AI-driven search is no longer a future scenario—it’s already rewiring how brands find customers. Between January and May 2025 alone, AI-sourced web sessions across 19 analytics properties surged 527% year-over-year.
Even more striking, a Semrush study found the average AI search visitor converts 4.4 times better than a traditional organic visitor. Gartner expects traditional search volume to drop 25% by 2026—pushing marketing budgets toward chatbots and virtual agents.
This isn’t just a traffic shift; it’s a complete rethink of what makes a brand visible. Semrush’s data shows that a significant portion of top-of-funnel AI citations originate off-site. If you’re not on the lists the models scrape, you’re invisible. You need a specialist who can engineer your presence inside ChatGPT, Perplexity, and Google AI Overviews, not just repackage link building as “GEO.”
That’s exactly what this guide helps you find. We’ve evaluated the agencies that are delivering verifiable LLM visibility—measured by real case studies, transparent reporting, and genuine AI search wins.
[Before you commit to any partner, it’s worth brushing up on the fundamentals of how to choose a digital marketing agency so you know what questions to ask.]
Methodology: How We Evaluated the Best LLM Optimization Agencies
We scored every agency against five concrete criteria:
- Proven AI search visibility – Metric-backed case studies showing actual brand appearances across ChatGPT, Perplexity, and Google AI Overviews.
- Specialized GEO methodology – A clearly communicated approach that goes beyond generic SEO, covering citation engineering, multi-engine optimization.
- Client feedback & reviews – Verified scores and detailed testimonials that go beyond “great results.”
- Reporting transparency – The ability to track and report AI-specific visibility—not just keyword rankings.
- Thought leadership & focus – Original research, established frameworks, and a dedicated LLM-optimization practice, not a side hustle.
#1 Growth Marketing Pro (GMP)
Growth Marketing Pro, or GMP, brings a full growth stack to the table. Beyond LLM optimization, the team handles answer engine optimization (AEO), Reddit organic, programmatic SEO, content marketing, and paid ads—making it a one-stop growth partner for scaling B2B SaaS and ecommerce brands.
- Self-described early advantage: GMP was publicly positioning itself as a dedicated GEO agency before most competitors formalized their offerings.
- One verified client reports 672% organic traffic growth and claims to be “leading every tracked competitor in LLM mentions — appearing in 7 out of 12 prompts.”
- Appears on multiple third-party “best LLM SEO agency” lists, including LenGreo roundup of LLM SEO agencies, which adds external credibility.
- The blended service model means you can combine GEO with Reddit, paid media, and CRO under one roof, reducing cross-agency friction.
Best for growth-stage B2B SaaS and eCommerce companies that want an integrated growth marketing approach combining GEO with paid ads and traditional SEO.
Less ideal if you’re solely looking for brand reputation management
Ideal for teams that value a single growth partner over a point solution. Just make sure you ask for current AI visibility dashboards, not just organic traffic charts, to validate the GEO muscle.
#2 Graphite
Graphite brings a rigorous, methodology-first approach to GEO that resonates especially with data-driven SaaS companies. The agency’s CEO, Ethan Smith, has built a reputation around formal GEO frameworks—think a 7-step optimization process, the 1/20 citation rule, and original citation overlap research.
- The standout case study: Webflow saw 8% of signups coming from LLM traffic, and those visitors converted at 6 times the rate of traditional Google search traffic.
- Multi-engine optimization is baked into every engagement, which matters because Originality.ai research found that only 7 out of 50 citation sources overlapped across AI Overview, ChatGPT, and Perplexity.
- Client list includes mid-market and enterprise names like MasterClass, Robinhood, Calm, and BetterUp.
- The methodology explicitly addresses both on-site content structure and off-site authority building.
Best for mid-market to enterprise B2B SaaS companies that need a disciplined, ROI-focused GEO partner.
Less ideal if you’re a small business wanting quick link building rather than a long-term, methodology-driven strategy.
Graphite’s reputation rests more on measurable outcomes than on a thick stack of Clutch reviews, so if you lean heavily on third-party ratings, you may find less social proof than some competitors offer.
#3 First Page Sage
Founded in 2009, First Page Sage was one of the early voices to formally define “Generative Engine Optimization.” That head start shows in a client roster that includes Salesforce, Logitech, Verizon, and Chanel—brands that don’t gamble on unproven tactics.
- Holds a 4.9 average review score from 18 Clutch reviews, with clients consistently praising detail-oriented and communicative teams.
- The agency’s own in-house content ranks prominently for GEO-related terms, serving as a living case study of its expertise.
- Serves regulated industries—fintech, medtech, manufacturing—where compliance and brand safety make experimental GEO tactics a non-starter.
- Combines reputation management with GEO, ensuring that what AI models cite about your brand aligns with the narrative you’ve built across the web.
Best for enterprises in regulated industries that want a full-service GEO partner with a long track record and conservative, proven methods.
Less ideal if you’re a fast-moving startup needing agile, experimental tactics—First Page Sage’s processes are more traditional and deliberate.
The agency also ranks itself highly on its own GEO agency list, and publicly available GEO-specific case studies aren’t especially detailed, so external validation of AI visibility results remains somewhat limited.
#4 iPullRank
iPullRank doesn’t do off-the-shelf services. Led by Mike King, the agency has pioneered “Relevance Engineering” (r19g), a channel-agnostic framework for positioning content inside AI information systems—not just search engines.
- King’s comprehensive “AI Search Manual” is widely cited as a definitive resource on how LLMs retrieve and cite content.
- The agency has delivered over $4 billion in organic search results for clients, according to its own claims.
- Proprietary local AI search citation data gives iPullRank an edge for brands with location-specific visibility goals.
- The methodology tackles off-site authority aggressively, which is vital given that roughly 85% of top-of-funnel AI citations come from third-party sources, not a brand’s own domain.
Best for enterprise organizations with complex, JavaScript-heavy sites that need advanced technical SEO fused with GEO.
Less ideal if you want a plug-and-play GEO service—iPullRank’s engagements are deeply custom and require significant investment.
There are no publicly accessible Clutch reviews, so your confidence will rest on Mike King’s thought leadership and the agency’s enterprise case studies rather than user review platforms.
#5 Rock The Rankings
Rock The Rankings takes a narrow, high-conviction approach: they serve only B2B SaaS companies and focus purely on AI search optimization. No paid media, no CRO—just GEO.
- Pricing is transparent at $5k–$10k+ per month with a 90-day initial commitment, and the agency holds a perfect 5.0 Clutch rating from 13 reviews.
- Founder-led with a team of 15, Rock The Rankings published a concrete case study: Churn Buster achieved 62% AI visibility across ChatGPT, Perplexity, and Claude within 72 hours of publishing LLM-optimized listicle content.
- That speed-to-citation aligns with Semrush’s finding that 50% of ChatGPT links point to business or service websites—well-structured listicles trigger citations fast.
- Exclusivity means the agency isn’t pulled in competing directions; every process is tuned for B2B SaaS AI visibility.
Best for B2B SaaS companies that want a dedicated, founder-led GEO agency with transparent pricing and a clear, rapid-results case study.
Less ideal if you’re outside B2B SaaS or need integrated paid media or CRO alongside GEO—this is purely a search play. The small team size may limit capacity for very large enterprises with sprawling international footprints.
#6 PressHERO
PressHERO solves a specific, high-impact piece of the GEO puzzle: getting your brand cited in the “best of” listicles and editorial roundups that AI models love to reference. Founder Maurizio Petrone has built a managed PR service around placements on sites with an average Domain Rating of 75.
- Placements go live fast—listicles within 14 days, link building within 28 days—and every link includes a 12-month guarantee with free replacement if it drops.
- Verified results: fashion brand AMARRA reversed a year-long organic decline with 80+ placements on BBC, Business Insider, and StyleCraze, quadrupling traffic.
- PressHERO’s own positioning is blunt: their placements are “the pages Google ranks, AI cites, and high-intent buyers read before purchasing,” directly tying their service to LLM visibility.
- The model aligns perfectly with the reality that a significant portion of top-of-funnel AI citations originates off-site. If you’re not on the lists the models scrape, you’re invisible.
Best for brands that need immediate, high-authority editorial placements that feed AI search engines.
Less ideal if you require a full-funnel GEO strategy with on-site technical optimization and content creation—PressHERO handles the placement layer, not the whole stack.
PressHERO’s own client logos include recognizable brands like Kape Technologies (ExpressVPN), WeThrift, and Eyeglasses.com, which builds confidence.
Caveats & Counterpoints
GEO is still young, and no agency has a decade-long track record to point to. Attribution remains tricky—most analytics platforms weren’t built to parse LLM referral paths cleanly.
Multi-engine optimization adds another layer of complexity. Only a handful of citation sources overlap across ChatGPT, Perplexity, and Google AI Overviews, so even the best agency can’t guarantee universal coverage.
AI citations themselves aren’t permanent; a link placement guarantee helps, but the persistence of AI-generated recommendations is still unproven.
And with retainers often running $5k to $10k or more per month, you need rigorous cost-value tracking even as conversion rates from AI visitors look promising.
What Comes Next
The AI search shift isn’t a fad—traffic is exploding, conversion rates are outpacing organic, and the playbook rewards agencies that build genuine LLM presence, not just keyword rankings.
The right partner balances your specific needs: off-site authority building (PressHERO), methodology-driven GEO (Graphite, First Page Sage), thought-leadership-backed enterprise expertise (iPullRank), or integrated growth (GMP).
Use the criteria and caveats above to ask hard questions and insist on verified AI search visibility—not just a new slide deck.
