Web design & SEO agency

Websites that
actually perform.

We design and build high-performance websites that help ambitious businesses grow.

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QuantWeb laptop showing the QW mark
No monthly retainersPay per job, no lock-in
South Wales basedServing the whole UK
98+ Lighthouse scoreOn every single build
Ongoing supportWe're with you for the long run.
Selected work
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High-performance web design

Designed to
deliver real results.

Beautiful websites, built for speed, SEO and real business growth. Every site we create is optimised to perform — because a great website should do more than just look good.

PerformanceGoogle Lighthouse — every build
What we do

From idea
to impact.

A streamlined process built around your goals — designed, built and optimised to rank.

01 — DESIGN

Design

Clean, on-brand and conversion-focused — designed around your goals, never a template.

02 — BUILD

Build

Hand-coded and lightning fast, mobile-first, with 98+ Lighthouse scores as standard.

03 — RANK

Rank

SEO foundations baked in from day one, so the right people actually find you.

Services

Everything you need
to grow online.

From high-converting websites to ongoing SEO support, we offer a complete solution to help your business succeed online.

Web Design & Development

High-performance websites built to convert.

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Ongoing Support

Website changes, updates and support when you need it.

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Website Audits

Find opportunities and uncover what's holding you back.

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QuantWeb performance dashboard on a phone
Speed. SEO. Results.

Performance
built in.

Every QuantWeb website is built with performance in mind — achieving 98+ Lighthouse scores as standard, with clean code, optimised assets and best-in-class SEO foundations.

98+Lighthouse score
100SEO score
100Best practices
100Accessibility
Why QuantWeb

Why businesses
choose us.

Performance, honesty and results — without the agency bloat or lock-in contracts.

Built for performance

Hand-coded, not page-builder bloat — 98+ Lighthouse on every build.

No monthly retainers

Pay per project, no lock-in. You own everything we build.

SEO from day one

Design, code and content aligned to rank from launch — not bolted on later.

Local & personal

South Wales based — you deal directly with the person building your site.

South Wales roots. UK wide reach.

Proudly based
in South Wales.

We work with businesses in Cardiff, Swansea, Newport, Bridgend and across the UK, helping them grow with effective, results-driven websites.

UK map highlighting QuantWeb's South Wales base and UK-wide reach
Based in South Wales
Working across the UK
FAQ

Questions,
answered.

The things businesses most often ask before starting a project with us.

How much does a website cost?

A professional business website typically costs between £350 and £8,000 depending on complexity. At QuantWeb, pricing starts from £350 for a clean, fast, fully optimised site — with no monthly retainers.

How long does SEO take to work?

Local SEO can show movement within 6–8 weeks. Competitive UK-wide rankings typically take 3–6 months. We focus on quick local wins first, then build long-term authority.

Do you work with businesses outside South Wales?

Yes — while based in South Wales, we work with businesses across the UK. All project work runs remotely with regular calls and clear communication throughout.

What makes QuantWeb different?

We combine web design and SEO under one roof, and hand-code every site for performance — 98+ Lighthouse as standard. You deal directly with the person building your site, with no lock-in.

Let's build something great

Ready to grow your business?

Drop your email and we'll be in touch within one business day with a clear plan and quote.

Prefer email? admin@quantweb.co.uk