Agency buying guide
Ranking well on Google no longer guarantees you show up in AI answers, and most agencies haven't caught up. Here's how to tell the ones that have from the ones that will cost you months and money.
Why Picking an SEO Agency Feels Like a Gamble
SEO is unusually hard to judge from the outside. The work is largely invisible (changes to site structure, content rewrites, link acquisition) and results take months to surface. That gap between effort and evidence makes it easy for a bad agency to look fine for a while, and for a good one to look slow. Knowing how to choose an SEO agency before you sign anything is therefore worth more than any post-purchase review.
This guide is written for UK business owners and marketing managers who want to buy well. It covers what good SEO work actually involves in 2026, the right questions to ask any agency, and the red flags that should make you walk away.
What Good SEO Work Looks Like Today
Search has changed. Google now answers many queries directly with AI Overviews (summaries pulled from trusted sources) and AI assistants like ChatGPT and Perplexity cite websites when recommending businesses. That means SEO is no longer just about ranking in a list of ten blue links. Visibility in AI-generated answers is a real, measurable outcome that good agencies are already working towards.
That said, the fundamentals haven't disappeared. A reputable agency will cover all of the following.
Technical health
Your site needs to load quickly, work on mobile, and be structured so that search engines can crawl and index it properly. This includes fixing broken links, managing duplicate content, and ensuring your Core Web Vitals (Google's page-experience signals) are in good shape. Technical issues are the most common reason a site stalls despite good content.
Useful content
Google's ranking systems reward pages that genuinely answer what someone is searching for. That means content needs to be accurate, written for people, and regularly maintained. An agency that churns out thin articles at scale is storing up problems.
Real authority and digital PR
Links from other websites remain one of Google's strongest ranking signals. The quality of those links matters far more than the quantity. Earning coverage on relevant, respected sites (through original research, expert comment, or genuinely newsworthy content) is how ethical SEO is done. Any agency that offers hundreds of links for a low monthly fee is almost certainly using methods that will cause harm eventually.
Local SEO where relevant
If your customers come from a specific area, local search is its own discipline. It involves your Google Business Profile, local citations, and content that connects your services to the places you serve. This is distinct from national SEO and priced differently, something to clarify early.
Visibility in AI answers
Being cited by AI tools when someone asks a relevant question is becoming a commercial priority. Good agencies can audit your current AI visibility, identify what's needed to improve it, and report on it over time. If an agency you speak to hasn't thought about this, that tells you something.
This matters more than many agencies admit. In our own study of 360 everyday UK searches in October 2026, about seven in ten of the sites cited in Google's AI Overviews (69%, or 1,252 of 1,804 citations) did not appear in Google's top 10 ordinary results for the same search, and ChatGPT, Gemini, Perplexity and Claude also cited mostly sites outside the top 10. Ranking well on Google no longer guarantees you show up in AI answers. Read the full study.
Questions to Ask, and What Good Answers Sound Like
This is where most buyer mistakes happen. Vague questions get vague answers. These are specific enough to separate a prepared agency from one winging it.
Strategy and first 90 days
Ask: "What will the first 90 days look like, and what will you have delivered by the end of it?"
A good answer describes a structured audit phase, a clear prioritisation of issues found, and an explanation of how they'll sequence their work. A bad answer is a list of services with no plan behind it.
Who does the work
Ask: "Will our account be managed by a specialist or passed to a junior? Will any work be outsourced?"
A good answer names the person or team, explains their background, and is honest if certain tasks (such as content writing) involve external contributors. Outsourcing isn't automatically a problem, but opacity about it is.
How links are earned
Ask: "Can you show me examples of links you've earned for clients in the last six months, and explain how you got them?"
A good answer includes real examples from recognisable publications, with a clear account of the outreach or editorial process behind them.
How AI search is covered
Ask: "How are you measuring and improving our visibility in AI-generated answers?"
A good answer references tools, audit processes, and reporting. You can check how AI currently sees your business with a free report before you even speak to anyone.
Reporting and KPIs
Ask: "What will you report on, and how does that connect to leads or sales?"
A good answer includes organic traffic, keyword visibility and conversions alongside ranking positions. Rankings are a means to an end.
Contract length and notice period
Ask: "What's the minimum commitment, and what notice do I need to give to leave?"
A good answer is transparent. For reference, our SEO packages at Sayu run for an initial six months, then continue on one month's notice, giving the campaign time to gain traction without locking you in indefinitely.
What you own at the end
Ask: "If we part ways, do we keep the content, the links, and access to all our data?"
A good answer is an unqualified yes. If the answer involves any kind of "it depends", ask what it depends on.
Red Flags That Should End the Conversation
- Guaranteed #1 rankings. No agency controls Google's algorithm. Any guarantee of a specific position is either dishonest or meaningless.
- Cheap bulk links. Packages promising hundreds of links for a low fee use low-quality or artificial methods. These can trigger Google penalties that take far longer to recover from than to cause.
- Secret methods. Legitimate SEO is explainable. If an agency says its approach is proprietary and can't be shared, treat that as a warning.
- No access to your own data. You should always own your Google Search Console and Analytics accounts. If an agency won't set these up in your name, leave.
- Reports that only show rankings. Rankings fluctuate daily and vary by location and device. An agency that reports only on positions is hiding the absence of anything more meaningful.
Be wary of anyone who promises rankings. What a good agency can promise is the work, a clear plan and honest reporting. That's what builds results that last.
Simon PittsFounder & CEO, SayuAt a glance:
| Good sign | Red flag |
|---|---|
| A written plan for the first 90 days | "Trust us, it's proprietary" |
| Links earned through content and digital PR | Bulk links at a fixed price |
| Reports on enquiries, sales and traffic | Reports that are only rankings |
| You own your website, accounts and content | Access held back or "rented" |
| Honest timelines and no guarantees | Guaranteed number one rankings |
| A clear notice period | Long lock-ins with no review point |
Agency, Freelancer, or In-House: An Honest Assessment
There's no universally right answer here.
A freelancer can be excellent value if your needs are focused (say, technical SEO or content writing) and you're willing to manage the relationship yourself. The risk is capacity: a freelancer juggling multiple clients may not be able to respond quickly when something goes wrong.
In-house makes sense when SEO is central to your business model and you have enough volume of work to justify a full-time salary. It gives you control and institutional knowledge, but it also means covering holidays, training, and the breadth of skills a good campaign needs.
An agency suits businesses that need a range of capabilities (technical, content, and link building) without hiring a team. The trade-off is that you're one of several clients. A good agency manages that well; a mediocre one lets you drift. Our SEO case studies give a realistic picture of what agency-managed campaigns can achieve.
For many UK SMEs, a hybrid approach (agency for strategy and execution, with internal sign-off on content) tends to work well.
How Long Before You See Results
Six months is the honest minimum for most campaigns before meaningful organic traffic growth becomes visible. In the meantime, a good agency will show you deliverables and improving technical metrics well before then. But the nature of search means that changes made today often take weeks or months to be reflected in rankings and traffic.
For choosing an SEO agency, the first six months is also your best window for judging quality. By month three you should see a completed audit, implemented fixes, published content, and evidence of outreach. By month six you should see traffic trending upward and be able to attribute specific actions to specific improvements. If neither is happening, that's your answer.
Frequently Asked Questions
Is SEO worth it for a small UK business?
It depends on whether people are searching for what you sell. If there's meaningful search volume for your products or services, SEO builds an asset that compounds over time, unlike paid advertising, which stops the moment you stop paying. For businesses in competitive markets, it's usually worth it. For very niche B2B offerings with tiny search volume, it may not be.
How much should I expect to pay for SEO in the UK?
Price varies enormously based on scope, competition, and who's doing the work. As a worked example, our packages at Sayu run from £495 to £1,995 per month plus VAT, covering everything from foundational work for smaller sites up to full-authority campaigns. Local SEO is available separately at £295 per month plus VAT. These are our own prices.
What's the difference between local and national SEO?
Local SEO focuses on visibility within a specific geographic area, typically using your Google Business Profile, local landing pages, and location-based citations. National SEO targets broader keyword sets without geographic restriction. They often run alongside each other but require different tactics and are usually priced separately.
Can an SEO agency guarantee results?
No reputable agency guarantees specific rankings. What they can commit to is a clear process, transparent reporting, and targets tied to traffic and conversions. Any agency guaranteeing you a #1 position for specific terms is making a promise nobody can keep.
How do I know if an agency's links are legitimate?
Ask to see examples. Good links come from recognisable publications, relevant industry sites, or regional news outlets, with editorial context. Footer placements and sponsored lists are a red flag. If the examples they show look like a directory you've never heard of, they're not building the kind of authority that moves rankings.
We've been running SEO and AI search campaigns for UK businesses since 2005, and we're happy to give you a straightforward assessment of your current position with no obligation. Have a look at our packages or drop us a message. We'll tell you honestly whether SEO makes sense for you right now, and what it would take to make it work.
