Table of contents
How we vet every listicle
Every agency featured on Web Tonic passes our 84-point editorial review before a single listicle goes live. This is how we vet each pick:
Verified client outcomes: We require real case studies with measurable KPIs — revenue, ROAS, CPA, retention — tied to the exact category being ranked. No cherry-picked wins, no unverifiable numbers.
Independent reputation: We cross-check Clutch, Google, G2, and Trustpilot ratings, and screen for review-bombing or suspicious patterns. Only operators with a consistent, verifiable track record make the cut.
Beyond that, every listing goes through a quarterly re-audit. We check 84 criteria across 6 pillars to make sure it still holds up — here are some of the checks we run:
A web design and UI/UX agency plans and builds a company's website: it studies how visitors behave, maps pages and user journeys, designs the interface, builds it on a CMS such as WordPress, and keeps it fast, secure and updated once the site is live.
We kept only firms whose own site sells web design or development, then checked each address, client claim and price by hand. Fourteen of the sixteen are Cardiff-based; Do Digital Agency works from Taff's Well and Web Adept UK is headquartered in Pembrokeshire. Seven name a client we verified.
What does a web design and UI/UX agency in Cardiff actually do?
It researches, designs and builds websites: user research and wireframes, interface design, the CMS or ecommerce build, testing, launch and aftercare. Sixteen external firms serving Cardiff cleared our checks; fourteen are based in the city and eight are design-led studios.
1. Web Tonic
About: Web Tonic designs and builds websites as sales tools rather than brochures: UX research, wireframes and Webflow, Shopify or WordPress builds are planned around the enquiries and orders a site has to produce, with tracking in place before launch. Web development, performance creative and growth marketing sit with one team, and every domain, CMS and analytics account stays registered to the client.
Key Services: Growth Marketing, Paid Social, PPC, Meta Ads, SEO, Google Ads, Snapchat Ads, Amazon Ads, Reddit Ads, TikTok Ads, TikTok Shop, GEO-AEO, Webflow Design, Shopify Design, WordPress Design, UGC, Social Media Management, Pay Per Click Management, Marketing Analytics, Analytics Implementation & CDPs, Performance Branding, Performance 360° Audit, Programmatic Ads, OOH Ads, HR Marketing
Industries Served: eCommerce, SaaS, B2B, Construction Professionals, Home Services, SMEs, Health Spa & Wellness, Retail, Legal & Judicial Services, Food & Beverages, Pets, Fitness, Family & Children, Finance & Insurance, Travel, Non-Profits & Organizations, Furniture & Decoration
Notable Clients: WorldRemit, Jack & Jones, Ardene, L’Oréal, Sendwave, Nestlé, Airbnb. Serve Fortune 500 companies and smaller fast-paced startups.
Locations: HQ in San Francisco with notable offices in New York, Chicago, Miami, Toronto, Montreal, Dubai, Singapore, Sydney and more. Offices on five continents.
Pricing: Starting at USD $3,000 per month. Flexible and scalable plans at any time according to your enterprise needs. Book a call to learn more.
Great For: Mid-market to enterprise-level businesses requiring ongoing, on-tap growth and performance marketing services.
Website: Web Tonic
2. Pxa Marketing
About: Pxa Marketing is a digital and creative design agency based in Cardiff that builds high-performance websites and digital solutions. Their creative design practice merges brand identity with user psychology to deliver intuitive UI/UX design, custom web development, and integrated digital marketing.
Key Services: Web Design, UI/UX Design, Web Development, WordPress Development, WooCommerce Development, Laravel Websites, Mobile App Development, Brand Strategy, Digital Marketing, SEO
Industries Served: Not stated on the firm's own site
Notable Clients: Payrollly, Concept Eye Clinic, SwitchAdvisor, Recruitment Agency Expo
Locations: Cardiff
Pricing: Quote-based
Great For: Teams buying web design, Teams buying UI/UX design, Teams buying web development
Website: Pxa Marketing
3. Martin Hopkins Design Agency
About: Martin Hopkins Design Agency is a strategic brand, design, and digital agency based in Cardiff. They specialize in creating seamless digital experiences, website design, UI/UX design, and brand identity solutions for businesses across the UK.
Key Services: Web Design, UI/UX Design, Brand Strategy, Brand Identity Design, E-Commerce Solutions, Digital Strategy, Analytics & Optimisation (SEO)
Industries Served: Property, Professional Services, Public Sector, E-Commerce, Hospitality
Notable Clients: NHS Wales, Knight Frank, Swansea University
Locations: Cardiff
Pricing: Quote-based
Great For: Property businesses, Professional Services businesses, Public Sector organisations
Website: Martin Hopkins Design Agency
4. The Web Designer Cardiff
About: The Web Designer Cardiff builds bespoke websites tailored to individual business briefs, avoiding templates to establish a distinct visual identity. In addition to design and development, the agency handles domain registration, hosting, security setup, logo design, and search advertising.
Key Services: Web Design, Website Development, Hosting & Security Setup, Logo Design, Search Engine Optimisation (SEO), Pay-Per-Click Advertising
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Cardiff
Pricing: Quote-based
Great For: Teams buying web design, Teams buying website development, Teams buying hosting & security setup
Website: The Web Designer Cardiff
5. Infinity Digital Agency
About: Infinity Digital Agency is a design and marketing agency based in Cardiff that works with global clients to grow businesses. They specialize in a full suite of services ranging from branding, website design, and UI/UX design to SEO and social media content.
Key Services: Website Design, UI/UX Design, Web Development, Mobile App Development, Branding, SEO, Social Media Management, Copywriting, Conversion Rate Optimisation
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Cardiff (no street address published)
Pricing: Quote-based
Great For: Teams buying website design, Teams buying UI/UX design, Teams buying web development
Website: Infinity Digital Agency
6. Webspection
About: Webspection is a Cardiff-based digital and SEO agency that provides custom website design built from scratch without page builders. They also offer organic SEO, Google Ads, WordPress specialization, and ongoing website management and support.
Key Services: Custom Website Design, WordPress Development, Organic SEO (Local & National), Google Ads (PPC), Online Reputation Management (ORM), Consulting, Hosting & Support
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Cardiff
Pricing: Quote-based
Great For: Teams buying custom website design, Teams buying WordPress development, Teams buying organic SEO (local & national)
Website: Webspection
7. Do Digital Agency
About: Do Digital Agency is a creative and 3D digital agency based in Taff's Well, just north of Cardiff providing integrated services including web design, UI/UX design, motion, and interactive experiences. They work with various clients across the UK such as property developers, architects, and design agencies.
Key Services: Web Design, UI/UX Design, Digital & Web Design, eCommerce Design, Brand & Identity Design, 3D Visualisation, Motion, Interactive
Industries Served: Property, Architecture, Manufacturing, Design and Build, Marketing & Design Agencies
Notable Clients: No client publicly named on the firm's own site
Locations: Taff's Well, just north of Cardiff (CF15)
Pricing: Quote-based
Great For: Property businesses, Architecture businesses, Manufacturing businesses
Website: Do Digital Agency
8. Illustrate Digital
About: Illustrate Digital is a Cardiff-based UX and WordPress agency dedicated to improving digital experiences. They focus on specialized user experience design, full-build web design projects, platform migrations, and ongoing maintenance.
Key Services: UX Strategy, User Research, User Experience Design, WordPress Development, WordPress Maintenance, Web Design
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Cardiff (Brunel House, Fitzalan Road), Bristol (Finzels Reach)
Pricing: Quote-based
Great For: Teams buying UX strategy, Teams buying user research, Teams buying user experience design
Website: Illustrate Digital
9. Web Adept UK
About: Web Adept UK is a digital agency offering a dedicated Cardiff office that provides website design, SEO, PPC, and social media management to local and national organisations. It also lists offices in Pembrokeshire, Hereford and Wandsworth.
Key Services: Web Design, Digital Marketing, SEO, Pay-Per-Click, Social Media Management, Branding
Industries Served: Not stated on the firm's own site
Notable Clients: RDH Transport
Locations: Pembrokeshire, Cardiff office, Hereford, Wandsworth, London
Pricing: Quote-based
Great For: Teams buying web design, Teams buying digital marketing, Teams buying SEO
Website: Web Adept UK
10. Design Tribe
About: Design Tribe is an independent brand and digital design consultancy headquartered in Cardiff that specializes in strategic branding and WordPress website design and development. They work with purpose-driven organizations across sectors including energy and renewables, life sciences, charities, and the public sector.
Key Services: Web Design, Web Development, WordPress Website Development, Branding, Graphic Design, WordPress Website Hosting
Industries Served: Charities & Non-profit, Energy & Renewables, Life Sciences, Public Sector, Education
Notable Clients: No client publicly named on the firm's own site
Locations: Cardiff
Pricing: Most engagements GBP £3,000 to £20,000+
Great For: Charities and non-profits, Energy and renewables firms, Life sciences firms
Website: Design Tribe
11. Karolo Design
About: Karolo Design is an ambitious brand and web design agency based in Cardiff. They specialize in custom website design, user experience (UX) structuring, and comprehensive visual identity solutions for businesses and organizations.
Key Services: Website Design, UI/UX Design, Branding, E-Commerce Development, Printed Literature
Industries Served: Non-Profit, Public Sector, Education, Healthcare, Asset Management
Notable Clients: Cardiff Capital Region, Cardiff University, Cyber Innovation Hub
Locations: Cardiff
Pricing: Quote-based
Great For: Non-profit organisations, Public Sector organisations, Education organisations
Website: Karolo Design
12. New Media Ghost
About: New Media Ghost is a digital marketing and web development agency based in Cardiff that focuses on search visibility, strategic messaging, and custom website creation. Their work includes building websites designed to explain services properly, convert visitors, and ensure search engines interpret them correctly.
Key Services: Website Development, Digital Strategy, Content Marketing, Search Engine Optimization, Social Media Marketing
Industries Served: Not stated on the firm's own site
Notable Clients: No client publicly named on the firm's own site
Locations: Cardiff
Pricing: Quote-based
Great For: Teams buying website development, Teams buying digital strategy, Teams buying content marketing
Website: New Media Ghost
13. Station Rd Marketing
About: Station Rd Marketing is a strategic marketing and digital agency located at Brunel House in Cardiff. Their core capabilities encompass web design & UX, conversion rate optimization (CRO), search, performance, and PR & communications. They focus on aligning business goals with tailored digital strategies to drive sustainable growth.
Key Services: Web Design & UX, Creative, CRO, HubSpot, Shopify & Wordpress, Content & PR, Email, Paid Social, SEO, Paid Search
Industries Served: Not stated on the firm's own site
Notable Clients: Titania, Coles Funeral Directors, Seven Bro7hers Brewery, Llanishen High School
Locations: Cardiff
Pricing: Quote-based
Great For: Teams buying web design & UX, Teams buying creative, Teams buying cro
Website: Station Rd Marketing
14. Caffeine Marketing
About: Caffeine Marketing is a digital marketing agency founded in Cardiff that provides integrated online strategies, including web design and development. They design and build search-ready, conversion-focused websites structured to scale alongside business growth.
Key Services: Web Design, Website Development, SEO, PPC, Social Media Marketing, Content Marketing, Branding
Industries Served: Professional Services, Healthcare, Retail, Technology, E-commerce
Notable Clients: No client publicly named on the firm's own site
Locations: Cardiff
Pricing: Quote-based
Great For: Professional Services businesses, Healthcare organisations, Retail businesses
Website: Caffeine Marketing
15. Toward
About: Toward is a strategic branding and web design agency based in Cardiff, United Kingdom. They build transformational websites, ecommerce stores, and digital experiences centered around user experience and brand growth.
Key Services: Web Design, UI/UX Design, Digital Strategy, Brand Identity Development, Bespoke Web Development, Ecommerce, Digital Marketing
Industries Served: Hospitality, Sport, Retail & Ecommerce, Tech, Housing, Creative & Media, Non Profit
Notable Clients: Cardiff City FC, Brains, The Parkgate Hotel, ICC Wales, Character.com
Locations: Cardiff
Pricing: Quote-based
Great For: Hospitality businesses, Sport organisations, Retail & Ecommerce businesses
Website: Toward
16. PNB Web Design
About: PNB Web Design is a web design and development agency based in Cardiff and Brackley that delivers responsive, custom-coded and content-managed websites. They operate as a digital team providing complementary services like SEO, branding, and copy writing.
Key Services: Web Design, Web Development, SEO, Branding, Content Creation, Logo Design, Web Hosting
Industries Served: Not stated on the firm's own site
Notable Clients: Daniel Edmeades Photography, Cynefin Therapy, The Physiotherapy Hub, Motion Balearics
Locations: Cardiff (Sophia House, Cathedral Road), Brackley, Northamptonshire
Pricing: Quote-based
Great For: Teams buying web design, Teams buying web development, Teams buying SEO
Website: PNB Web Design
17. Marketing Purks
About: Marketing Purks is a dedicated marketing and web development agency located in Cardiff, Wales. They offer bespoke solutions spanning strategic marketing campaigns, creative design, and web development to help businesses grow.
Key Services: Web Development, Design & Creative, Digital Marketing, Branding, Social Media Management, SEO
Industries Served: Trades, Hospitality, Charity / Third Sector
Notable Clients: No client publicly named on the firm's own site
Locations: Cardiff
Pricing: Quote-based
Great For: Trades businesses, Hospitality businesses, Charity and third-sector organisations
Website: Marketing Purks
Quick Comparison Table
| Agency | Key Specialty | Starting Price | Best For |
|---|---|---|---|
| 1. Web Tonic | Full-Service Performance Marketing | USD $3,000/mo | Mid-market to Enterprise |
| 2. Pxa Marketing | Web Design | Quote-based | Small and mid-sized businesses |
| 3. Martin Hopkins Design Agency | Web Design | Quote-based | Property businesses |
| 4. The Web Designer Cardiff | Web Design | Quote-based | Small and mid-sized businesses |
| 5. Infinity Digital Agency | Website Design | Quote-based | Small and mid-sized businesses |
| 6. Webspection | Custom Website Design | Quote-based | Small and mid-sized businesses |
| 7. Do Digital Agency | Web Design | Quote-based | Property businesses |
| 8. Illustrate Digital | UX Strategy | Quote-based | Small and mid-sized businesses |
| 9. Web Adept UK | Web Design | Quote-based | Small and mid-sized businesses |
| 10. Design Tribe | Web Design | Most engagements GBP £3,000 to £20,000+ | Charities and non-profits |
| 11. Karolo Design | Website Design | Quote-based | Non-profit organisations |
| 12. New Media Ghost | Website Development | Quote-based | Small and mid-sized businesses |
| 13. Station Rd Marketing | Web Design & UX | Quote-based | Small and mid-sized businesses |
| 14. Caffeine Marketing | Web Design | Quote-based | Professional Services businesses |
| 15. Toward | Web Design | Quote-based | Hospitality businesses |
| 16. PNB Web Design | Web Design | Quote-based | Small and mid-sized businesses |
| 17. Marketing Purks | Web Development | Quote-based | Trades businesses |
Frequently Asked Questions
How should I choose between these Cardiff web design agencies?
Start with live work and process. A good Cardiff web design agency shows sites it built that are still online, explains how discovery, wireframes and user testing happen before visual design, and says which CMS it recommends and why. Ask who owns the domain, hosting and design files after launch, and what ongoing support costs. Toward, Karolo Design and Illustrate Digital lead with design, UX and build, while Station Rd Marketing, Caffeine Marketing and Webspection sell sites beside search and campaigns.
What does a website cost from a Cardiff agency?
One of the sixteen external firms publishes a figure: Design Tribe says most of its engagements range from GBP £3,000 to more than £20,000. Webspection prints prices for SEO but quotes websites to scope, and every other firm quotes after a call. Ask whether the price covers discovery, content, photography, hosting and training, and what a month of support costs after launch. A fixed price against a written scope is easier to hold an agency to than a day rate.
What is the difference between web design, UI/UX and web development?
Web design covers how a site looks and how people move through it; UI/UX work goes deeper into user research, journeys and testing; web development is the build, integrations and speed. Do Digital Agency adds 3D and motion work, Martin Hopkins Design Agency leads with brand identity, and New Media Ghost focuses on messaging and search visibility. A proposal should still price discovery, design, build, content and aftercare as separate lines, so you can compare two Cardiff quotes like for like.
How long does a new website take, and when will it show results?
A small brochure site usually takes four to eight weeks from signed brief to launch; a bespoke build with UX research, custom features or ecommerce often takes three to six months. A small Cardiff business with its copy ready can launch far sooner than a university or public body with several sign-off stages. More enquiries or sales only show once the site has traffic and working analytics, so agree before launch how success will be measured and who fixes problems in the first month.
Should I hire a Cardiff agency or one based elsewhere?
Cardiff has a strong local bench: fourteen firms here work from the city, from Brunel House on Fitzalan Road, shared by Illustrate Digital and Station Rd Marketing, to The Maltings, Cathedral Road, Mount Stuart Square, Capital Tower and Dunleavy Drive. Do Digital Agency sits just north in Taff's Well, and Web Adept UK runs a Cardiff office alongside Pembrokeshire, Hereford and Wandsworth. Local meetings help during discovery, but ownership and support terms matter more.
Choosing a Web Design Agency in Cardiff
Fourteen of the sixteen external firms are based in Cardiff, and half the list are design-led studios, so decide first whether you want a pure build partner or one agency across web and marketing.
Seven name a client we could verify, and one publishes a price range. Ask each studio for two live sites in your sector and the results after launch. A single documented result tells you more than a long gallery of screenshots.
Ownership comes first. The domain, hosting, CMS logins and design files should sit in your business's name, with a written handover if you ever change agency. Ask for the support terms and response times in writing too.
Finally, meet the people who will design and build the site, and agree how often you will review work in progress. If you want the build, the creative and the traffic plan answerable to one team, read our latest analysis or see how we work in Cardiff.
