Generative engine optimization tools measure where you stand in AI answers; a GEO agency does the work that changes those answers. If you have never measured, start with a tool. If you have the data and nobody to act on it, that is when an agency earns its fee.
What generative engine optimization actually covers
Generative engine optimization (GEO) is the work of getting your brand named and cited when someone asks an AI engine a question. The engines include ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews. Anyone comparing generative engine optimization tools with a GEO agency is really buying help with one of two jobs.
The first job is measuring. Which prompts name you? Which name a competitor? Which pages do the engines cite when they answer? The second job is changing the answer. That means rewriting pages so an engine can lift a clear answer from them, fixing site markup, getting listed on the third-party pages the engines already cite, and publishing what is missing.
The term comes from research. Aggarwal and colleagues named it in a paper, GEO: Generative Engine Optimization, accepted to KDD 2024. They reported visibility gains of up to 40% from changes to content. Notice what moved the number: the content changed. Measuring alone did not move it. For more on the work itself, read our guide to the new rules of GEO.
What generative engine optimization tools do well
Software is very good at the measuring job. It runs the same prompts again and again, records who gets named, and shows the change over time. It does that cheaply. Most AI search optimization tools work this way; they differ in which engines they cover and what they add on top. A few real examples:
- Semrush. The Semrush AI Visibility Toolkit gives an AI Visibility Score, prompt research, prompt tracking on Google AI Mode and ChatGPT, and an AI search site audit.
- SE Ranking. Its AI Search toolkit adds an AI Results Tracker and brings AI search into its competitive research.
- Otterly. Otterly monitors ChatGPT, Google AI Overviews, AI Mode, Gemini, Perplexity, Copilot and Claude. Pricing starts at $29 a month.
- Profound. Profound is a software platform with Answer Engine Insights, Prompt Volumes and Agent Analytics. It sells to agencies, but it does not describe doing client work itself.
There is no single best GEO tool. The right one depends on which engines your buyers use and how much detail you need. If you want the tools compared one by one, we did that in our comparison of Profound, Scrunch, Evertune and Otterly. This post asks a different question: is a tool enough on its own?
For many teams the honest answer is yes, at first. If you do not yet know where you stand, a tool is the cheapest way to find out. Start there before you hire anyone.
What the tools leave to you
A dashboard tells you that a competitor gets named and you do not. It cannot rewrite your page. It cannot fix the markup on your site. It cannot get you onto the review directory or the industry roundup that the engine keeps citing. Those jobs need a person with time and access.
Google makes a related point in its guidance on AI features and your website: "There are no additional requirements to appear in AI Overviews or AI Mode, nor other special optimizations necessary." In plain terms, there is no special switch to flip. The work is ordinary work done well: clear pages, sound markup, and a presence on the sites the engines trust.
What our own audit found about who gets named
We measured our own category to see what this looks like in practice. Our own audit ran 13 prompts a buyer might use to choose a GEO agency, across Perplexity, Gemini and Google AI Overviews.
The most visible brand in those answers was SE Ranking, a software company, at a 9.2% share. No agency owned the category. The pages the engines cited were YouTube, LinkedIn, agency sites, review directories, Reddit, Quora and one analyst post.
Two lessons follow. First, a category can be wide open, even one crowded with firms that sell this exact service. Second, most of what the engines cited were sites the brands do not own: video, social posts, directories and forums. A tool will show you that list. Getting onto it is the work. We explain why those third-party lists matter in our piece on best-of articles in AI answers.
A GEO tool and a GEO agency, side by side
Here is the split in one view.
| What you compare | GEO tool | GEO agency |
|---|---|---|
| Main job | Measures where you stand in AI answers | Does the work that changes the answers |
| What you get | A dashboard of prompts, mentions, citations and competitors | Rewritten pages, markup fixes, new content and outreach to cited sites |
| Who does the work | Your team | The agency, with your team's sign-off |
| How you pay | A subscription; Otterly starts at $29 a month | A service fee, quoted per engagement |
| Off-site pages | Shows which third-party pages get cited | Works to get you listed on them |
| Best when | You need to know where you stand and have people to act on it | You know the gap and lack the hands or skills to close it |
| Main risk | Data that nobody acts on | Paying for work your team could have done |
Which one you need
Start with a tool if you have never measured
If you do not know which prompts name you, you cannot plan the work. A tool answers that question for a small monthly cost. Run it, read the results, and see whether your team can act on them. Many teams can, and never need an agency.
Add an agency if you have the data and nobody to act on it
The dashboard shows the same missing citations every time you look, and the fixes sit on a list. If your writers and developers are already full, generative engine optimization services buy you the hands to do the work, not more data.
Hire a GEO agency first if the work needs skills you lack
Some fixes need a developer for markup, a writer who can turn a product page into clear answers, and someone to approach the review sites and roundups the engines cite. If you would have to hire three people to cover that, a generative engine optimization agency may cost less than building the team.
Use both if you want a check on the agency
A tool you own gives you an independent view of the results. A good agency will be glad you have one. If yours is not, ask why.
Questions to ask before you buy either
Ask a tool vendor:
- Which AI engines does it track, and do they match the ones your buyers use?
- Can you write your own prompts, or only use theirs?
- Does it show which pages get cited, not only whether you are named?
- Can you export the raw data?
Ask an agency:
- What exactly will you change, and where?
- Do you work on third-party sites, or only on ours?
- Can we see the same measurement data you see?
- Who writes the content, and who approves it?
For a longer set of tests, see our guide on how to choose a digital agency in the AI era.
How Pressfit approaches GEO
We are an agency, so read this section with that in mind. We use a proprietary citation-tracking platform for the measuring job. Most of our effort goes into the second job, changing the answer.
Our AI visibility work includes:
- cross-channel AI citation mapping
- a content audit for AI extraction readiness
- difficulty-scored content gap analysis
- YouTube optimization for AI answer engines
- a GEO (Generative Engine Optimization) playbook
Put simply, the tools tell you where you stand in AI answers; we do the work that moves it. If you already pay for a tool, keep it. It gives you an independent check on what we do.
If you want to talk through which one fits your team, get in touch with us.
FAQ
What are generative engine optimization tools?
They are software that measures how AI engines answer questions about your category. They run a set of prompts in engines like ChatGPT, Gemini, Perplexity and Google AI Overviews, then record which brands get named and which pages get cited. Semrush, SE Ranking, Otterly and Profound all sell tools of this kind.
What does a GEO agency do that a tool does not?
A tool shows you the gap. An agency does the work to close it: rewriting pages so an engine can lift a clear answer, fixing site markup, publishing what is missing, and working to get you listed on the third-party pages the engines already cite.
Do I need both a GEO tool and a GEO agency?
Not always. If you have never measured, start with a tool on its own. If you have the data and nobody to act on it, add an agency. Keeping a tool you own while an agency works is a sensible way to check the results for yourself.
Is there a special setup needed to appear in Google AI Overviews?
No. Google's own guidance says there are no additional requirements to appear in AI Overviews or AI Mode, and no special optimizations necessary. The work is ordinary work done well: clear pages, sound markup, and a presence on the sites the engines trust.
How much do generative engine optimization tools cost?
It varies by vendor and plan. Otterly's pricing starts at $29 a month. For other tools, check each vendor's own pricing page, since plans differ in how many prompts, engines and competitors they track.
Can a small team do GEO without an agency?
Yes, if it has someone who can write and someone who can change the site. A tool tells you where you stand. Many small teams can act on that themselves and never need an agency.