Choosing an SEO agency in Cardiff means filtering out the many firms that target the city with a landing page while working from Bristol, Swansea or further away. Every agency in this guide publishes a Cardiff office address on its own website and offers SEO as a named, core service.
The 10 below range from long-established agencies in Llanishen and Ty Glas to SEO-only teams in Cardiff Bay. Each entry covers the office, the sectors the agency serves and the clients it publishes.
Cardiff SEO Agencies: Office, Founding Year and Focus for All 10
| # | Agency | Cardiff office | Founded | Known for |
|---|---|---|---|---|
| 1 | Liberty Marketing | Purbeck House, Lambourne Crescent, Llanishen, CF14 5GJ | 2008 | Hospitality, food and retail brands |
| 2 | Pinnacle Internet Marketing | 25-27 Pantbach Road, CF14 1TU | 2006 | Small and mid-sized local businesses |
| 3 | Caffeine Marketing | 3rd Floor, Capital Tower, Greyfriars Road, CF10 3AG | 2011 | Estate agents, e-commerce, professional services, healthcare |
| 4 | Fratelli Agency | 12 Cwrt Y Parc, Ty Glas, CF14 5GH | 2019 | E-commerce brands |
| 5 | omniSEO | 113-116 Bute Street, CF10 5EQ | 2017 | E-commerce platforms and local businesses |
| 6 | Lumen SEO | Space2B, The Maltings, East Tyndall Street, CF24 5EA | 2020 | Small businesses, B2B and B2C |
| 7 | Appear Online | Unit 7, Stadium Close, CF11 8TS | Incorporated 2023 | E-commerce, construction, dental, architects, solicitors |
| 8 | PXA Marketing | Dunleavy House, Dunleavy Drive, CF11 0SN | Incorporated 2024 (formerly Pixafusion) | Healthcare, hospitality, professional services, recruitment |
| 9 | DAX Studio | Unit 4, Boomerang Parc, CF24 5EW | Incorporated 2024 | Architects, property, construction, clinics, hospitality |
| 10 | Ascend | Clockwise, Brunel House, 2 Fitzalan Road, CF24 0EB | Incorporated 2022 | Local services to national e-commerce |
Top 10 SEO Agencies in Cardiff
1. Liberty Marketing: National Brands From a Llanishen Base
Cardiff office: Purbeck House, Lambourne Crescent, Llanishen, CF14 5GJ Known for: Hospitality, food and retail brands Services: Technical, local and international SEO, AI SEO, site migrations, paid media, digital PR, content, training
Liberty Marketing was founded in Cardiff in 2008 and works from Llanishen. Its SEO services run from technical and international SEO to AI search and site migrations, backed by digital PR and paid media teams.
Its case studies lean towards hospitality and retail: Pizza Express, San Carlo and Crew Clothing all appear on its site. It also runs SEO training and consultancy, useful for brands building an in-house team.
2. Pinnacle Internet Marketing: Daily Tracking Through Its Own Dashboard
Cardiff office: 25-27 Pantbach Road, CF14 1TU Known for: Small and mid-sized local businesses Services: SEO, AI search optimisation, PPC, web design, social media, LinkedIn marketing
Pinnacle Internet Marketing has been based on Pantbach Road since 2006, with 10 named staff led by managing director Howard Wilkins. Its SEO service now covers AI search optimisation as well as classic rankings.
Every client is enrolled on Web Fingerprints, Pinnacle’s own online monitoring tool, so performance can be checked daily rather than waiting for a monthly report. The agency also offers a free web audit.
3. Caffeine Marketing: A City-Centre Google Partner Since 2011
Cardiff office: 3rd Floor, Capital Tower, Greyfriars Road, CF10 3AG Known for: Estate agents, e-commerce, professional services, healthcare Services: SEO, PPC, social media, content, website design
Caffeine Marketing was founded in Cardiff in 2011 and works from Capital Tower in the city centre. It shows a Google Partner badge and describes itself as an approved Google Ads and LinkedIn marketing partner.
The agency says it has worked across more than 60 sectors, naming estate agents, e-commerce brands, professional services and healthcare providers on its homepage. Its SEO service sits alongside PPC, content and social, so it suits businesses wanting one supplier.
4. Fratelli Agency: E-commerce Growth From Ty Glas
Cardiff office: 12 Cwrt Y Parc, Ty Glas, CF14 5GH Known for: E-commerce brands Services: SEO, paid search, paid social, content marketing, web design
Fratelli, set up in 2019, focuses on e-commerce and says it has worked with more than 100 online brands. Its SEO service is paired with paid search and paid social, the usual mix for online retailers.
Projects on its site include Balance Activ, Flowerbe and True Decadence. Its homepage also runs a “30 Days to Grow Challenge” offer for brands that want to test the relationship first.
5. omniSEO: An SEO-Only Team With a Ranking Guarantee
Cardiff office: 113-116 Bute Street, CF10 5EQ Known for: E-commerce platforms and local businesses Services: Local SEO, technical SEO, e-commerce SEO, link building, white-label SEO, Google Ads
omniSEO has worked from Bute Street in Cardiff Bay since 2017 and focuses almost entirely on search. It is the only agency here that offers a ranking guarantee, and it also guarantees the links it builds.
Its e-commerce SEO service has separate pages for Shopify, Magento, WordPress and BigCommerce stores, and the homepage shows case studies for Workbench and Spheric. A free five-minute video audit is the usual starting point.
6. Lumen SEO: SEO Coaching and a Free Video Audit
Cardiff office: Space2B, The Maltings, East Tyndall Street, CF24 5EA Known for: Small businesses, B2B and B2C Services: SEO, SEO for AI search, B2B SEO, B2C SEO, SEO coaching, workshops
Lumen SEO launched in 2020 and works from The Maltings near Cardiff Bay. Besides its SEO service, it offers SEO coaching and workshops, which suits small businesses that want to do some of the work themselves.
Case studies include Yolk Recruitment, Cheeky Wipes and Cwtch Haus. The team runs a flexible 32-hour working week, and the agency offers a free human-made SEO and AI search audit delivered on video.
7. Appear Online: Digital PR and SEO for South Wales
Cardiff office: Unit 7, Stadium Close, CF11 8TS Known for: E-commerce, construction, dental, architects, solicitors Services: SEO, e-commerce SEO, local SEO, digital PR, link building, Google Ads
Appear Online runs offices in Cardiff and Swansea and combines its SEO agency service with digital PR and link building. Sector pages cover e-commerce, construction, dental practices, architects and solicitors.
Case studies include No. 86 Estate Agents, Lost Loom and Anavrin. The agency offers a free website audit before any engagement.
8. PXA Marketing: Lead Generation for Healthcare and Services
Cardiff office: Dunleavy House, Dunleavy Drive, CF11 0SN Known for: Healthcare, hospitality, professional services, recruitment Services: SEO, PPC, social media, websites, creative, consultancy
PXA Marketing says its team has worked in Cardiff for around 15 years, previously as Pixafusion, before the current company was formed in 2024. It keeps dedicated sector pages for healthcare, hospitality, professional services and recruitment.
Its SEO page reports a 120% rise in organic leads in six months for SwitchAdvisor, and its client work includes JD Prestige and Concept Eye Clinic.
9. DAX Studio: SEO With No Lock-In for Design-Led Firms
Cardiff office: Unit 4, Boomerang Parc, CF24 5EW Known for: Architects, property, construction, clinics, hospitality Services: Websites, SEO, Google Ads, web apps, AI implementation
DAX Studio builds websites and runs SEO for architects, property and lettings firms, construction companies, clinics and premium hospitality. Its SEO page promises plain-English monthly reporting and says clients keep their own content, accounts and data, with no lock-in.
Work on its site includes Luso Architecture, where it handles design, SEO and maintenance, plus Dugard Group and Hanalex Jewellery.
10. Ascend: A Small Team for Local Service Firms
Cardiff office: Clockwise, Brunel House, 2 Fitzalan Road, CF24 0EB Known for: Local services to national e-commerce Services: SEO, branding, website development, website audits
Ascend describes itself as a small team working from the Clockwise space in Brunel House on Fitzalan Road. Its SEO service covers clients from local service providers through to national e-commerce brands.
Projects include local SEO and technical work for James Douglas and ongoing SEO and link building for Sherpa Power. Website audits are also offered as a standalone service.
Best Cardiff SEO Agency for Your Business
- E-commerce: Fratelli (100+ online brands), omniSEO (Shopify, Magento and BigCommerce pages) and Appear Online.
- Hospitality and retail brands: Liberty Marketing, with Pizza Express, San Carlo and Crew Clothing case studies.
- Healthcare and professional services: PXA Marketing and Caffeine Marketing both name these sectors.
- Architects, property and construction: DAX Studio and Appear Online keep dedicated pages for them.
- Small businesses doing some SEO in-house: Lumen SEO offers coaching and workshops alongside its service.
What Every Cardiff Agency Here Had to Prove
Three checks decided the list. The agency’s own site had to show a Cardiff office address, not a city landing page. SEO had to be a named service with its own page. And the business had to be active, with recent work and, where it could be matched, a live Companies House record.
Firms based in Barry, Penarth, Caerphilly or Newport were left out, as were national chains with only a Cardiff sales page. Founding years come from each agency’s own site, or from Companies House where the site gives none.
How to Choose an SEO Agency in Cardiff
Shortlist agencies whose published clients look like your business, then compare how they work and report. These checks help:
- Check the sector fit. An agency with e-commerce case studies will plan very differently from one built around local trades.
- Ask how you will track progress. Pinnacle gives clients a daily dashboard; DAX Studio promises plain-English monthly reports.
- Read the contract terms. DAX Studio says clients keep their accounts and data with no lock-in, a fair question to put to any agency.
- Ask about AI search. Liberty, Pinnacle and Lumen SEO all list AI search optimisation.
- Start with an audit. Pinnacle, omniSEO, Lumen SEO and Appear Online all offer a free one.
Bring our list of questions to ask before hiring an SEO agency to the first call. If most of your customers are nearby, compare these firms with our guide to the best local SEO companies.
Frequently Asked Questions
Which Cardiff SEO agencies offer a free audit?
Pinnacle Internet Marketing, Appear Online and omniSEO all offer free audits, and Lumen SEO offers a free SEO and AI search audit delivered on video.
Is there an SEO agency in Cardiff that guarantees rankings?
omniSEO offers a ranking guarantee and also guarantees the links it builds. Treat any guarantee carefully and ask exactly which keywords and timescales it covers.
Do I need an agency based in Cardiff?
Not always, as SEO is mostly done remotely. A Cardiff office makes face-to-face meetings easy and often means better knowledge of the Welsh market, which is why every agency here has a local address.
Which Cardiff agencies specialise in e-commerce SEO?
Fratelli says it has worked with more than 100 online brands, omniSEO has platform pages for Shopify, Magento and BigCommerce, and Appear Online lists e-commerce SEO as a core service.
Sources and Further Reading
- Do You Need an SEO? Tips for Hiring an SEO (Google Search Central)
- SEO Starter Guide: The Basics (Google Search Central)
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