Best SEO Agencies in Cardiff
Compare SEO agencies serving Cardiff and the wider Welsh market against real UK cost and timeline benchmarks.
Expertise
Industries
Dedicated, screened shortlists for every market, service, and industry.
How to choose an SEO agency in Cardiff
Match the agency to the size of your business rather than the size of their client roster. Ask directly who owns the account, not just who ran the pitch. And if you need Welsh-language content or bilingual SEO alongside English, confirm upfront whether the agency can genuinely deliver that or whether it would need to be outsourced, since not every Cardiff agency covers both languages in-house.
What SEO costs in Cardiff
Cardiff pricing sits within the standard UK band of roughly £500 to £20,000 or more a month, and most small and mid-sized Welsh businesses pay £1,000 to £2,500. As with other regional UK cities, Cardiff agencies typically price below London for comparable scope, London-based work commonly runs 20 to 50 percent higher. Anything under about £800 a month is unlikely to include genuine strategy work.
Agency directory you can trust
1
Browse by market or service
Use the galleries to find agencies proven in your market, service, or industry.
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Compare on real proof
Every profile shows verified services, expertise, languages, pricing signals, and screening status.
3
Book a call directly
No middleman, no lead forms. Book straight into the agency's calendar.
How agencies earn a listing
Listings aren't paid placements. Every agency passes four checks before appearing, and stays only if it keeps passing them.
Proven search results
We verify real ranking performance in the agency's own market before listing.
Verified services
Services, industries, and languages are checked against the agency's actual work.
AI search expertise
Agencies must demonstrate working GEO/AEO capability, not just claim it.
Ongoing review
Listings are re-reviewed continuously and removed if quality standards slip.
Got questions about the directory? Start here
How much does SEO cost in Cardiff?
Across the UK, SEO retainers span roughly £500 to £20,000 or more a month, and most small to mid-sized Cardiff businesses pay between £1,000 and £2,500. Growing businesses often move into the £2,500 to £5,000 range. Quotes under roughly £800 a month tend to be templated rather than tailored.
How long does SEO take to show results in Cardiff?
Expect early, measurable movement around 3 to 4 months, with meaningful traffic and ranking gains typically taking 6 to 12 months. Local SEO can show results faster, within 60 to 90 days. New websites should plan for 12 to 18 months before SEO reliably drives leads.
Do I need a Cardiff agency that offers Welsh-language SEO?
Only if your customers search in Welsh, which is common for public sector, education and community-facing organisations in Wales but less so for many commercial businesses. If bilingual content matters to you, ask upfront whether the agency has in-house Welsh-language capability or would need to bring in a translator, since the two approaches produce very different quality and cost.
Is SEO being phased out by AI search?
No. Organic listings still account for the large majority of search clicks, and the technical and authority-building work behind strong rankings is exactly what makes a brand citable in AI-generated answers too. What's changed is measurement, buyers increasingly also check whether AI tools name their brand for relevant queries, so it's a fair question to put to any Cardiff agency you're considering.
How are the agencies on this page ordered?
Agencies are ordered by partner tier: Certified Partner first, then Partner, then Unverified. Tier reflects an agency's verification status with AIclicks, not a performance score or a ranking of quality. Unverified profiles were compiled from public search results and have not been claimed by the agency yet, so their details are deliberately minimal. Any agency can claim its profile to correct and expand it.
