ExplainerStrategy
How to Choose an SEO Agency: A 12-Question Checklist
by the AEO GEO Labs team6 min read
How to choose an SEO agency comes down to a simple process: define the outcome you need, shortlist three agencies with relevant experience, and ask each the same 12 questions about method, measurement, reporting and contract terms. Score the answers side by side. Pick the agency that explains its work most clearly and measures it most honestly, not the one with the boldest promises.
In 2026 that decision includes a question older checklists miss: whether the agency understands how AI answers now sit on top of search results. We cover that in our framework for GEO, AEO and SEO. This page is the practical part: the questions, the red flags, and a scorecard you can copy.
How to choose an SEO agency in 5 steps
Choosing an SEO agency well takes five steps, and most bad hires skip the first one.
- Define the outcome. Write down what success means in business terms: more demo requests from organic search, recovery after a migration, more visibility for a product category. "Better SEO" is not an outcome.
- Collect your baseline. Export the last 12 months of Search Console clicks and impressions, and note which pages bring in leads. You will need this to judge proposals and, later, results.
- Shortlist three agencies. Look for experience with your type of site and business model. A local services agency and an enterprise SaaS agency do very different work.
- Ask all three the same 12 questions. Same questions, same order, so answers are comparable.
- Score and check references. Use the scorecard below, then speak to at least one current client of your top choice.
The 12-question checklist
These 12 questions test whether an SEO agency has a real method, measures honestly, and will leave you better off even if you part ways. Ask every one.
Strategy and fit
- "What would you work on first for our site, and why?" A strong answer is specific to your site and ties each priority to a business outcome. A generic list of services is a weak answer.
- "What results do you expect, and in what timeframe?" Google's own advice on hiring an SEO suggests asking exactly this. Look for ranges and caveats, not guarantees.
- "What experience do you have with sites like ours?" Ask for examples in your industry or business model, and what changed as a result.
Method
- "How do you approach technical SEO?" They should mention crawling, indexing, rendering and site speed, and how they get fixes shipped by your developers.
- "How do you decide what content to create or update?" Good answers start from search demand and buyer questions, then check what already ranks.
- "How do you earn links and mentions?" Listen for digital PR, partnerships and content worth citing. Paid link schemes violate Google's spam policies.
- "How do you handle AI search?" As of October 2026, Google AI Overviews, AI Mode and ChatGPT search all build answers from indexed pages. An agency should explain how it makes your pages easy to quote and how it tracks AI mentions. If this is a priority, see our guide on choosing an AI SEO agency.
Measurement and reporting
- "What will you report, and how often?" Expect business metrics such as organic leads alongside rankings and traffic, on a regular cadence.
- "Will you share every change you make to our site?" Another question straight from Google's hiring guide. The answer must be yes.
- "Can we see a sample report?" It shows you what you will actually receive, which is often different from what the sales deck says.
Contract and ownership
- "Who will do the work?" Ask to meet the people on your account, not only the person selling it.
- "What do we keep if we leave?" You should keep all content, data, accounts and tracking setups. Check the notice period too.
If you want to start with a one-off engagement before a retainer, our guide to SEO audit services explains what a good audit includes.
Red flags when choosing an SEO agency
The clearest red flag is a guarantee. Google states plainly that no one can guarantee a number one ranking, and the same logic applies to AI answers.
| Red flag | Why it matters |
|---|---|
| Guaranteed rankings or guaranteed AI placement | Nobody outside the search engine controls its results |
| Secrecy about methods | You can't judge risk if you can't see the work |
| Unsolicited cold outreach claiming they "found problems" | Google warns to be wary of SEO firms that email out of the blue |
| Link packages sold by the hundred | Bought links risk a manual action under Google's spam policies |
| Reporting with no business metrics | Rankings without leads can hide a lack of impact |
| Long lock-in contracts with no exit clause | You can't walk away if results don't come |
Run a quick check of your own key pages with the on-page SEO checker before calls. If an agency's pitch doesn't mention issues you can see in five minutes, that tells you how closely they looked.
What "top SEO agency" really means
A top SEO agency is the one that fits your site, your budget and your goals, not the one at the top of a ranked list. Most "top agency" lists are paid placements or directories that rank by reviews and spend, and they rarely test the work itself.
Fit beats fame. Large agencies may put a junior team on smaller accounts, and the agency best for an ecommerce store may be wrong for a B2B software company. Use lists to find names, then use the checklist to decide.
Score your shortlist
Scoring each agency on the same criteria turns a gut decision into a comparison. Rate each from 1 to 5 after the calls.
| Criterion | Agency A | Agency B | Agency C |
|---|---|---|---|
| Specific first-90-days plan | |||
| Realistic expectations and timeframe | |||
| Technical SEO depth | |||
| Content and link method within Google's policies | |||
| AI search approach and tracking | |||
| Reporting tied to business metrics | |||
| Transparency about changes | |||
| Clear ownership and exit terms |
Weight the rows that match your outcome. A company recovering from a migration should weight technical depth. A company whose buyers research in ChatGPT should weight the AI search row.
Frequently asked questions
How many SEO agencies should I talk to before choosing one?
Talk to three. Fewer than three gives you no real comparison, and more than five usually adds calls without adding new information. Ask each the same questions in the same order, take notes, and score them against the same criteria straight after each call. Then check at least one reference for the agency you rank first before signing.
How long should an SEO agency contract be?
A sensible SEO agency contract runs month to month or for a short initial term with a clear notice period. SEO results usually take several months to show, so a short trial is rarely enough to judge outcomes, but long lock-ins remove your ability to leave if the work is poor. Make sure the contract states what you keep when it ends.
Should an SEO agency also handle AI search?
Yes, in most cases. As of October 2026, AI answers in Google AI Overviews, AI Mode, ChatGPT and Perplexity are built from indexed web pages, so SEO and AI search share the same foundation. An agency should at least make your pages easy for AI engines to quote and track whether they mention you. Specialist AI search work matters most when buyers ask AI assistants what to buy.
What questions does Google recommend asking an SEO?
Google's Search Central guide to hiring an SEO suggests asking for examples of previous work, whether the agency follows Google Search Essentials, what results to expect and in what timeframe, its experience in your industry and location, how long it has been in business, and whether it will share all changes made to your site. It also warns against anyone guaranteeing rankings.
If you want an agency that covers SEO and AI search with one measurement system, AEO GEO Labs runs GEO, AEO and SEO programs for B2B and SaaS teams. See our services.