Find the best SEO agencies in Cardiff. Compare top-rated SEO companies and choose the right partner for your business.
Cardiff, United Kingdom
Based in Cardiff, Wales, Nocturnal Lab is a small digital design agency working with start-up businesses and established organisations seeking to ref…
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Based in Cardiff, Peak Online works with businesses across the United Kingdom, offering custom web development alongside digital marketing support. F…
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Cardiff, United Kingdom
Based in Cardiff, Pinnacle Internet Marketing has operated in the digital marketing space since 2006, working with businesses across the UK regardles…
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Cardiff, United Kingdom
Based in Cardiff, Wales, Pixafusion Marketing Agency works as a full-service marketing partner for businesses across sectors including recruitment, r…
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Cardiff, United Kingdom
Based in Dunleavy House, Cardiff, PXA Marketing Limited is a small digital agency (team of 1-10) offering web development, creative design and data-d…
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Cardiff, United Kingdom
Based in Cardiff, Wales, this small digital marketing agency describes itself as a boutique operation working with a select number of clients rather…
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Cardiff, United Kingdom
Managed by Damian Burgess, Red Squirrel Marketing is a small Welsh agency serving clients across Cardiff, Swansea, Aberystwyth, Newport and extending…
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Cardiff, United Kingdom
Based in Cardiff, this SEO agency works with businesses across South Wales while also serving clients located throughout the UK. It operates as a sma…
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Cardiff, United Kingdom
Based in Clockwise Offices, Brunel House on Fitzalan Road, Cardiff, Station Rd Marketing is a small team of ten or fewer people offering strategic ma…
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Cardiff, United Kingdom
A small design and digital marketing team based in Cardiff, Wales, The Cardiff Graphic Designer works with businesses seeking website design, brandin…
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Cardiff, United Kingdom
Based in Cardiff, Wales, The Web Design Studios is a small team working with businesses that need a website built around a product or service they wa…
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Cardiff, United Kingdom
Based in Cardiff, Trades Grow works with tradespeople across the UK, including plumbers, heating engineers, roofers, driveway installers and landscap…
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Cardiff, United Kingdom
Based in Cardiff, True SEO is a UK SEO consultancy that positions itself around billing on agreed KPIs rather than billable hours, offering free 30-m…
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Cardiff, United Kingdom
Based in Cardiff, Ubiquity works with brands across Wales and the wider UK, ranging from start-ups to more established businesses. The agency positio…
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Cardiff, United Kingdom
Based in Cardiff, Walsh & Partners is an SEO agency serving businesses across South Wales and beyond, working with organic and local search clients w…
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Cardiff, United Kingdom
Based in Cardiff and trading since 2010, Webjects is a small studio (team of 1-10) working across Wales and the wider UK. Clients span the private an…
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The complete migration playbook: what to freeze before launch, how to build a redirect map that actually holds, what to test on the staging site, and how to read the first eight weeks after go-live.
2026-08-02 · 12 min read
How B2B search really works: bottom-of-funnel pages before blog volume, comparison and alternatives content, product-led assets, and attribution that survives a six-month cycle.
2026-08-02 · 11 min read
When template-generated pages work, when they get ignored, and how to build a programmatic set that survives quality updates: real data, real demand, real internal linking.
2026-08-02 · 11 min read
36 agencies are listed in Cardiff, 1% of the 3,907 recorded in United Kingdom — the country's 11th city by agency count. 36 publish a direct contact.
In Cardiff: SEO (100%), Web Design (67%), Social Media (44%), SEA/PPC (42%), Web Development (42%). An agency that ticks every box is rarely good at all of them: look at what it puts first.
Proximity genuinely matters in two cases: local SEO — Google Business profile, reviews, "near me" queries — and needing to meet in person. For an e-commerce or SaaS site targeting the whole country, an agency in Cardiff holds no structural advantage over one elsewhere in United Kingdom. The useful criterion stays experience with your type of site.
| Team size | Cardiff | Typically |
|---|---|---|
| 1-10 | 32 (89%) | Solo consultant or small studio. Direct access, limited capacity. |
| 11-50 | 4 (11%) | Separate roles: technical, content, link building. |
The 36 agencies on this page are ordered by how complete their listing is, never by payment: no position is for sale here. The information is collected from each agency's own website, checked as live. An agency can claim its listing to correct it, complete it, or connect its Search Console data.
What does SEO cost in Cardiff? Stated engagement floors here start at $1,000+. That figure says what size of engagement the agency takes on, not what yours will cost: the quote depends on the state of the site, the competition and the volume of content to produce.
Small local agency or large firm? 89% of agencies in Cardiff have fewer than ten people. At that size you talk directly to whoever does the work — the main advantage, and the main limit the day the engagement grows.
How do you check an agency before signing? Ask for a measured case on a site comparable to yours, with before and after figures. Check who will actually do the work. And get it in writing what stays yours when the contract ends: content, access, accounts.
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