Best GEO Agencies of 2025: Who Can Put Your Brand in ChatGPT, Perplexity & Google AI Overviews?

Search is still search—but the surface where it happens is shifting from clickable blue links to AI-generated answers. Large language models (LLMs) such as ChatGPT, Perplexity, and Gemini now respond to billions of prompts a month, and Google’s own AI Overviews are rewriting what “position #1” even means. 

If your brand isn’t showing up inside those machine-written summaries, you’re invisible when prospects ask an AI for advice. The discipline designed to fix that blind spot is Generative Engine Optimization (GEO), and the agencies below specialise in it.

Why Generative Engine Optimization Matters in 2025

Google users click a classic result only 8% of the time when an AI Overview appears—versus 15% when no summary is present. In addition, ChatGPT scaled from 400 million weekly users in February 2025 to ≈800 million by October 2025.

Those two statistics alone explain the urgency: AI answers soak up clicks, and the underlying tools now attract audiences once reserved for Google. 

Brands that optimise only for traditional SEO will increasingly watch their traffic leak to generative engines.

From SEO to GEO – The Key Shifts

1. Keyword research → Prompt research. Instead of chasing volume terms, marketers map the conversational prompts LLM users actually type.
2. Backlinks → Entity reinforcement. Links still matter, but so do consistent brand mentions across Wikipedia, Reddit, and credible listicles—the very citations LLMs scrape.
3. Readability for humans → Readability for machines. Clear headings, precise answers, and FAQ schema help models parse and quote your content.

Industry analysts now forecast that AI-search traffic will overtake organic clicks by 2028, and Pew’s data shows roughly 18% of Google searches already return an AI Overview. 

In other words, GEO is no longer experimental—it’s table stakes. For a deeper dive into the mechanics, check out BusinessABC’s feature on how AI is reshaping classic SEO.

Top GEO Agencies to Watch in 2025

1. Growth Marketing Pro (GMP)

Growth Marketing Pro—better known as GMP—is one of the first dedicated GEO agencies and its track record backs that up. 

The team activates every GEO lever—from high-intent AI-optimized on-site content to strategic placements on Wikipedia, high-authority listicles, and Reddit communities that shape LLM results

They pair that with their proprietary LLM-Readiness Checklist covering clarity, logical hierarchy, and factual verification—three signals ChatGPT and Claude rely on when selecting citations and answering search queries. 

Case in point: Fintech startup Cube credits GMP for becoming “one of the top-mentioned brands in our category” while generating measurable leads from ChatGPT screenshots. 

Beyond GEO, the San-Francisco-based shop runs paid search, social, and Reddit marketing, so clients can roll AI visibility into a broader growth program without juggling agencies. 

Transparent dashboards show positions in Google, ChatGPT, and beyond next to classic rankings—useful proof for skeptical boards. And just like with SEO, every LLM mention is tied back to leads, SQLs, and revenue.

In short, GMP offers a full-funnel road map for companies that want GEO, SEO, and revenue in one retainer.

2. Trailblaze Digital

Trailblaze Digital sits at the intersection of SaaS marketing and conversational AI. Its strategists reverse-engineer high-intent prompts—“best payroll software for remote teams,” for example—and then spin up FAQ-rich landing pages that answer those questions verbatim. 

A rapid-fire schema sprint follows, layering HowTo and FAQ markup so Google’s AI Overview can quote the page sentence-for-sentence. Off-page, Trailblaze cultivates relationships with industry newsletter authors who feed LLM training data, giving clients entity mentions that stick.

Reporting comes in the form of “Prompt Share of Voice” dashboards that log daily visibility across ChatGPT, Gemini, and Claude. Pricing is mid-tier—ideal for Series B SaaS firms that want a specialised GEO playbook without enterprise overhead.

3. SearchLLM

Born out of a data-science studio, SearchLLM treats generative search like a machine-learning problem. Engineers parse server logs to identify pages already scraped by bots such as Common Crawl, then optimise those URLs with entity-rich copy and citations. 

The agency also runs controlled experiments, tweaking micro-copy and measuring when ChatGPT starts naming the brand in its answers. Technical depth shows up in their use of extended-length sitemap indexes and multilingual hreflang for Gemini’s global corpus. 

Clients include academic publishers and B2B data providers—organisations with vast archives that need to be understood, not just crawled. 

Packages start with a one-time audit, but most customers upgrade to the “LLM Continuous Integration” tier, which pushes schema and content updates weekly. 

If your marketing and dev teams already speak Python, SearchLLM will feel like home.

4. Quantum SEO Labs

Quantum SEO Labs blends classic content creation with Retrieval-Augmented Generation (RAG) optimisation. Writers craft long-form explainers; analysts then run the text through proprietary RAG scripts to flag gaps against top AI answers, tightening paragraphs until a model like Claude can quote them wholesale. 

The shop’s multilingual bench makes it a favourite for EMEA brands eyeing non-English prompts. One German SaaS client saw its brand name appear in both the English and French versions of Google AI Overviews within eight weeks. 

Quantum also maintains a network of regional publishers for backlinks, ensuring entity authority scales across languages. 

Pricing is modular—choose content only, technical only, or full-stack GEO—but even the á-la-carte tiers include monthly “LLM Drift” reports that alert you when an answer changes. 

The result: fewer nasty surprises when a model refresh bumps you off the list.

5. BrightEdge AI Services

Enterprise marketers recognise BrightEdge for its SEO platform; BrightEdge AI Services extends that tech into GEO. Clients tap Data Cube to surface conversational queries, then push approved briefs straight to an in-house writing team versed in prompt alignment. 

A new LLM Visibility module tracks how often your domain is cited across ChatGPT, Perplexity, and Bard via API polling, turning anecdotal mentions into KPIs the C-suite can parse. Because BrightEdge already integrates with Adobe Experience Manager and Sitecore, structured-data deployment is one click. 

Fortune-500 users like the ability to A/B test schema variants across thousands of URLs without engineering bottlenecks. The agency arm layers on white-glove link acquisition, targeting high-Domain-Authority listicles and government resources to strengthen what BrightEdge calls “source gravity.” 

Expect enterprise pricing, but also enterprise-grade compliance and security sign-offs.

6. PressHERO

Where most GEO agencies dabble in PR, PressHERO is Digital PR—engineered for generative engines. The team’s core product: guaranteed placements in top-tier publications and curated listicles that LLMs routinely scrape. 

Because models weigh mainstream authority heavily, a single PressHERO article can tip the balance in AI Overviews within days. Beyond hero hits, the agency offers a monthly package that drip-feeds niche blogs and industry journals, reinforcing entity consistency across the web.

The result is a symbiotic loop: placements feed the presskit, the presskit feeds the placements, and AI engines pick up both. If you already have SEO dialled but need authoritative citations fast, PressHERO is the accelerant.

How to Pick the Right GEO Partner

1. Match services to maturity. Early-stage startups may need rapid link velocity (PressHERO), while scale-ups might benefit from full-stack programs (GMP).
2. Demand LLM metrics. Impressions are passé; ask for Prompt Share of Voice and AI Overview tracking.
3. Inspect schema chops. Agencies should treat FAQ, HowTo, and Product markup as non-negotiable.
4. Check tooling lock-in. BrightEdge is great if you’re on Adobe, but overkill if you publish in Webflow.
5. Budget realistically. Most retainers start where classic SEO left off; yet remember, ChatGPT alone sees ≈4.61 billion monthly visits. The upside can justify the spend.

Caveats & Counterpoints

Generative engines evolve constantly. A model refresh can shuffle brand citations overnight, and source attribution remains inconsistent. Google, meanwhile, may dial AI Overviews up or down in response to publisher push-back. 

GEO is, therefore, a moving target: treat it as an ongoing program, not a one-off sprint.

Conclusion: Claim Your Slice of AI Visibility

The LLM era doesn’t kill SEO—it extends it. Brands that layer GEO onto their existing search strategy will own the conversation wherever customers ask smart questions, whether that’s a ChatGPT prompt or a shrinking list of organic links. 

Start by auditing your AI footprint, pick a partner that aligns with your goals, and feed the algorithms the authoritative answers they crave. Because in a world where machines write the summaries, only the most machine-ready brands get mentioned at all.