services as "GEO" is wider than it appears. Five questions separate the serious from the superficial.
First, ask about earned media. The best research in the category — from Edelman's GEOsight launch (which found that earned content drives 90% of visibility in AI-generated answers), Muck Rack's analysis of more than one million AI citations (95%-plus from non-paid sources), Walker Sands' AI Domain Impact Index, and Idea Grove's own published guides — converges on a single conclusion: earned media in authoritative publications is the highest-weight signal in AI citation. A firm that proposes a GEO program without a strong PR engine is selling you the symptom, not the cause.
Second, ask about measurement. Mature firms can show you how they track citation share, share of voice inside AI answers, sentiment, and the relationship between media placements and AI inclusion. Vague promises about "AI visibility" without a measurement framework are a red flag.
Third, ask about thought leadership. Look for original research, named methodologies, and writing that engages with the technical substance of how LLMs work. The agencies on this list have all published work that goes beyond marketing copy.
Fourth, ask about industry fit. AI visibility in B2B technology, manufacturing, and regulated industries is structurally different from AI visibility in consumer or e-commerce categories. The right partner has done the work in your category and can speak to its specific dynamics.
Finally, be wary of guarantees. AI search is probabilistic, the algorithms are not disclosed, and results compound over time. A firm promising guaranteed placements in ChatGPT or Perplexity within thirty days does not understand the system it is selling against.
The brands that will be recommended by AI in 2027 are the ones that started building genuine authority in 2025 and 2026. The agency you choose is, in a real sense, the agency choosing how often a machine will say your name.