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Guides16 October 2026

How to choose an SEO agency

SEO is hard to judge from the outside, which is why the bad end of the market survives. The fastest way to choose well is to know the red flags. Here they are, with the questions to ask.

By Henry Guest, founder, russle

Frequently asked questions

Are guaranteed rankings ever real?

No. Nobody controls Google, so nobody can guarantee a position. A guarantee is either meaningless small print or a sign the work will be the kind that risks your site rather than helps it.

How long should I lock in for?

SEO needs a few months to show, so a short minimum term is reasonable. A long lock-in with no clear reporting is not; it protects the agency, not you. Look for a rolling arrangement after an initial period.

What is the single best question to ask?

What exactly will you change on my site in the first month. A specific answer signals real work. Vague talk of optimisation and authority signals the opposite.

Henry Guest

Written by

Henry Guest, founder, russle

Henry Guest is the founder of russle, a web design, ecommerce and SEO studio working with ambitious businesses across the UK. He writes about building sites, stores and platforms that actually bring in work.

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