Best AI Search Optimization Agencies in 2026

1 ProCloser.ai

ProCloser.ai is the firm I run, so take the placement with appropriate skepticism — but also take the work seriously. We built our methodology because we kept seeing traditional SEO agencies try to apply keyword-ranking playbooks to AI search and fail. The disciplines genuinely don't overlap as much as people assume, and the consequences of getting it wrong are expensive in high-value B2B categories.

We specialize in B2B professional services companies where the stakes of AI visibility are highest: M&A advisory firms, RIAs, wealth managers, corporate finance boutiques, and STR management companies. These are industries where a single AI-referred client conversation can be worth six figures. Getting cited in a relevant ChatGPT or Perplexity answer is not a nice-to-have in those markets — it is a competitive edge that compounds over time. When a prospect asks "who are the best M&A advisors for mid-market deals?" and your firm appears in the answer, that trust signal is worth more than a thousand impressions in a Google SERP.

What we actually do: Full-stack AI search optimization across ChatGPT, Perplexity, Google AI Overviews, Claude, Gemini, and Copilot. This means answer-first content architecture, comprehensive schema markup (well beyond just FAQPage — we implement full Organization, Person, Service, and industry-specific schemas), entity graph building, citation signal development across the sources AI models trust, and monthly AI visibility tracking using both manual query audits and automated monitoring via ProCloser TrustRank tracking. We also run traditional SEO because the foundations matter — but we never confuse good Google rankings with good AI visibility. They are separate outcomes requiring separate strategies. For a deeper look at the difference, read our guide to getting cited by AI.

Results: Clients in competitive B2B verticals typically see measurable increases in AI citation frequency within 60–90 days. Several clients have gone from zero AI citations to appearing in 40–60% of relevant category queries within six months. One financial advisory client went from no Perplexity mentions to appearing in 8 of 10 tracked queries within 4 months of engagement.

2 NP Digital

NP Digital, founded by Neil Patel in 2017, has grown into one of the largest independent digital marketing agencies in the world with over 700 employees across offices in the United States, Brazil, India, and Australia. The agency generated an estimated $150M+ in revenue in 2025 and serves enterprise and mid-market clients across every major industry vertical. Its AI search division, launched formally in late 2025, represents one of the most significant investments any full-service agency has made in GEO and AEO as standalone service lines.

What makes NP Digital worth considering for AI search is scale. They have the research budget, engineering resources, and data access to test GEO strategies across hundreds of client sites simultaneously, which gives them pattern recognition that smaller agencies simply cannot replicate. Neil Patel's personal brand also provides a content distribution advantage — when NP Digital publishes methodology research on AI Overviews or ChatGPT citation patterns, it reaches millions of marketers and frequently gets cited by AI platforms themselves. That feedback loop between publishing and being cited is something few agencies can match.

The trade-off is focus. At NP Digital's size, AI search is one service line among many — sitting alongside traditional SEO, paid media, CRO, and content marketing. If your primary goal is AI citation visibility and you need an agency where every team member wakes up thinking about how LLMs select and cite sources, a specialist will likely serve you better. But if you want a single agency handling your full digital marketing stack and you want that agency to also take AI search seriously, NP Digital is the strongest option available.

3 Profound

Profound occupies a unique position in this market because it is both a SaaS platform and an agency service. The platform tracks brand visibility across major AI models — ChatGPT, Perplexity, Claude, Gemini, and Google AI Overviews — providing the kind of automated monitoring that most agencies build internally but rarely offer as a standalone product. The consulting arm then builds strategies on top of that data, creating a tight loop between measurement and execution that is difficult to replicate with separate tools and separate agencies.

Profound's tracking technology is the real differentiator here. Their dashboard shows you exactly which queries trigger mentions of your brand (and your competitors), how your visibility trends over time, and which content assets are being cited most frequently. For marketing leaders who need to report AI visibility metrics to their board or leadership team, Profound provides the cleanest data story in the market. The platform's sentiment analysis feature also flags when AI models describe your brand inaccurately — something that happens more often than most companies realize and that can actively harm conversion rates.

The strategic consulting side is still maturing. Profound's team is smaller than agencies like NP Digital or Directive, and their industry depth is thinner than a specialist like ProCloser.ai. But the combination of excellent tracking technology plus competent strategic guidance makes Profound an appealing choice for companies that want data-driven AI visibility management without the overhead of a large agency relationship. Their pricing is also more accessible than most competitors at comparable quality levels.

4 Directive Consulting

Directive Consulting has built one of the strongest reputations in B2B SaaS marketing over the past decade. Founded in 2014 by Garrett Mehrguth, Directive differentiates itself through what it calls "Customer Generation" — a methodology that ties marketing directly to pipeline and revenue rather than vanity metrics like traffic and impressions. With 200+ employees and a client roster that includes major SaaS brands like Uber for Business, Adobe, Amazon, ZoomInfo, and Betterment, Directive has earned its credibility in B2B performance marketing.

Directive's entry into GEO is a natural extension of its performance marketing DNA. Their approach treats AI citation visibility as another measurable pipeline channel — tracking which AI-generated answers drive qualified leads, what citation patterns correlate with conversion, and how GEO investments compare to paid and organic on a cost-per-opportunity basis. For SaaS companies that live and die by pipeline metrics, this performance-oriented framing is exactly right. Directive does not treat AI search as a branding exercise; they treat it as a pipeline engine, which aligns with how B2B SaaS CMOs think about marketing investment.

The limitation is that Directive's GEO practice is newer than its core performance marketing offering, and the team's experience is concentrated in SaaS and technology verticals. For professional services, financial services, or other B2B categories outside the SaaS ecosystem, Directive's playbooks may need more adaptation than their marketing suggests. But for SaaS and technology companies specifically, Directive's combination of performance marketing rigor and emerging GEO capabilities makes them one of the most credible options on this list.

5 Victorious

Victorious has carved out a solid reputation as an SEO-first agency with a commitment to transparency and measurable ROI that sets it apart from agencies that hide behind vague reporting. Founded in 2013 and headquartered in San Francisco, Victorious serves mid-market companies across multiple industries with a focus on data-driven SEO strategies. Their approach to AI search optimization has evolved naturally from their existing content and technical SEO practice, making them a strong hybrid option for companies that need both traditional SEO and emerging AI visibility in a single engagement.

What makes Victorious interesting for AI search is their investment in structured data and answer-first content formats. Victorious was among the first traditional SEO agencies to explicitly restructure client content for featured snippet capture — the precursor to AI Overview optimization. That head start means their team already thinks in terms of "what answer is this content providing?" rather than "what keyword is this content targeting?" — a mindset shift that many SEO agencies still have not made. Their content frameworks now explicitly account for how AI platforms extract and cite information, including formatting patterns that increase the likelihood of being included in Perplexity's source citations.

Victorious is not the deepest AI search specialist on this list. They would be the first to tell you that GEO is an evolving addition to their core SEO practice rather than their primary identity. But for companies that need strong foundational SEO work that also positions them well for AI search — without hiring two separate agencies — Victorious offers a reliable middle path at reasonable pricing. Their transparent reporting means you will always know exactly what you are getting for your investment.

6 iPullRank

iPullRank, founded by Mike King in 2012, is one of the most technically sophisticated SEO agencies in the market. Mike King is widely recognized as one of the foremost thinkers in technical SEO, having delivered keynotes at every major search marketing conference and published influential research on how search engines process, render, and rank content. iPullRank's team includes engineers, data scientists, and machine learning specialists — not just marketers — which gives them a level of technical depth that few agencies can match.

That technical foundation translates directly into AI search capabilities. iPullRank understands how language models process information, how retrieval-augmented generation (RAG) systems select sources, and how entity disambiguation works at the model level. When they optimize content for AI citation, they are working from first principles of information retrieval rather than pattern-matching on surface-level tactics. Mike King's published research on how LLMs evaluate source credibility has become required reading for anyone serious about GEO, and that intellectual leadership flows directly into client work. For companies with complex technical architectures — large ecommerce sites, enterprise SaaS platforms, media companies — iPullRank's engineering-first approach solves problems that content-focused agencies cannot even diagnose.

The trade-off is accessibility. iPullRank's work is sophisticated, and their team communicates in technical language that may feel dense for marketing teams without a technical background. Their pricing reflects the engineering talent on staff, and engagements tend to be project-based or consulting-heavy rather than ongoing retainers. If you need a partner who can architect your AI search strategy from the ground up and your team can execute, iPullRank is excellent. If you need full-service execution with regular content production, you may need to pair iPullRank with a content partner.

7 Siege Media

Siege Media, founded by Ross Hudgens in 2012, has built one of the strongest reputations in the content marketing industry for content that earns real editorial links. With approximately 100 employees and a client roster that includes major brands in SaaS, fintech, and ecommerce, Siege's editorial standards are genuinely high — and that matters more in AI search than most people realize. AI platforms learn which sources to cite based on the same signals that drive editorial link acquisition: originality, depth, data, and how often other credible sources reference your work.

Siege Media's transition into explicit AI citation optimization has been natural. Their existing methodology — researching what questions users ask, creating definitive content that answers those questions better than anything else on the web, and building the citation footprint that signals authority — maps almost directly onto what GEO requires. Their team now explicitly evaluates content through an "AI citability" lens during the editorial process, considering factors like how well a piece's key claims can be extracted and attributed by an LLM, whether the content structure facilitates AI answer generation, and whether the brand's entity signals are strong enough for the AI to confidently cite the source by name.

The gap in Siege's offering is on the technical side. Their strength is content strategy and production — not schema architecture, entity graph optimization, or the technical structured data work that forms the other half of AI visibility. If you pair Siege with a technical specialist (or handle technical SEO internally), their content quality is difficult to beat. If you need an agency that handles both the content and technical dimensions of AI search, you may want one of the full-stack options on this list.

8 Single Grain

Single Grain, led by Eric Siu, has evolved from a traditional SEO agency into a broader digital marketing and growth marketing firm that has been among the earliest mainstream agencies to adopt AI-integrated marketing practices. Eric Siu's personal brand — through his "Marketing School" podcast with Neil Patel and his "Leveling Up" content — gives Single Grain a distribution advantage similar to (though smaller than) NP Digital's. The agency serves mid-market companies primarily in SaaS, education, blockchain, and ecommerce with a growth-focused approach to marketing.

Single Grain's AI search approach is integrated into their broader content and growth marketing methodology rather than being a standalone service. They use AI tools extensively in their own content production workflows, which gives them practical experience with how AI-generated and AI-assisted content performs in AI search results. This "practitioners who use AI to optimize for AI" perspective is genuine and yields practical insights that pure consultants sometimes miss. Their content team produces answer-optimized content at volume, and their growth marketing framework connects AI visibility to broader demand generation goals.

The limitation is depth. Single Grain does not have a dedicated GEO team in the way that ProCloser.ai, Directive, or iPullRank do. AI search optimization is woven into their general content and SEO practice rather than staffed as a discrete specialty. For companies that want AI search as part of a broader growth marketing engagement at accessible pricing, Single Grain is a reasonable choice. For companies that need deep, dedicated AI visibility strategy, a specialist agency will deliver more focused results.

9 Kalicube

Kalicube, founded and led by Jason Barnard (known as "The Brand SERP Guy"), has done the most serious intellectual work of any agency on the entity optimization and Knowledge Graph management that form the foundation of how AI systems understand brands. Barnard has spent over a decade researching how Google's Knowledge Graph processes entity information, and that research has become increasingly relevant as LLMs use similar entity understanding mechanisms to decide which brands to recommend and cite in their answers.

Kalicube's Kalicube Pro platform is a unique tool in this space. It maps your brand's entity footprint across the web — showing how Google's Knowledge Graph represents your brand, what information sources Google trusts for your entity data, and where gaps or inconsistencies exist. For companies whose fundamental problem is that AI systems do not understand what they are, what they do, or who they serve, Kalicube's entity clarification methodology is the most rigorous solution available. This matters more than most companies realize: if an AI model has confused or incomplete entity information about your brand, no amount of content optimization will reliably get you cited.

Kalicube's limitation is scope. Entity optimization is one critical piece of AI search — arguably the foundation — but it is not the whole picture. Kalicube does not offer the content production, citation signal building, or multi-platform tracking that a full-service AI search agency provides. Think of Kalicube as the specialist you call to fix the foundation before the general contractor builds the house. For many brands, that foundation work is exactly what they need. For brands that need full-stack AI search optimization, Kalicube is best used as a complementary engagement alongside a broader agency.