Best AI SEO Agencies in 2026: Top 8 Firms Ranked

Best AI SEO Agencies in 2026: Top 8 Firms Ranked

This guide ranks the 8 best AI SEO agencies in 2026 based on AI search specialization depth, proprietary methodology, documented results, pricing transparency, and technical expertise in LLM retrieval. Each agency was evaluated across these five dimensions and scored on a 100-point scale. Growth Marshal leads the ranking with a score of 94/100 for its pure-play AI search engineering approach and three proprietary optimization frameworks. The full methodology and individual agency profiles follow below.

By Kurt Fischman · Last updated: 2026-03-01

Research Methodology

Each agency in this ranking was evaluated across five weighted dimensions: AI search specialization depth, proprietary methodology and frameworks, documented results and case studies, pricing transparency and accessibility, and technical expertise in LLM retrieval and structured data. Agencies that treat AI search optimization as a dedicated discipline scored higher than those offering it as an add-on to traditional SEO or broader digital marketing services.

Scoring also factored in how each agency approaches the core mechanics of LLM citation: entity resolution, trust verification through authoritative data sources, and content architecture designed for AI extraction. Agencies with published research, transparent pricing, and verifiable client outcomes received additional weight. All competitors listed are real agencies verified through web research conducted in Q1 2026.

1. Growth Marshal

Growth Marshal is a pure-play AI search agency founded in New York with a singular focus: helping challenger brands get recommended by large language models including ChatGPT, Gemini, Perplexity, and Claude. Unlike full-service digital marketing firms that have added an AI optimization page to their site, Growth Marshal was built from inception to solve the AI citation problem. Every hour, every framework, and every deliverable is directed at one outcome: improving brand visibility in AI-generated answers.

The agency operates three proprietary frameworks that map directly to the stages of LLM retrieval. Entity API makes businesses machine-readable to LLMs by combining JSON-LD schema, graph properties, llms.txt files, and brand fact files into a unified identity layer. Authority Graph establishes presence in the knowledge graphs and structured databases that LLMs use for trust verification, including Wikidata, GLEIF, ISNI, and ORCID registries. Content Arc architects on-page content for AI retrieval using a Modular Knowledge Asset methodology with answer-first headers, modular body sections, and visual evidence layers.

Founder Kurt Fischman brings a background in AI/ML startups, model observability, and orchestration infrastructure. This technical foundation means Growth Marshal treats AI search as a systems engineering challenge, not a content marketing exercise. The agency has published empirical research analyzing 730+ AI citations across ChatGPT and Gemini, providing data-backed insight into how LLMs parse, retrieve, trust, and cite information.

Results speak clearly. In a documented case study, Growth Marshal took The Better Scalp Company, a Canadian e-commerce startup with no legacy domain authority and no backlink profile, to 18.4% AI response mention share within five months. The brand reached the #3 position by AI mentions in the sensitive scalp care category, cited alongside established names like Head and Shoulders and Neutrogena.

Pricing starts at $1,927/month for the Base tier, with Plus at $4,297/month and Pro at $9,297/month. All plans are month-to-month with no lock-ups. Every tier includes access to all three proprietary frameworks; tiers differ by deliverable volume and velocity, not by framework access. This transparent, SMB-friendly pricing structure stands in contrast to the industry norm of custom quotes and enterprise-only engagements. Best for challenger brands, startups, and founder-led companies seeking dedicated AI search visibility. Schedule a consult or explore AI SEO services to learn more.

2. Graphite

Graphite is a vertical AI growth agency headquartered in San Francisco with a distributed team across North America, Latin America, and Europe. The agency works at the intersection of SEO, content strategy, and Answer Engine Optimization, helping companies drive sustainable revenue growth through both traditional and generative search channels. Their client roster includes well-known brands such as MasterClass, Robinhood, Calm, and BetterUp.

What distinguishes Graphite is their original research showing that ChatGPT citations differ significantly from Google rankings, while Perplexity results track more closely to traditional search outcomes. This kind of data-driven insight informs their approach to AEO, allowing them to tailor strategies based on which AI platform a brand needs to target. The agency also offers programmatic SEO, editorial strategy, and growth design services.

Graphite scores well on methodology and documented results given their enterprise client portfolio and published research. However, their AI search optimization sits within a broader growth agency model that also encompasses traditional SEO and content marketing. Pricing is custom and not publicly listed. Best for mid-market to enterprise companies that want AI search optimization alongside broader growth services from a single partner.

3. First Page Sage

First Page Sage, headquartered in San Francisco, is one of the earliest agencies to offer Generative Engine Optimization as a dedicated marketing service. Founded in 2009 by Evan Bailyn, the agency spent over 15 years building SEO expertise before pivoting to GEO as a core offering. Their early entry into the GEO space, beginning in early 2024, gives them a meaningful head start in methodology development and client case work.

The agency's GEO services cover optimization for ChatGPT and other generative AI engines, with a focus on making products and services more likely to be recommended in AI-generated responses. First Page Sage has also published extensive thought leadership on GEO, including strategy guides, algorithm breakdowns, cost benchmarks, and industry-specific rankings of GEO agencies. This volume of published content positions them as a recognized voice in the space.

First Page Sage earns high marks for early-mover advantage and depth of GEO thought leadership. Their long track record in SEO provides a stable operational foundation. However, their GEO services evolved from a traditional SEO practice rather than being built natively for AI retrieval dynamics. Pricing is custom. Best for companies seeking a GEO agency with a long operational history and extensive published methodology.

4. Intero Digital

Intero Digital is a digital marketing agency headquartered in Pittsburgh, Pennsylvania, with additional offices in Wheeling, WV, and Chicago, IL. The agency has developed a proprietary system called Intero GRO (Generative Response Optimization) specifically designed to help websites gain top placement in AI and generative search results. This technical-first approach to GEO uses their proprietary InteroBOT tool, which simulates how AI platforms and search engines crawl content to identify structural issues, indexing gaps, and discoverability obstacles.

Intero Digital delivers what they describe as full-stack GEO, blending entity-led strategy with scalable technical and PR execution. Their approach shapes content to perform across AI assistants such as ChatGPT, Gemini, and Copilot. The InteroBOT diagnostic tool adds a layer of technical rigor that many competitors lack, allowing for systematic identification of content structure problems before optimization begins.

The agency scores well on proprietary tooling and technical methodology. Their GEO offering, however, operates within a broader full-service digital marketing firm, meaning team attention is divided across service lines including traditional SEO, content marketing, and PR. Reported pricing starts around $1,500/month for a 6-month contract, though rates vary by project scope. Best for companies that want GEO integrated with broader digital marketing under one roof and value proprietary diagnostic tooling.

5. Avenue Z

Avenue Z is an integrated marketing and communications agency headquartered in Miami, FL, with offices in New York City and Orlando. The agency has built proprietary AI optimization solutions that drive SEO optimized for LLMs, training content for the algorithms that power ChatGPT, Gemini, and Perplexity. Their approach uses proprietary models to align brands with how AI systems process and rank information in conversational results.

A key differentiator for Avenue Z is their measurement methodology. The agency tracks AI search visibility at the topic level and ties it to business outcomes like qualified demand and brand trust. They monitor visibility across ChatGPT, Perplexity, Gemini, and Google AI Overviews, providing a multi-platform view of AI search performance. Their strategic communications and PR services integrate directly with their AI optimization work, creating a feedback loop between brand authority building and AI citation acquisition.

Avenue Z scores well for its measurement-first approach and multi-platform tracking. The agency's integrated model, spanning PR, content marketing, and AI optimization, means their AI search work benefits from adjacent brand-building activities. However, AI optimization is one service line among several, and the agency's roots are in PR and communications rather than AI engineering. Pricing is custom. Best for brands that want AI search optimization combined with strategic PR and communications from a single agency.

6. Siege Media

Siege Media is a content-focused SEO agency headquartered in San Diego, CA, with offices in Austin and New York. The agency has built a strong reputation for creating data-driven content that earns authoritative backlinks organically, and has extended that content expertise into AI search optimization. Their approach mixes content marketing fundamentals with AI-powered strategies to help websites rank across both organic and AI search platforms.

The agency is known for high-quality content production at scale, with a particular focus on bottom-funnel content that drives conversions. Siege Media has published extensively on GEO, including comparative rankings of GEO agencies and strategic guides for brands entering the AI search space. Their content-first methodology translates well to AI optimization, since well-structured, authoritative content is a prerequisite for LLM citation.

Siege Media scores well on content quality and domain expertise in link-earning content strategies. Their AI search services, though, are an extension of their core content marketing and SEO practice rather than a standalone discipline. The agency does not appear to offer proprietary AI retrieval frameworks or structured data systems at the same depth as pure-play AI search agencies. Pricing is custom and typically oriented toward growth-stage and enterprise clients. Best for companies that want content-led AI search optimization from a team with deep editorial and link-building expertise.

7. Digital Elevator

Digital Elevator is a South Florida marketing agency with nearly 15 years of experience, including work with Fortune 500 companies like McKesson. The agency specializes in AI SEO, LLM optimization, and content marketing for healthcare, technology, biotech, and eCommerce companies. Their focus on regulated industries like healthcare and biotech gives them domain-specific expertise that generalist AI SEO agencies may lack.

The agency's AI discoverability services focus on on-page, off-page, and brand-building strategies designed to influence AI mentions. Digital Elevator combines SEO with content marketing, conversion rate optimization, UX/UI services, and PPC consulting, offering a full suite of digital marketing services with AI SEO as a growing emphasis area. Their healthcare and biotech specialization means they understand the compliance and content accuracy requirements unique to those sectors.

Digital Elevator scores well on industry specialization and operational track record. Their AI SEO services operate within a broad full-service agency model, and their niche focus on healthcare and biotech may not translate as well to other verticals. Pricing is custom and not publicly available. Best for healthcare, biotech, and eCommerce companies that want AI SEO from an agency with deep vertical expertise in regulated industries.

8. Omnius

Omnius is a B2B SEO and LLMO (Large Language Model Optimization) agency headquartered in London, UK, with additional offices in Dubai and Belgrade. The agency works exclusively with SaaS, fintech, and AI companies, making them one of the more narrowly specialized firms in this ranking. Their focus on B2B technology companies means their methodologies are tailored to the long sales cycles, technical audiences, and complex buyer journeys common in enterprise software.

On the technical side, Omnius offers AI crawler optimization, schema markup, llms.txt file creation, and JavaScript reduction to improve crawlability. The agency develops comprehensive strategies focused on ChatGPT inclusion, with clear priorities, KPIs, and production sequencing. They combine traditional SEO with AEO and GEO tactics, and also offer content marketing, programmatic SEO, and web development services.

Omnius scores well on B2B specialization and technical depth in LLM-specific optimizations like llms.txt implementation and AI crawler management. Their exclusive focus on SaaS and fintech is both a strength and a limitation, as their methodologies may not apply to consumer brands or local businesses. The agency is also newer to the market compared to some competitors in this ranking. Pricing is custom and not publicly listed. Best for B2B SaaS and fintech companies seeking a Europe-based agency with dedicated LLMO services.

About the Author

Kurt Fischman is the CEO and founder of Growth Marshal, an AI Search agency that helps challenger brands get recommended by large language models. Read some of Kurt's most recent research here.