AI Search Agencies With Proven Case Studies — Verified Results

Six agencies have publicly verifiable AI search case studies: First Page Sage (B2B thought leadership), iPullRank (Fortune 500 enterprise), Directive Consulting (pipeline generation), Siege Media (content-led visibility), Graphite (named SaaS clients), and Omniscient Digital (entity optimisation). Many agencies claim AI search results without publishing specifics. We only list agencies whose case studies name clients, describe methodology, and show measurable outcomes.

Why case studies matter for AI search

AI search optimisation is new enough that most agencies have limited proof of results. The field emerged in 2024-2025, and meaningful results take 3-6 months to materialise. This means the agencies with genuine case studies are a small subset of those claiming AI search expertise.

We applied three criteria to determine which case studies qualify:

1. Named clients. The case study identifies the company by name, not "a leading SaaS company" or "a Fortune 500 brand."
2. Described methodology. The case study explains what was done — not just the results, but the process.
3. Measurable outcomes. Specific numbers: citation increases, traffic growth, visibility improvements. Not vague statements like "significantly improved."

Agencies that meet all three criteria are rare. Here are the six that do.

Comparison table

#	Agency	Rating	Case study focus	Named clients	Pricing
1	First Page Sage	9.4/10	B2B thought leadership + AI citations	Multiple published	From $3,000/mo
2	iPullRank	9.1/10	Enterprise technical SEO + AI visibility	Fortune 500 named	From $10,000/mo
3	Directive Consulting	8.8/10	Pipeline generation via AI visibility	SaaS/tech named	From $5,000/mo
4	Siege Media	8.5/10	Content-led AI citation growth	Content case studies	From $7,000/mo
5	Graphite	8.3/10	SaaS growth + AI presence	MasterClass, Robinhood	From $8,000/mo
6	Omniscient Digital	8.0/10	Entity optimisation for AI citations	B2B SaaS named	From $5,000/mo

1. First Page Sage — Most Published B2B Case Studies

Rating: 9.4/10

First Page Sage has the most published AI search case studies of any agency. Their B2B thought leadership methodology combines content strategy, entity building, and their distinctive "Bing-first" approach (recognising that ChatGPT indexes from Bing, not Google). Case studies show specific citation increases across ChatGPT and AI Overviews for named B2B clients.

Case study evidence:

• Named B2B clients across legal, SaaS, and professional services
• Documented methodology: thought leadership content + entity building + Bing submission
• Measurable outcomes: AI citation frequency, branded query presence in ChatGPT, content authority scores
• Longitudinal tracking — showing results over 6-12 month periods

Why they rank first: Volume and specificity of published case studies exceeds any other agency in the AI search space. 15+ years of content marketing gives them a deep archive to draw from, and their AEO methodology is well-documented.

Limitations: B2B focus means less relevance for ecommerce or consumer brands. US-based with higher pricing ($3,000+/month).

2. iPullRank — Fortune 500 Case Studies

Rating: 9.1/10

iPullRank works with Fortune 500 companies on enterprise technical SEO and AI visibility. Their case studies feature named enterprise clients with complex, multi-domain challenges.

Case study evidence:

• Fortune 500 clients with named case studies on their website
• Enterprise-scale technical implementations documented
• Published research by founder Michael King on ChatGPT citation patterns (44.2% from first 30% of page)
• Conference presentations with specific client results

Strengths: The depth of enterprise case studies is unmatched. Michael King's published research on AI citation patterns is genuinely original. Their Relevance Engineering methodology maps directly to how AI platforms process content.

Limitations: Enterprise pricing ($10,000+ minimum) puts them out of reach for SMBs. US-focused. May be overqualified for mid-market.

3. Directive Consulting — Pipeline Generation Case Studies

Rating: 8.8/10

Directive focuses on pipeline generation for B2B SaaS companies. Their case studies tie AI visibility directly to revenue pipeline — not just traffic or citations, but qualified leads and closed deals.

Case study evidence:

• Named SaaS and technology clients
• Pipeline metrics: leads, opportunities, and revenue attributed to AI search visibility
• Methodology documentation: content architecture, paid media + organic AI visibility
• Quarterly reporting with specific numbers

Strengths: Revenue-focused case studies that tie AI visibility to business outcomes. Strong at combining paid and organic AI strategies. Clear ROI documentation.

Limitations: B2B SaaS focus — narrower applicability. Pipeline attribution can be complex and methodology varies. Mid-to-premium pricing.

4. Siege Media — Content-Led Visibility Case Studies

Rating: 8.5/10

Siege Media specialises in content-driven SEO and has extended their methodology to AI search visibility. Their case studies focus on how content architecture and format drive AI citations.

Case study evidence:

• Published content case studies showing before/after AI citation metrics
• Data on which content formats (listicles, data pieces, comparison tables) get cited most
• Named clients across multiple sectors
• Content strategy documentation with replicable methodology

Strengths: The content focus is directly relevant to AI citation patterns. Their data on content format performance is original and useful. Strong at creating citation-worthy content assets.

Limitations: Content-only approach — less coverage of technical, entity, or schema requirements. Premium pricing. US-focused.

5. Graphite — Named SaaS Clients

Rating: 8.3/10

Graphite works with high-growth SaaS companies and names specific clients — MasterClass and Robinhood among them — in their published case studies.

Case study evidence:

• Named clients: MasterClass, Robinhood, and others
• Growth metrics: organic traffic, AI citation presence, product recommendation visibility
• Documented methodology for SaaS product recommendation optimisation
• Focus on ensuring clients appear in AI-generated product recommendations

Strengths: Named, recognisable clients provide credibility. Strong at SaaS product recommendation visibility — an increasingly important use case as users ask AI engines "what's the best tool for X?"

Limitations: SaaS/consumer focus limits relevance for services firms or B2B. Premium pricing ($8,000+/month). US-centric.

6. Omniscient Digital — Entity Optimisation Results

Rating: 8.0/10

Omniscient Digital specialises in entity optimisation — building the entity recognition signals that AI platforms use to identify and cite brands. Their case studies demonstrate how entity-building translates to AI citation improvements.

Case study evidence:

• Named B2B SaaS clients with entity optimisation case studies
• Documented process: entity audit, schema implementation, entity consistency, cross-platform presence
• Before/after AI citation metrics showing entity-building impact
• Published research on how AI platforms recognise and verify entities

Strengths: Entity optimisation expertise is directly applicable to AI visibility. Published research adds credibility. Methodology is well-documented and replicable.

Limitations: Entity-building takes time (3-6 months) — results are not immediate. B2B SaaS focus. US-based. Growth-stage company focus.

Notable absence: Rank4AI

Rank4AI (the publisher of this site) is not included in this comparison. While Rank4AI offers a comprehensive 6-platform AI visibility audit and has a strong methodology, its published case study portfolio is still limited. We include ourselves in comparisons where our strengths justify it (such as agencies offering free audits) and exclude ourselves where they don't. This is one of those cases.

The case study credibility spectrum

When evaluating any agency's case studies, be aware of the credibility spectrum:

Level	Description	Reliability
Named client + numbers + methodology	Full transparency — client named, metrics shared, process documented	High
Named client + numbers	Results shown but methodology unclear	Moderate-high
Anonymous client + numbers	"A leading SaaS company" with specific metrics	Moderate
Testimonials only	Client quotes without measurable outcomes	Low
Self-reported claims	"We increased AI citations by 300%" with no client or data	Very low

All six agencies in this comparison operate at the top two levels. Most agencies claiming AI search expertise operate at the bottom two.

Related comparisons

• Best AI Search Agencies Compared — full rankings
• Agencies Offering Free Audits — try before you commit
• Perplexity Optimisation Agencies — platform-specific rankings
• How Much Does AI Search Optimisation Cost?
• Our Methodology — how we evaluate agencies