Best AI SEO Agencies of 2026: Rank Across SERP, AIO & LLMs

Introduction

SEO has changed more in the last 18 months than in the previous decade, and if you’re a SaaS founder, B2B marketer, or SEO leader, that shift is impossible to ignore. 

Ranking on Google no longer guarantees visibility. Today, over 60% of searches end without a click, meaning users are getting answers directly from AI Overviews (AIOs), zero-click results, and LLM-generated summaries instead of visiting websites.

We’re no longer optimizing title tags or chasing keyword density. The new priority is building structured, credible content that large language models like ChatGPT, Gemini, and Perplexity can understand, reference, and cite. 

That’s Generative Engine Optimization (GEO), earning visibility even when buyers never click a link. And the change is happening fast: AI-driven search usage has grown more than 527% year over year, reshaping how people discover information.

Source

The problem? Most SEO agencies are still stuck in the past, mass-producing generic AI articles, ignoring entity-based SEO, and failing to measure AIO performance. 

That’s why more companies are turning to AI-first SEO partners who understand how search now works and know how to build visibility across every surface: SERPs, AIO, and LLM results.

Want to know how AI search is affecting your visibility?

In this guide, we’ll help you make the right call.

You’ll get:

• A ranked list of the 7 best AI SEO agencies in 2026
  
• The AI-first evaluation framework that separates the outdated from the future-ready
  
• How top players like Revv Growth are helping brands dominate where it matters most

Before we dive into the rankings, here’s the AI-first framework we used to assess today’s top AI SEO partners.

How We Ranked the Best AI SEO Agencies (2026 Evaluation Framework)

Let’s be honest, most “top agency” lists are fluff.

They rank based on vague reviews or generic SEO results that mean very little in today’s AI-driven search ecosystem. That’s why we built a new, AI-first scoring model specifically for 2026, one that evaluates how well agencies perform across AI Overviews, generative engines, and structured search environments.

We call it the 3-Layer AI SEO Scoring Model:

1. AIO Visibility (AI Overviews Performance)

This is the new Position Zero, and the most critical surface for organic discovery today.

We evaluated whether each agency could consistently secure client placements within Google’s AI Overviews, particularly on high-intent, mid-to-bottom-funnel queries. This included:

• Volume of AIO inclusions: Are clients being cited in AI Overviews for competitive keywords?
  
• Content format optimization: Does the agency use AI-preferred formats: definitions, structured lists, comparison tables?
  
• Snippet engineering: Are headers, metadata, and content framed to align with generative AI extraction logic?

Agencies that couldn’t demonstrate AIO inclusion were automatically scored lower, regardless of traditional SEO performance.

2. GEO Execution (Generative Engine Optimization)

Search now spans far beyond Google. Buyers are consulting ChatGPT, Perplexity, Gemini, and even tools like Claude for research, and they’re getting direct answers.

We assessed how well each agency builds content that is designed to be read, interpreted, and cited by generative engines:

• Entity-first structuring: Are content clusters organized around primary and secondary entities, not just keywords?
  
• Prompt-friendly formatting: Does content reflect the natural Q&A structures that LLMs prioritize when generating responses?
  
• Evidence of LLM visibility: Can the agency show screenshots or logs of clients being cited or linked in LLM tools?

If your agency isn’t optimizing for ChatGPT, Perplexity, and Gemini, you're leaving high-intent traffic, and future revenue on the table.

3. Entity & Schema Strength

In 2026, authority isn’t just built through backlinks. It’s built through entities, schema, and semantic relationships.

We evaluated whether the agency’s SEO strategy was rooted in brand-as-entity thinking, using:

• Advanced schema implementation: Beyond basics, are they deploying Product, FAQ, HowTo, and custom schemas?
  
• Knowledge graph optimization: Are they helping brands appear in Google’s knowledge panels and structured results?
  
• Internal semantic linking systems: Does their content strategy connect pages via concepts, not just navigation?

Strong entity SEO is what future-proofs rankings and increases the likelihood of being referenced in both search engines and AI models.

We also evaluated each agency on these secondary, but critical factors:

• Case Study Strength: Pipeline impact, SQLs, or AIO wins
  
• Content Quality Systems: Human-edited, AI-assisted workflows
  
• Reporting Maturity: Dashboards that track SERP + AIO + LLM citations
  
• Tech Stack: Custom tools, AI agents, and SOPs
  
• Industry Focus: SaaS, B2B, ecommerce, or enterprise.
  
• Pricing Transparency: Clear, up-front pricing and deliverables

This framework helps us go beyond “traffic” and focus on what matters in 2026: AI-era visibility, brand authority, and revenue impact. Now let’s move to the list.

The 7 Best AI SEO Agencies in 2026 (Ranked & Reviewed)

Using our AI-first framework, we identified 7 agencies that consistently outperform across SERP rankings, AI Overviews, and generative engine visibility. 

Each agency is evaluated across AIO impact, schema strength, LLM performance, and real-world results.

1. Revv Growth

Best for: SaaS brands and B2B companies seeking AIO dominance and LLM visibility

Overview

Revv Growth is an AI-first SEO agency built for SaaS and B2B brands looking to win across SERPs, AI Overviews, and generative engines. Their differentiator is deep operational capability, combining AI-powered systems with editorial precision to generate pipeline, not just traffic.

Core AI SEO Services

• AIO optimization with structured, snippet-engineered formats
  
• Advanced entity-based SEO and schema layering
  
• LLM visibility frameworks and prompt-compatible content
  
• AI-assisted content creation at scale with human QA layers
  
• Full-stack technical SEO using internal AI agents

AI-Specific Strengths

• Proven AIO dominance: 130+ blogs featured in Overviews & LLMs
  
• Multi-surface SEO reporting: SERP + AIO + LLM dashboards
  
• Proprietary editorial engine powered by RevvAI workflows
  
• GEO-ready structures that consistently appear in ChatGPT & Perplexity

Case Study: Everstage

Everstage, a global sales compensation platform, needed to scale high-quality content fast. Revv Growth built an AI-powered workflow using ChatGPT, Ahrefs, and Clearscope to publish long-form SEO blogs tailored for RevOps and SalesOps buyers. Within weeks:

• Content ranked on Google and AI Overviews

• Featured in ChatGPT and Perplexity citations

• Streamlined from draft to publish with AI + human editorial blend
  
• Visuals, metadata, and schema added for multi-surface SEO impact

Revv Growth isn’t just experimenting with AI SEO, they’ve operationalized it. Their track record of AIO rankings, LLM visibility, and high-frequency content execution makes them the most complete AI SEO partner in the market for 2026.

2. Passionfruit

Best for: Generative search (GEO) dominance & LLM-first content strategy

Overview

Passionfruit is a specialist AI SEO agency focused exclusively on Generative Engine Optimization, helping brands appear inside responses from platforms like ChatGPT, Gemini, Perplexity, and Claude. 

Instead of traditional keyword-led SEO, they build question-first content ecosystems engineered to be cited by LLMs. Their strength is in working with fast-scaling tech and fintech brands aiming to win zero-click visibility.

Core AI SEO Services

• GEO frameworks for generative engines
  
• Prompt-engineered content briefs and outlines
  
• AIO-friendly blog structuring with definition/list formatting
  
• Entity-based content clustering and schema implementation
  
• LLM citation testing and optimization workflows

Pros

• Leaders in generative search optimization
  
• Strong performance in long-tail and conversational queries
  
• Proprietary prompt libraries & GEO modeling tools
  
• Excellent for capturing ChatGPT & Perplexity answer placements

Cons

• Less emphasis on technical SEO and large-scale content ops
  
• Reporting dashboards not as advanced as enterprise-focused agencies
  
• Not ideal for companies needing high-volume production or deep funnel revenue metrics

3. TripleDart

Best for: Scalable programmatic SEO with AI-augmented workflows

Overview

TripleDart excels at programmatic SEO, creating high-volume, structured pages for long-tail queries. With their recent AI integrations, they now use machine learning to identify keyword gaps, auto-generate metadata, and optimize large-scale content systems. They’re especially effective for SaaS, B2B marketplaces, and PLG companies needing rapid topic expansion.

Core AI SEO Services

• Programmatic content generation for long-tail SEO
  
• Automated keyword clustering using AI research agents
  
• Dynamic internal linking and schema tagging at scale
  
• AI-assisted metadata and content optimization
  
• Landing page engines with LLM-friendly structures

Pros

• Outstanding for capturing long-tail and TOFU traffic
  
• Ideal for high-volume, templated SEO strategies
  
• Combines programmatic logic with AI structuring
  
• Fast execution cycles with high keyword coverage

Cons

• Limited editorial depth and human QA
  
• GEO and LLM citation capabilities are still developing
  
• Weaker on full-funnel strategy and bottom-of-funnel assets

4. Omnius

Best for: Full-funnel SEO strategy for SaaS and B2B brands

Overview

Omnius stands out for its holistic, full-funnel SEO programs, blending AI-enhanced content creation with CRO, demand gen, and sales alignment. 

Unlike other agencies focused narrowly on keywords or content volume, Omnius builds search ecosystems that convert, from TOFU discovery to SQL capture. They’re a go-to for SaaS brands looking to scale SEO with pipeline in mind.

Core AI SEO Services

• AI-assisted content planning tied to funnel stages
  
• Structured schema integration across all funnel content
  
• CRO-informed blog design and internal linking strategies
  
• Competitive AIO analysis and optimization
  
• Technical audits + implementation with AI insights

Pros

• Strong mix of SEO + CRO + RevOps alignment
  
• Understands buyer journeys and sales content needs
  
• Great at mapping content to pipeline metrics
  
• Solid AIO integration and technical SEO execution

Cons

• Slower production cycles compared to content-scale agencies
  
• Less focus on LLM citation engineering
  
• Custom programs may come at a premium

5. WebFX

Best for: Enterprise brands seeking end-to-end AI-powered SEO solutions

Overview

WebFX is one of the largest digital marketing agencies globally, known for delivering enterprise-grade SEO with layered AI capabilities. They offer a robust tech stack, in-house tools, and a full-service SEO operation that includes AIO optimization, technical SEO, and content automation. 

Their strength lies in servicing large-scale enterprises across industries with complex site architectures and high-volume demands.

Core AI SEO Services

• AI-driven keyword discovery and clustering
  
• AIO-optimized content structures and on-page formatting
  
• Deep technical SEO backed by proprietary AI tools
  
• Custom dashboards for SERP + AIO performance tracking
  
• Integration of content marketing, UX, and CRO insights

Pros

• Comprehensive service offering for enterprise complexity
  
• Scalable workflows supported by a large in-house team
  
• Access to proprietary AI tools and automation systems
  
• Strong technical foundation and reporting infrastructure

Cons

• Less agile than smaller, specialist agencies
  
• Content can feel generic without customization
  
• Weaker emphasis on LLM visibility and entity-first frameworks

6. Single Grain

Best for: Content-led SEO strategies with AI-assisted execution

Overview

Single Grain is a performance-driven SEO agency known for its content-first approach, now enhanced with AI-powered ideation and production workflows. Led by Eric Siu, the agency blends SEO, content marketing, and demand generation with modern AI tools. 

They focus on helping growth-stage companies build authority and organic traffic through thought leadership and educational content.

Core AI SEO Services

• AI-assisted content research, briefing, and drafting
  
• Topical authority building through pillar-cluster models
  
• AIO optimization layered into content production
  
• Integration of podcast/video repurposing into SEO content
  
• Content distribution tied to paid media and demand gen

Pros

• Great for content-led growth strategies
  
• Emphasizes thought leadership and brand positioning
  
• Strong editorial team with AI support for scale
  
• Works well for startups and mid-market brands wanting visibility

Cons

• Limited technical SEO and schema execution
  
• GEO and LLM visibility frameworks are still maturing
  
• Less suitable for enterprise or deep niche SEO

7. Directive

Best for: Product-led growth (PLG) SaaS brands focused on demand capture

Overview

Directive is a performance marketing agency that blends SEO with demand generation for PLG SaaS companies. While not a pure-play SEO agency, their content-led, bottom-of-funnel focus has made them a go-to partner for SaaS teams that want SEO tied directly to signups, trials, and revenue. 

Their newer AI integrations enhance content ideation and speed, but their emphasis remains on outcomes over rankings.

Core AI SEO Services

• Conversion-focused SEO content powered by AI tools
  
• BOFU content strategies aligned with PLG motions
  
• On-page and metadata optimization with schema basics
  
• Technical SEO audits and CRO-informed enhancements
  
• Content ideation and clustering using GPT-based tools

Pros

• Strong performance marketing mindset tied to PLG goals
  
• Effective at turning SEO traffic into trial signups
  
• Clear measurement and KPI frameworks
  
• Good for BOFU and product-driven content strategies

Cons

• Less focus on AIO and generative engine visibility
  
• Schema and entity SEO are not core competencies
  
• Limited investment in LLM optimization or structured data scaling

Now that you’ve seen how the top AI SEO agencies stack up, one thing is clear: not all SEO partners are ready for the new search reality. From AIO and LLM visibility to schema-first content architecture, 2026 demands more than keyword stuffing and traffic promises.

If you’re serious about ranking across SERPs, AI Overviews, and LLMs, you need a partner that’s optimized for all three. And Revv Growth is the only agency in this list built from the ground up for multi-surface SEO: SERP, AIO, and LLMs.

Book your AI SEO audit today and get a snapshot of your AIO rankings, LLM presence, and pipeline potential. 

How to Choose the Best AI SEO Agency (10-Point Checklist)

Choosing the right AI SEO partner in 2026 means going beyond vague promises and traffic dashboards. You need an agency that’s engineered for multi-surface visibility, not just outdated keyword tactics.

Here’s a proven 10-point checklist to help you evaluate whether an agency is truly built for AI-first SEO.

1. Proven AI Overview (AIO) Performance

Ask for real examples of clients featured in Google’s AI Overviews. No screenshots = red flag.

2. Demonstrated LLM Visibility

Do their clients appear in ChatGPT, Perplexity, or Gemini responses? Look for proof of citation and prompt testing.

3. Schema & Entity SEO Expertise

They should build entity graphs, not just write blogs. Schema depth and internal semantic linking are non-negotiable.

4. Proprietary AI Workflows

Generic tools won’t cut it. Do they have in-house AI agents, automation systems, or unique content ops?

5. Content Quality Control

AI-assisted is fine, but human editorial layers must be baked in. Ask about their QA process.

6. Technical SEO with AI Support

Do they use AI for audits, speed fixes, and schema deployment? True AI SEO is technical at its core.

7. Transparent Pricing

Clear retainers, defined scopes, and no bait-and-switch pricing signals operational maturity.

8. Multi-Surface SEO Reporting

Can they track performance across SERPs, AIO, and LLMs? Bonus if you get dashboards with live visibility insights.

9. Industry Specialization

Do they deeply understand your vertical, B2B SaaS, ecommerce, PLG, or enterprise? Or are they SEO generalists?

10. Case Studies With Real Pipeline Impact

Traffic is nice. Pipeline is better. Ask for SQL or revenue impact, not just rankings or clicks.

Smart Questions to Ask Before Signing

• “How do you track and report AIO performance?”
  
• “Show me an example of your schema implementation and entity graph.”
  
• “Have your clients been cited in ChatGPT or Perplexity? How do you measure it?”
  
• “What percentage of your content is AI-generated vs. human-edited?”

Red Flags to Watch Out For

• No technical SEO roadmap
  
• Rely entirely on AI tools with zero editorial oversight
  
• Obsess over backlinks and traffic, not conversions
  
• No mention of LLMs, schema, or AIO in their process

Pro tip: A great AI SEO agency won’t just help you rank. They’ll help you convert, because they understand how search, AI, and buyer intent intersect.

Also read → Is AI-generated content Good for SEO? A No-Nonsense Guide for 2025

What Working with a Top AI SEO Agency Looks Like (Process & Deliverables)

At Revv Growth, we don’t just offer SEO, we build AI-native visibility systems that turn search into pipeline.

Our engagement model is designed to reduce guesswork, accelerate execution, and deliver measurable results across SERPs, AI Overviews, and LLMs like ChatGPT and Perplexity.

Here’s what you can expect when you partner with us:

Phase 1: AI SEO Audit & Strategy (Weeks 1–4)

Our engagement begins with a deep dive audit to assess your brand's current AI search presence. This audit isn’t just about rankings; it’s about evaluating how your content and site structure are primed for AI-driven discovery.

What we deliver in this phase:

• AIO Visibility Analysis: We analyze where your brand appears (or doesn’t) in Google’s AI Overviews, the new Position Zero for high-intent queries.
  

• Entity & Schema Audit: Is your brand understood by AI? We ensure your site is semantically structured for visibility in AI systems, using schema and entity mapping.
  

• Competitive AI Search Mapping: We benchmark how your competitors perform in AI-driven results, identifying gaps and opportunities.
  

• Strategic Content Gap Analysis: Using data from your ICP and buyer intent, we pinpoint underused keywords and zero-click opportunities that will drive traffic.
  

• Actionable 90-Day Strategy: Based on the audit, we provide a customized roadmap for content, technical SEO, schema, and AI optimization.

This phase is about building the foundation for AI visibility, so your content can start showing up in the places buyers are looking for it.

Phase 2: Execution & Optimization (Months 1–3)

Now, we get to work with our AI-powered content engine and technical optimizations that will deliver real results across SERPs, AI Overviews, and LLMs. Our execution is highly data-driven and tightly aligned with your business goals.

What happens in this phase:

• AI-Assisted Content Production: We leverage RevvAI, our proprietary content engine, to generate optimized content. Our AI systems handle heavy lifting like research, drafting, and content ideation, while our expert editors fine-tune everything for brand consistency, quality, and accuracy.
  

• Schema & Entity SEO: We ensure every piece of content is tagged with the right schema, driving AI engines to understand your brand’s value and rank it higher in search results.
  
• On-Page & Technical SEO: From technical fixes to schema deployment, we tackle the backend of your site to improve crawl efficiency and site speed. We also optimize internal linking to support entity SEO.
  
• AIO-Optimized Content: We structure all content to align with AI’s love for list formats, definitions, and how-to guides, ensuring your content surfaces in AI Overviews and zero-click results.
  
• Internal Linking Strategy: We create a system of semantic links that connect related content across your site, boosting authority and enabling AI engines to understand your brand’s expertise.

By the end of this phase, your content will be optimized to rank in both traditional and AI-driven results, positioning your brand for maximum visibility.

Phase 3: Scaling, Reporting & CRO Alignment (Months 3–12)

SEO isn’t a sprint, it’s a marathon. In this phase, we scale your AI SEO efforts, expand visibility, and align everything with revenue-generating metrics.

What happens here:

• Multi-Surface Dashboards: We provide real-time visibility into your brand’s performance across SERP, AIO, and LLMs. Our dashboards allow you to track ranking shifts, visibility growth, and citation tracking in generative engines like ChatGPT.
  
• Continuous AIO Optimization: We continuously monitor your brand’s performance in Google’s AI Overviews to ensure long-term success. This includes regular prompt testing and updates to your content based on evolving AI search behaviors.
  
• Pipeline-Driven Reporting: Unlike traditional agencies that measure success by traffic alone, we tie everything to pipeline outcomes, measuring SQLs, demo requests, and content contributions to revenue.
  
• Content Acceleration: As we scale content, we keep track of what works, doubling down on the formats and topics that deliver the best ROI.
  
• CRO Alignment: We work with your team to ensure conversion isn’t an afterthought. Our content and technical optimizations are always aligned with your conversion rate optimization (CRO) strategy.

Core Deliverables You’ll Receive

• AIO Visibility Map: Where and how your brand appears in AI search results
  
• Entity Graph & Schema Strategy: Optimized for AI and semantic understanding
  
• Full-Funnel Content Calendar: Aligned with buyer intent and generative search opportunities
  
• Technical SEO Roadmap: Full action plan for website optimization and AI integrations
  
• Monthly Performance Reports: Insights into SERP, AIO, and LLM visibility, tied to revenue metrics

Our process is designed to position your brand for visibility across all AI-driven search surfaces, ensuring you’re not just seen, but cited by the platforms that matter. 

If you’re looking for more than just keyword rankings, but real AI-first search dominance, Revv Growth is built for your success.

Next Steps: Shortlist, Test & Scale with the Right AI SEO Partner

Choosing the right AI SEO agency is a critical step toward achieving long-term, sustainable visibility across AI-driven platforms. 

To ensure you're making the best decision, start by shortlisting 2–3 agencies based on their proven ability to optimize for AIO visibility, LLM citations, and pipeline impact. Use the 10-Point Evaluation Checklist to narrow down your options.

Once you’ve selected your candidates, run a 60–90 day pilot to evaluate their ability to deliver measurable results and optimize across multiple surfaces. Focus on real-world metrics like SQLs, revenue, and AI visibility rather than just rankings or traffic.

Finally, evaluate the results from your pilot and choose the partner that aligns with your long-term goals. Once you’ve found the right fit, scale the partnership to maximize AI-first visibility, content optimization, and pipeline growth.

At Revv Growth, we specialize in building AI-first SEO ecosystems that deliver measurable revenue impact. Our process is designed to scale visibility across SERPs, AIO, and LLMs while tying every effort to real business outcomes.

Ready to dominate AI-driven search? Talk to an AI SEO Specialist →

FAQs about the Best AI SEO Agencies