websites & apps

Website development company for high-performance sites & apps.

Fast, scalable sites, headless CMS builds and web apps that earn their keep. We've delivered 350+ projects since 2005, with senior specialists directing AI coding agents.

Key stats

2005

Established in Reading, UK

100+

Branded sites in one Funeral Partners rollout

350+

Projects shipped

60+

Five-star Google reviews

[ comparison ]

Code23 agentic delivery vs traditional agency

Feature
Code23
Typical agency
Delivery speed
5x ship speed
Design then wait
Senior access
Craft stays senior
Pitch then juniors
QA & security depth
Harden stage
Launch-week scan
Payment structure
50 / 30 / 20
50% deposit lock
Post-launch cover
90-day warranty + support tiers
Retainer upsell
AI transparency
Senior craft + agents
AI-slop unmarked
what we do

Capabilities

01

Corporate & marketing sites

Speed, clarity and editorial control on Astro, Next.js or WordPress - stack follows the job, not the fashion.

  • Corporate websites
  • Astro & Next.js
  • WordPress (20 years)
  • Performance-first
02

E-commerce

Catalogues, carts and checkout for real product complexity - WooCommerce and custom systems for regulated and industrial buyers.

  • WooCommerce
  • Custom catalogues
  • Checkout flows
  • Integrations
03

Mobile apps

Native or companion apps when a stretched website will not cut it - trade-offs scoped before screens get drawn.

  • iOS & Android
  • App companions
  • API-backed apps
  • Store release support
04

CMS development

Payload, WordPress and headless setups editors can run without raising a ticket for every line change.

  • Payload CMS
  • WordPress
  • Headless CMS
  • Editor training
05

Migrations & rebuilds

Leave a brittle stack without torching SEO - redirect maps, content models and a Harden pass on the way out.

  • CMS migrations
  • URL & redirect plans
  • Content modelling
  • SEO continuity
06

Performance & technical SEO

Core Web Vitals, crawl clarity and templates built to rank - wired into Blueprint and Harden, not bolted on later.

  • Core Web Vitals
  • Technical SEO
  • Schema & IA
  • Speed budgets
engagement

How we engage

01

Project

Fixed-scope project

Scoped after Blueprint. Milestone payments. 90-day warranty on the build.

Start a project
02

Phased

Phased delivery

Discovery first, then build phases with clear gates. Scope locked per phase.

Map a phase
03

Retainer

Support retainer

Managed hosting, monitoring and continuous improvement from the team that built it.

See support tiers
how we ship

Process

  1. 01

    Map

    Audiences, content owners, SEO needs and the journeys that must convert on day one.

  2. 02

    Blueprint

    IA, stack choice, CMS model and page templates locked into a fixed-scope quote.

  3. 03

    Build

    Senior specialists direct AI coding agents across templates, components and integrations, with review on every merge.

  4. 04

    Harden

    Accessibility, security scanning and performance budgets probed at machine depth.

  5. 05

    Launch

    Redirects, analytics, CMS training and a calm go-live - 90-day warranty on the build.

  6. 06

    Evolve

    Content growth, CRO tests and continuous development through Support & Growth when you want an ongoing team.

testimonials

What clients say

We worked with Code23 in the Autumn of 2021 as a potential website development partner for our new company website. We immediately felt confident that Code23 could deliver a fantastic quality product and that they knew exactly what to do to take our digital presence to the next level. Fast forward 3 months, and with zero delays to our project, and we're delighted with our newly launched website. The styling, functionality and overall build quality is exceptional, and in the eight years that I've worked with web agencies, this is by far the smoothest migration and launch that I've been involved with. I would highly recommend Code23 as a website development agency.

Sam Roberts 4 years ago

James and his team at Code23 have recently provided us with a brand new website with a responsive design that looks great on any device. Being based on the WordPress platform it's easy for us to manage the content ourselves, which allows us to keep the website fresh as new products and industry news arrives. There are lots of ways of getting websites built, but choosing Code23 turned out to be a great investment for us. James and his team are at the cutting-edge of web design and technologies, and after initial discussions they completed the build needing very little input from us thereafter. We're very pleased with the final result - James understood exactly what we were looking for and managed to make the whole process exciting rather than tedious. Highly recommended!

Steve Huse 11 years ago

Code23 undertook a large redevelopment project for us, including the rollout of over 100 individually branded websites. The overarching goals of the project were to improve: 1. Our Flexibility & Control 2. Customer Experience 3. Transparency Around Pricing All of which were delivered to an excellent standard, especially the new custom quote builder, which is industry leading! We look forward to continuing to develop these websites and build on the relationship with Code23 in future. Great work team!

Funeral Partners 6 years ago

Code 23 are a first class web design agency. James, Joe and their team are a pleasure to work with and made the process very easy from a client perspective. I was impressed with their ability to work up briefs quickly, their ability to keep to deadlines and the quality of the site that they delivered. They are highly recommended and an agency we will continue to work with on other projects.

Wilde Toast 6 years ago

What can I say! We are over the moon with our new company website. :) Code23 have most definitely got the 'WOW' factor. Eye catching design, superb user experience and extremely well project managed end-to-end. It was hassle free and the end result is far better than we ever imagined. I can't recommend enough. Thank you to James and the team. Top service!

chanelle kirkum 5 years ago

Code 23 are consummate professionals and I could not be more thrilled with the website they designed for me! With the minimum of fuss, maximum care, they guided me through the process and accommodated every one of my requests. I recommend them to absolutely everyone. You won't find better, I guarantee it.

Lucy Abrahams 11 years ago
faq

Questions about Websites & Apps

How much does it cost to develop a website in the UK?

There is no single UK price because a brochure site and a custom catalogue platform are different jobs. Blueprint defines templates, CMS depth and integrations, then current pricing is confirmed against that agreed scope.

Which platform should I use for my new website?

It depends on the job: WordPress for content teams, Shopify or WooCommerce for eCommerce, Payload for headless, custom for product-grade sites. We recommend what the business needs, not what we feel like building.

How long does a website project take?

Blueprint sets the timeline against templates, CMS depth and integrations. Marketing sites move faster than catalogue or multi-site rollouts - we say which you are buying up front. Agents compress build; content and migrations usually set the critical path.

Do you still build WordPress sites?

Yes. Twenty years of WordPress delivery sits alongside Astro, Next.js, SvelteKit and Payload. Stack follows the brief.

Can you rebuild an existing site without losing SEO?

Yes. Redirect maps, URL planning and content migration sit in Harden and Launch - SEO is not a post-launch patch.

Can AI agents really run website operations?

Yes, inside a clear remit. Agents draft content and SEO updates, triage enquiries, watch performance budgets and regress QA while seniors set the brief and own risk.

get started

Ready for a site or app that works hard?

Tell us what you are trying to ship. We will map the first phase and a realistic budget.