Most businesses find an SEO agency by asking one person for a recommendation, taking two calls and picking whoever was most convincing on the second. That produces a reasonable outcome about half the time. The process below takes roughly two weeks of intermittent effort, costs nothing, and removes most of the ways this goes wrong. It is deliberately boring, because the failure mode here is being persuaded rather than being misinformed.
Week one, part one: write down what you are buying
Local visibility, organic visibility with no geographic component, a technical problem, content production, or recovery from something that went wrong. These are different services and different suppliers. Write one paragraph saying which, what would count as success in twelve months, and what you can spend a month. Everything after this is easier, and agencies will tell you that a clear brief is rare enough to be memorable.
Week one, part two: build a list of eight from three sources
Ask two or three businesses like yours who they use and whether they would again. Look at who ranks for terms in your category, noting that the agency ranking for SEO terms is selling to other agencies rather than to you. And look at the suppliers your competitors credit or link to. Eight is enough; twenty is a way of avoiding the decision.
Week two: send the same short brief to all eight
The same paragraph, the same four questions, the same deadline. Proposals are designed to be incomparable, and a common format removes that advantage. The four questions: who does the work and for how many hours a month; which of our competitors have you worked with and what happened; what do we own at the end, specifically the site, the profile, the ad accounts and the content; and does any proposed link acquisition involve payment of any kind.
Check the two things that are checkable
Ask for two current clients you may contact, and contact them, asking what the reporting is like and what happened when something went wrong. Then read the agency's own site: whether it ranks, whether it converts, whether it publishes anything specific. Neither check is conclusive and both are cheap, and together they remove more bad outcomes than any amount of proposal reading.
Buy a small first piece of work, not a twelve month term
A three month engagement with a defined set of deliverables tells you more than any pitch: whether they do what they said, on time, and whether the reporting is honest about what did not work. Long minimum terms at the start transfer all the risk to you before either side knows how it will go, and they are usually negotiable if you ask.
Questions people ask about find SEO agency
Where should I look for an SEO agency?
Referrals from businesses like yours, the suppliers your competitors visibly use, and directories that state their methodology. Treat rankings for SEO-related terms with care: an agency that ranks for those is selling to an audience of marketers, which is a different competence from ranking a plumbing company or a software product.
How many agencies should I talk to?
Three or four properly, drawn from a longer list filtered on paper. More than that and the process becomes about managing conversations rather than choosing, and the last one you speak to gains an advantage it has not earned.
What is the biggest red flag?
A guarantee of rankings, which nobody can make honestly, followed closely by vagueness about who does the work and reluctance to say what happens to your accounts and content when the contract ends. The second two are more common and more expensive than the first.
Should I use an RFP?
A one-page brief with four questions, yes. A formal multi-page RFP usually selects for agencies with staff to answer RFPs rather than agencies that would do the work well, and the best small suppliers often decline to respond at all.