Best SEO Agencies, by City and Region
We reviewed SEO agencies by location and ranked them on specialisation, published review scores and evidence of real client work. Pick your city to see the list, what each agency is best for, and an honest note on where each one is not the right fit.
162 agencies across 27 regions. Reviewed by Davis Paipa, Founder, Shoptank. Verified 2026-09-17.
What is Search Engine Optimization (SEO)?
Search Engine Optimization (SEO) is the practice of improving how a site ranks in search results. An SEO agency handles the technical health of the site, the content that answers buyer questions, and the third-party links and mentions that build authority. Most now add AI search visibility to that scope.
Browse by location
North America
Europe
How we rank agencies
- Depth of SEO experience, not general marketing
- Third-party review score on Clutch, GoodFirms or G2 where published
- Named services and a clear, public description of the offer
- Company longevity and team size
- Fit for enterprise versus small and mid-size brands
- Pricing transparency
- Evidence of real, named client work
Every agency listed is real and operating. Ratings and services come from the agency website or a third-party review platform, verified 2026-09-17. Where a figure is not published, the page says so rather than estimating.
Know your numbers before you hire
Shoptank shows whether ChatGPT, Claude and Perplexity name your brand today, which sources they cite, and who gets recommended instead. Run it first, then brief the agency with real data.
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