GEO Agency: How to Evaluate One Before You Sign

Here’s the uncomfortable part about hiring a GEO agency right now. Over 120 UK agencies added generative engine optimization to their service page in the last twelve months, but only 30 to 40 of them actually changed how they work. The rest updated their pitch deck and kept shipping the same keyword research they were delivering in 2023. So when you go looking for a partner to get you cited in ChatGPT, Perplexity, or Google’s AI Overviews, you’re wading through a market where the branding moved faster than the capability.

I’ve watched this pattern before. It happened with “growth hacking” around 2015, and “product-led growth” in 2020, where real disciplines got diluted the moment they became industry buzzwords. GEO is going through the same cycle now, except the stakes are higher because the buying behavior underneath it is genuinely shifting. AI Overviews now appear in 20% to 64% of Google searches depending on the category, and they cause a 61% drop in click-through rate for organic results. One in four B2B buyers is using AI more than Google to research suppliers. Citations matter more than clicks now, and most agencies aren’t equipped to move them.

This post is a buyer’s decision guide, not a pitch. I run Momentum Nexus, an AI-native growth studio, and GEO is part of what we do for clients, so I have a point of view. But my goal here is narrower and more useful to you: give you the criteria that actually separate an agency that can move AI citations from a vendor who rebranded a traffic report. If you want the mechanics of the discipline itself, start with our breakdown of why GEO and AEO are the new SEO, and for service details see our companion piece on answer engine optimization services. This one is about how to choose the provider.

What a GEO Agency Actually Does

Before you can evaluate one, you need a clear picture of the work, because half the mismatch in this market comes from buyers not knowing what “good” looks like.

Generative engine optimization is the practice of getting your brand retrieved, selected, and cited by AI systems when a buyer asks them a question. It’s different from traditional SEO in one structural way. SEO earns a click from a ranked list of blue links. GEO earns a mention inside a generated answer, where a click may never happen at all. Seer Interactive found that AI Overviews cause a 70% drop in click-through rate on organic results where they appear. The click is evaporating. The citation is the new prize.

A real GEO agency operates across a specific set of disciplines that don’t fully overlap with classic SEO:

• Entity coherence: AI systems build a representation of who you are from mentions across the open web, not just your site. The agency works on making your entity unambiguous across Wikipedia, review platforms, directories, LinkedIn, and third-party coverage.
• Answer-structured content: Pages get restructured so each section leads with a direct, extractable answer. One pattern practitioners report is that formatting every H2 with the answer in the first sentence roughly doubled Perplexity citations inside two months.
• Citation sourcing: The agency earns and audits the third-party pages that AI engines pull from. Perplexity favors fresh, well-cited articles. ChatGPT leans on authoritative long-form. Getting cited means seeding the sources the models trust.
• Prompt-space mapping: Instead of a keyword list, the agency maps the actual questions your buyers type into AI tools, then tracks how often each engine names you for those prompts.
• Multi-engine measurement: ChatGPT, Perplexity, Gemini, Claude, and Google AI Overviews each behave differently and get tracked separately. Answer share, citation rate, and sentiment are the real KPIs.

If a prospective agency can’t describe work in roughly these terms, you’re talking to an SEO team that renamed its existing service. That’s the core thing you’re screening for, and everything below is a way to pressure test it.

The Five Criteria That Separate Real GEO Agencies from Rebrands

I evaluate GEO agencies the same way I would evaluate a growth engineering hire. I want evidence of a system, not vocabulary. Here are the five criteria I would weight, roughly in order.

1. They measure AI citations, not just rankings

This is the fault line that splits the market. Ask directly: how do you measure success, and what does the monthly report show? The answer you want includes answer share across engines, citation frequency, and brand mention rate for your priority prompts. The answer that should worry you is a keyword ranking report with an “AI visibility” label pasted on top.

Real GEO agencies use tools built for this job. The two most credible platforms right now are Profound and Peec AI. Profound raised $58.5M, is SOC 2 certified, and tracks citations across ChatGPT, Perplexity, Google AI Overviews, and Gemini. Peec AI raised a $21M Series A and focuses on UI scraping to capture what users actually see. Both cost real money, which is why rebranded SEO shops don’t use them. If an agency can’t name their tracking stack, they’re not measuring what matters.

If attribution stops at impressions or blue-link positions, they’re not doing GEO. They’re doing SEO with new branding. Citations are the leading indicator here. They rise first, and traffic plus pipeline follow. A partner who can’t show you citation movement has no early read on whether the work is landing.

2. They can explain their process in engine-specific terms

Ask the agency to walk you through exactly what they do in the first 90 days. A real operator gives you specifics: an AI visibility audit, prompt research covering a defined set of 20 to 100 category queries, an entity cleanup pass, content restructuring on your highest-intent pages, and a tracking setup that reports citation rate per engine. A rebrand gives you a sentence like “we optimize your content for AI search” and then changes the subject. Vagueness at this stage is the single loudest signal in the entire evaluation.

The best agencies break it down like this:

Phase	Timeframe	What Happens	Deliverables
Baseline	Days 1-14	Audit current AI visibility, map prompt space, identify entity gaps	AI Visibility Audit with baseline mention rates per engine
Strategy	Days 15-30	Prioritize target prompts, plan content restructuring, map citation sources	90-Day GEO Roadmap with target engines and prompts
Implementation	Days 31-75	Restructure content, fix entity inconsistencies, seed third-party citations	Live content changes, tracking dashboard
Validation	Days 76-90	Measure citation lift, document wins, plan next quarter	90-Day Performance Report with citation rate changes

If an agency can’t show you something roughly this structured, they haven’t built a repeatable process yet. You’ll be the experiment.

3. They have proof, and the proof is about AI visibility specifically

Case studies are table stakes, but read them carefully. You want documented increases in AI citations, answer share, or LLM visibility for a named category, not a generic “300% organic traffic” chart from 2021. The tell is specificity: can they show you a before-and-after of how often ChatGPT named a client for a target prompt? Can they explain the mechanism that moved it?

The best case study I’ve seen recently came from a B2B SaaS company that went from 8% citation rate to 24% in 90 days, which translated to a 288% ROI and $64K in revenue tracked back to AI-driven leads. That’s the level of detail you want. Another study showed earned media driving a 239% median lift in citations versus owned content alone. These aren’t vanity metrics. They’re revenue-connected outcomes with clear causal links.

Agencies with real capability publish this kind of thing because it’s their best marketing. Agencies without it stay abstract.

4. They treat GEO as its own discipline, not a bolt-on

The strongest providers position GEO as a distinct practice with its own audit, its own tracking stack, and its own deliverables. They can articulate where it overlaps with SEO and PR and where it diverges. The weak ones fold it into an existing SEO retainer as a free bonus, which almost always means it gets zero dedicated hours. In our experience building growth systems, anything positioned as a bonus gets the effort of a bonus.

A dedicated GEO engagement should have:

• Separate scope from SEO (even if the same team executes)
• Distinct measurement (citation tracking, not rank tracking)
• Engine-specific tactics (what works for ChatGPT doesn’t work for Perplexity)
• Entity work beyond your owned properties (Wikipedia, review platforms, third-party coverage)

If an agency can’t show you where GEO ends and SEO begins, they’re bundling two disciplines they don’t fully understand.

5. They deploy content and entity work, they don’t just diagnose

There’s a whole tier of vendors who sell you an audit and a PDF, then hand execution back to your team. For most B2B founders at $50K to $150K MRR, that’s a non-starter, because your team doesn’t have the bandwidth to restructure 40 pages and earn citations across a dozen third-party sources. Ask whether they execute or advise.

A partner who ships the content, manages the entity work, and seeds third-party citations is worth several multiples of one who mails you a roadmap. The best GEO agencies are full-stack: they do the research, they do the writing, they manage the Wikipedia edits, they pitch the trade publications, and they track the results. The strategic consulting model doesn’t work here because the execution detail is where the value lives.

Understanding GEO Agency Pricing: What You’re Actually Buying

Pricing is where misalignment shows up first. Here’s what GEO agency services actually cost and what’s included at each tier.

The market breaks into three levels:

Tier	Monthly Cost	What’s Included	Who It’s For
Entry	$1,000-$2,500	Limited audit, content recommendations, basic tracking (1-2 engines)	Very early-stage SaaS testing GEO
Mid-market	$5,000-$10,000	Full audit, content execution, entity work, multi-engine tracking, monthly reporting	Most B2B SaaS ($1M-$10M ARR)
Enterprise	$10,000-$25,000+	Dedicated team, proprietary data, advanced entity management, competitive displacement	$20M+ ARR with large content libraries

Most B2B SaaS companies in the $50K to $150K MRR range should expect to pay $5K to $10K per month for real GEO work. Anything significantly below $5K is either scope-limited (audit only, no execution) or the agency is underpricing to win business and will deliver accordingly. Anything above $15K for a company your size suggests you’re paying enterprise rates for mid-market scope.

A few pricing red flags to watch for:

Red flag: Percentage of ad spend billing. This model doesn’t apply to GEO, which is earned visibility, not paid. If an agency tries to charge you a percentage of something, they’re importing a paid ads pricing model into the wrong discipline.

Red flag: Guaranteed citation volume. Anyone promising “we’ll get you cited 50 times per month in ChatGPT” is either naive or lying. You can’t control what a model outputs for a given prompt. Agencies can increase your citation likelihood through better content and entity work, but guarantees are impossible. Walk away.

Red flag: Suspiciously low bundled pricing. “SEO + GEO for $2,500/month total” means neither is getting real hours. Separate the disciplines or pick one to prioritize.

Launch fees: Many agencies charge $5K to $20K upfront for the initial audit, strategy, and tracking setup. This is reasonable if you can see the deliverable (usually a 30 to 50-page audit document with baseline citation rates, target prompts, and a 90-day roadmap). If they can’t show you what the launch fee produces, it’s padding.

The Questions to Ask Before You Sign

Screening happens live. Here are the questions I would put to any GEO agency on the first call, and what a strong answer sounds like.

“Which engines do you track, and how?” You want named tools and named engines: separate tracking for ChatGPT, Perplexity, Gemini, Claude, and Google AI Overviews, using a platform like Profound, Peec AI, or an equivalent. A vague “we monitor AI search” is a fail. Any competent agency has a specific stack and can name it.

“Show me a client whose citation rate you moved, and explain how.” You’re testing for a documented mechanism, not a vanity metric. The answer should connect a specific action, such as restructuring answer formatting or fixing an entity inconsistency, to a measured lift in how often an engine named the client.

“What does month one actually deliver versus month six?” A real partner sets honest expectations on timing. First citations can land in days to weeks for a well-structured page. Answer share climbs over months. Durable traffic and pipeline take quarters. If they promise fast results across the board, they’re selling.

“Do you guarantee specific citations?” The correct answer is no. Nobody controls what a model outputs for a given prompt. Any agency guaranteeing you will be cited by ChatGPT for a keyword is either naive or lying. Walk away.

“How do you connect AI visibility to revenue?” The best providers can at least frame the path from citation to consideration to pipeline, even if attribution in AI search is genuinely hard. If attribution stops at impressions, ask how they will help you tie it to outcomes. We go deep on tying activity to revenue in our content marketing ROI measurement framework, and the same discipline applies here.

“What have you learned this quarter that changed your approach?” This separates operators from order-takers. A team running real experiments always has an answer. If they can’t name a single thing that shifted in their methodology based on recent testing, they’re reacting to the market instead of reading it.

GEO vs AEO: When You Need Which

You’ll hear these terms used interchangeably, and they’re related but not identical. Understanding the difference helps you pick the right partner.

AEO (Answer Engine Optimization) is about being the answer. It focuses on optimizing content to be extracted as the direct response to a query, primarily in Google’s featured snippets and AI Overviews. AEO is Google-first, and the tactics center on answer formatting, schema markup, and zero-click optimization. The goal is to own the snippet.

GEO (Generative Engine Optimization) is about being the source. It focuses on getting cited across multiple AI platforms (ChatGPT, Perplexity, Claude, Gemini, plus Google AI Overviews). GEO is multi-engine, and the tactics center on entity coherence, third-party coverage, and content that LLMs retrieve when synthesizing answers. The goal is to be named in the answer, even if the user never clicks through.

The overlap is real. Content that ranks well in traditional SEO often feeds Google AI Overviews, and answer-formatted content helps both AEO and GEO. But the measurement, the entity work, and the multi-platform focus are genuinely different crafts. The mistake I see founders make is assuming their incumbent SEO agency automatically inherits GEO capability. Most haven’t built it.

If your incumbent is strong on the fundamentals, the right move may be to keep them for organic and add a GEO specialist, rather than swap wholesale. For more on the distinction, see our detailed breakdown of AEO vs GEO.

Red Flags That Should End the Conversation

Some signals are disqualifying on their own. If you see these, stop.

1. Rebranded SEO with no measurement change. They talk about AI but their reporting is still keyword rankings. This is the most common trap, and choosing a vendor that only rebrands language typically costs you six to twelve months of lost AI visibility while competitors who picked real GEO partners pull ahead.

2. Guaranteed citations. As covered above, nobody can promise a model will name you. A guarantee is a lie dressed as confidence.

3. No named tracking stack. If they can’t tell you which tools measure your AI visibility, they’re not measuring it. Period.

4. All strategy, no execution. An audit and a PDF with execution handed back to you is a bad fit for a resource-constrained team. You need a partner who ships.

5. No published point of view. Agencies that are genuinely in this discipline write about it and run experiments. Silence suggests they’re following, not leading. Check their blog. If they haven’t published anything about GEO tactics, case studies, or learning, they’re not in the game yet.

6. Over-reliance on one lever. A vendor who only does technical schema, or only does content, or only does PR, is missing the system. GEO is entity plus content plus citations plus measurement working together.

7. 12-month contracts without proof. A 12-month lock before proving anything is protecting themselves, not serving you. The smart entry point is a paid pilot: an audit plus tracking setup, or a scoped 90-day engagement with measurable goals. A partner confident in their work will happily start scoped. One who insists on a year upfront before delivering anything is a pass.

How to Run the Evaluation: A 3-Week Process

You don’t need a six-month RFP. Here’s the process I would run to choose a GEO agency in three weeks.

Week 1: Define your prompt space and baseline. Before you talk to anyone, list the 20 to 50 questions your buyers actually ask AI tools when they’re looking for what you sell. Run those prompts yourself across ChatGPT, Perplexity, and Gemini, and note where you appear and where a competitor does instead. This is your baseline, and it makes you a far sharper buyer because you can hand any agency a concrete starting point and ask what they would do with it.

For a B2B SaaS selling project management software, the prompt set might include “best project management tool for remote teams”, “Asana vs Monday vs Notion”, “project management software for agencies”, and 20 more like that. Run each prompt in at least three engines. Screenshot the results. Count how many times your brand appears, how many times competitors appear, and in what context.

Week 2: Run discovery calls with three providers. Use the questions above. Score each on the five criteria. Pay attention to specificity over polish. The best operators are often less slick than the rebrands, because they’re describing real work instead of selling a narrative.

Create a simple scorecard:

Criteria	Agency A	Agency B	Agency C
Citation measurement (not rankings)	1-5	1-5	1-5
Engine-specific process detail	1-5	1-5	1-5
AI visibility case studies	1-5	1-5	1-5
GEO as distinct discipline	1-5	1-5	1-5
Full execution (not just strategy)	1-5	1-5	1-5
Total	/25	/25	/25

The agency that scores highest on measurement and execution typically wins, because those predict whether you’ll see results.

Week 3: Buy a scoped trial, not a year. The smart entry point is a paid pilot. This lets you test capability and working style before you commit to a retainer. Common scoped engagements:

• Audit + roadmap: $5K to $10K. Baseline AI visibility, prompt research, 90-day plan. Deliverable is a document you own. Timeline: 2-3 weeks.
• Single content cluster: $8K to $15K. Take one product category, restructure 10-15 pages for GEO, track citation lift for 90 days. Proves execution quality.
• 90-day pilot: $15K to $30K total. Full baseline, strategy, implementation, and validation. Structured exit if results don’t land.

A partner confident in their work will happily start scoped. One who insists on a 12-month commitment before proving anything is a pass.

By the end of week three you will have a baseline, three scored providers, and a low-risk way to test the front-runner. That’s a better decision process than most companies run for hires that cost ten times as much.

What to Expect in the First 90 Days

Once you sign, here’s what a well-structured engagement looks like, based on the 90-day model we use at Momentum Nexus and the best practices I’ve seen across the industry.

Month 1: Baseline and strategy. The agency audits your current AI visibility across target engines, maps the prompt space (which questions buyers are asking), identifies entity gaps (where your brand representation is inconsistent), and builds a 90-day roadmap. Deliverable: a baseline report showing current citation rates per engine and a prioritized plan.

Month 2: Implementation. Content gets restructured for answer formatting. Entity inconsistencies get fixed (Wikipedia, directories, review platforms). Third-party citation sources get seeded (earned media, guest posts, expert quotes in trade publications). Tracking dashboards go live. You should see early citation movement by the end of month two if the tactics are landing.

Month 3: Validation and optimization. The agency measures citation lift, documents what worked, kills what didn’t, and plans the next quarter. Deliverable: a 90-day performance report with citation rate changes per engine, traffic impact, and recommended adjustments.

Expected results at 90 days for a mid-market B2B SaaS:

• 25% to 50% visibility lift in target prompts across monitored engines
• 20% to 35% increase in AI-driven leads (trackable via UTM parameters or referral data)
• Documented citation growth in at least two engines (typically Perplexity and ChatGPT move fastest)

If you’re not seeing measurable citation movement by day 90, something’s broken. Either the tactics aren’t working, the prompt space wasn’t the right one, or the agency isn’t executing. That’s the checkpoint where you decide: does this continue, or do we part ways?

The structure I described in detail in The 90-Day Growth Sprint applies whether you’re working with Momentum Nexus or evaluating any other GEO agency. The forcing function of a 90-day checkpoint prevents the comfortable drift that kills most retainer relationships.

Where GEO Fits in Your Broader Growth System

One last piece of context, because I don’t want you to over-index on GEO as a standalone silver bullet. Generative engine optimization is a channel, and a channel only compounds when it connects to the rest of your growth engine. The citation you earn in Perplexity has to land on a page that converts. The buyer who discovers you through an AI answer still enters a pipeline that has to nurture and close them. GEO feeds the top of a system, it’s not the system.

The best GEO agency for you is the one that understands this. They will ask about your positioning, your funnel, and your conversion path, not just your keyword list, because they know a citation that leads to a weak page is wasted work. This is the same reason we treat GEO as one component inside a connected growth architecture at Momentum Nexus rather than a bolt-on service. As I’ve written before, growth is an engineering problem, and AI visibility is one subsystem inside it.

So when you evaluate providers, weight the ones who think in systems. A GEO agency that can move your answer share inside ChatGPT and Perplexity is valuable. An agency that can do that while making sure the traffic converts and ties back to pipeline is worth far more.

If you’re trying to figure out where GEO fits in your specific situation, and whether you need a specialist, an add-on to your current SEO, or a broader growth partner, that’s exactly the kind of thing we map in a free growth audit. Book one and we’ll look at your current AI visibility, your prompt space, and your funnel, then tell you honestly where the leverage is. And if you just want to start measuring, try the free AI growth tools at app.momentumnexus.com to get a baseline on where you stand today.