What are the best GEO agencies? An agency's view on how to choose one

You are reading this on an agency's site, so discount accordingly. We are not going to give you a ranked list of competitors with ourselves at the top. What we can do is describe what good GEO work looks like from the inside, so you can judge any agency, including us, against something concrete.

What GEO work actually consists of

Generative engine optimization is the job of getting AI engines to mention, cite, and recommend a brand in answers. In practice it breaks into four parts.

1. Measurement. Which prompts matter to buyers, which engines answer them, and where the brand stands. This is the base layer. Without it, everything else is guesswork.
2. Diagnosis. Why the brand is or is not showing up. Are crawlers reaching the pages? Which pages get cited, and which competitor pages get cited instead? Which third-party sites do the engines trust in this category?
3. Content and technical fixes. New pages that answer questions the brand currently misses, refreshed pages, structured data that matches what is visible, and crawl access fixed at the CDN or robots level.
4. Off-site work. Reviews, community threads, listicles and press that engines read when they build an answer. This part is slow and cannot be bought quickly.

An agency that sells only the third part, publishing volume, is skipping the two steps that tell you what to publish.

The agency types you will see

Large retainer teams. Embedded strategists, writers, and technical specialists on a longer term. They suit enterprises with budget and patience.

Managed services with a login. You get a dashboard and humans who write pages and run outreach. Often a good middle option.

Vertical specialists. Focused on one platform, one industry, or one country. They know the buyer questions in that space, which saves time.

Link and PR shops adding GEO. Strong on placements. Check how they measure results, since placements alone do not prove AI visibility changed.

Questions we would ask if we were the buyer

1. How do you measure? You want a named prompt set, a named list of engines, a refresh frequency, and an explanation of how results are sampled. A single manual check in ChatGPT is not measurement.
2. Can I see the data? Ask for read access to the platform the agency uses for your account, or regular exports. A monthly PDF with no source is a risk.
3. What do you diagnose before you write? Good answers mention citations, crawler access, and content gaps.
4. What do you promise? The right answer is that nobody can guarantee a recommendation. Language like "guaranteed placement in ChatGPT" is a red flag.
5. What is the term? For a new discipline, a short initial scope with a clear review point beats a long lock-in.
6. Who does the work? Ask who writes, who handles technical fixes, and who you will talk to.

The platform your agency runs on matters

We run client programs on Promptwatch. We chose it because it covers more of the measurement and diagnosis layers in one place than a pure tracker does: prompt tracking by topic, persona, and country; citation analytics down to page level, including Reddit and YouTube; IP-verified AI crawler logs through Agent Analytics; and visitor analytics that connect AI-referred visits to conversions.

That matters for you as a buyer. If your agency can see crawler logs, it can tell you whether GPTBot or ClaudeBot reached the page it wants cited. If it has visitor analytics, it can show whether AI traffic converts. If it only has a mention score, expect proposals built on mentions alone.

Other agencies use other platforms, and that is fine. The point is to ask. A good agency will tell you what it uses, why, and what it cannot see with it.

Warning signs in a proposal

• Output counts without a diagnosis ("20 articles a month") and no mention of which gaps they fill.
• Case studies with percentages but no named client, no time frame, and no method.
• A measurement section that only lists "brand mentions."
• No mention of what AI tracking cannot do, such as guarantee a recommendation.
• Pricing so vague you cannot compare it with another proposal.

Should you hire at all?

Some teams should not. If you have an in-house SEO or content lead, a month with a platform may tell you enough to build the first 90 days yourself. Hire when you lack the capacity, the specialist skills, or the off-site relationships. An agency earns its fee on execution speed and judgement, not on access to a tool you could buy.

If you do hire, ask for a diagnosis in the first two weeks: the prompts they would track, the pages that are cited today, the competitors that appear instead of you, and whether AI crawlers can reach your key pages. Any agency worth hiring can produce that quickly, and it is the best preview of how they will work for the rest of the engagement.