We are Code23

AI-native digital studio 20 years of craft Shipped at 5x speed.

We engineer AI agents, agentic marketplaces, bespoke SaaS platforms and high-converting websites. Production-grade software built to scale your business at speed.

2005

Code23 established

60+ five-star Google reviews

350+

Projects delivered

UK Based

Senior team, direct access

case studies

Recent Projects

MARKETPLACE PLATFORM

The UK's first dedicated kids' party marketplace, from concept to live bookings

Jollee
Jollee marketplace homepage shown on a laptop
AI PLATFORM & CRM

A bespoke operations platform with AI retrieval across everything a property consultancy holds

ESHP
ESHP operations platform dashboard on a desktop monitor
SAAS & MOBILE

Field operations platform and operative app digitising social housing maintenance

OI Group

“We're a property maintenance business, not a tech company. We came to Code23 with 30 years of industry knowledge, a head full of ideas and a spreadsheet-and-whiteboard operation, and asked them to turn it into a proper platform. A year on, our office runs on it daily: clients, contracts, jobs, quoting against schedule of rates, planning, and a full audit trail on every job from first survey through to invoice.”

Ian Morgan Co-founder, OI Group
OI Group platform and field app

Verified client review

OI Group / Project evidence

In their own words.

“We're a property maintenance business, not a tech company. We came to Code23 with 30 years of industry knowledge, a head full of ideas and a spreadsheet-and-whiteboard operation, and asked them to turn it into a proper platform. A year on, our office runs on it daily: clients, contracts, jobs, quoting against schedule of rates, planning, and a full audit trail on every job from first survey through to invoice.

What sets James and the team apart is how they work with you. Every founder call gets turned into something concrete within days - we'd describe how a job actually runs on site, and the next review we'd be clicking through a prototype of exactly that. They don't just take instructions either. When we asked for something that would have caused problems down the line, they said so and explained why, and they were usually right. You're getting a thinking partner, not an order-taker.

The bit that's impressed us most is the field app. They sat with us, pulled apart how our operatives really work - van checks, materials, RAMS, evidence photos, resident sign-off - and designed an app around the reality of the job, not a generic form-filler. Our engineers are not app people, and it's built so they don't need to be.

Responsive, straight-talking, and they genuinely understand how a trades business operates, which is rare in software people. We're now taking the platform to market as a product in its own right, which tells you what we think of the build quality. Couldn't recommend them more highly.”

Full review / 4 paragraphs
AI DEVELOPMENT & AGENTS

AI-drafted audit responses with a human approval on every send

Oditable
Oditable audit platform
MARKETPLACE PLATFORM

Rebuilding the UK's longest-running fine wine marketplace

Bid for Wine
Bid for Wine marketplace
MARKETPLACE PLATFORM

Free sponsorship infrastructure for every UK football club, grassroots to Premier League

Sponsorfy

“Working with Code23 to build Sponsorfy has been, without exaggeration, the single most important partnership I've made. What we're building isn't a website with a plugin bolted on - it's a genuinely complex, AI-native marketplace for football club sponsorship, and the layer of agentic experience we're weaving into the UX is the kind of thing most dev teams would flinch at. Code23 didn't flinch. They leaned in.”

Mark Makin portrait
Mark Makin Founder and CEO, Sponsorfy
Sponsorfy marketplace shown in a floodlit stadium setting

Verified client review

Sponsorfy / Project evidence

In their own words.

“Working with Code23 to build Sponsorfy has been, without exaggeration, the single most important partnership I've made. What we're building isn't a website with a plugin bolted on - it's a genuinely complex, AI-native marketplace for football club sponsorship, and the layer of agentic experience we're weaving into the UX is the kind of thing most dev teams would flinch at. Code23 didn't flinch. They leaned in.

From the very first sprint, it was clear these people get it. Not just the code, but the architecture of a marketplace where buyers, clubs, and AI agents all need to navigate a fluid, dynamic experience. They challenged our assumptions, pushed back on flows that looked clean on paper but wouldn't hold up in the wild, and brought a depth of UX and AI thinking that felt like we'd hired a senior product team alongside the engineers. That's rare. That's not what you get when you brief a “development partner.” You get a thinking partner.

The work ethic, though - I'll say it plainly - is almost unreasonable in the best way. Responsive at odd hours, proactive with solutions before we'd even articulated the problem, and a genuine, almost stubborn commitment to seeing the thing through properly. They treated Sponsorfy like it was their own product, and you can feel that in the craft of what they've delivered.

I wouldn't hesitate to put Code23 in front of any founder or team building something ambitious in the AI or marketplace space. They're the ones you call when the scope is scary and the stakes are real.”

Full review / 4 paragraphs
AUTOMOTIVE MARKETPLACE

Car buying where approved franchise dealers compete for the buyer

RevXtra

“We’ve been working with James and the team at Code23 on the development of RevXtra and the experience so far has been excellent.”

Billy Davis Co-founder, RevXtra
RevXtra automotive marketplace

Verified client review

RevXtra / Project evidence

In their own words.

“We’ve been working with James and the team at Code23 on the development of RevXtra and the experience so far has been excellent.

From the outset, they’ve taken the time to really understand what we’re trying to build rather than simply doing what we ask. They’ve challenged ideas when needed, offered solutions and helped turn what started as a concept into a genuine product.

Communication has been great throughout and it genuinely feels like they’re invested in making RevXtra a success, rather than us just being another client.

I’d have no hesitation recommending James and the Code23 team.”

Full review / 4 paragraphs
SonyVodafoneSymantecXP PowerSonardyne
services

Everything it takes to ship

Six core service areas, one senior team from first brief through launch day.

Choose your route

What are you trying to do?

Launch a marketplace

Multi-vendor commerce, payments and payouts, built to transact from day one.

Set course →

Build a SaaS product

From MVP to a platform your customers rely on every day.

Set course →

Implement AI agents

Agents that do real work inside the systems you already run.

Set course →

Rebuild your website

Fast, findable and easy to run, with a CMS your team actually uses.

Set course →

Ship an MVP

A working product in weeks, scoped to prove the idea.

Set course →

Design a better UX

Journeys that convert, backed by research rather than taste alone.

Set course →

Grow your ecommerce

Storefronts that load fast, rank well and sell more.

Set course →

Automate a workflow

Kill the manual steps that eat your team's week.

Set course →

Rank higher on search

Technical SEO and content that compounds month after month.

Set course →

Harden your platform

Performance, stability and security, measured and fixed.

Set course →

Build a mobile app

One codebase, shipped to both stores.

Set course →

Get ongoing support

A senior team on hand after launch, not a ticket queue.

Set course →
drag

"We've recently completed Phase 1 of a bespoke business valuation tool with James at Code23, and I've been extremely impressed. He took the time to understand both the commercial and technical requirements, communicated clearly throughout, and delivered a well-thought-out system."

Jason Atkins Director, Lansley Commercial
Delivery model

Humans lead. Agents execute.

Senior specialists direct a fleet of agents across research, design, build and QA. Every decision is signed off by a human.

Senior lead Directs · Decides · Signs off

Research agent

Reads the market, the code and the data

Design agent

Drafts variants while designers direct

Build agent

Scaffolds, wires and tests in parallel

QA agent

Checks more than any manual pass could

Every decision and every release is signed off by a human

Pricing manifesto

Stop buying hours. Buy shipped work.

Traditional agencies still bill £140/hr and sell attendance. AI-native delivery prices the outcome, not the time it takes to type.

Traditional agency

£140/hr

Time sold by the hour
  • 1. Client asks for custom landing page with CRM integration
  • 2. Agency estimates 16h @ £140/hr / £2,240
  • 3. Brief waits while hours and handoffs stack up
  • 4. Traditional agency sits on PR for 4 days
Code23 AI-native

Fixed band after Blueprint

Working software, not timesheets
  • 1. Client asks for custom landing page with CRM integration
  • 2. Fixed price after Blueprint, not billed hours
  • 3. Senior engineer directs agent loop to scaffold, wire and test in 42 mins
  • 4. Code23 ships in 24-48h at fixed price

No account managers. No timesheet friction. A fixed band you can plan around.

Start a project

How we work

The process behind
every build.

Clear decisions, working software early, and direct access to the people building it.

Step 1

01 - Map

We get clear on your users, business goals, existing systems and constraints. Then we identify what's worth building and where AI can help.

Scanning market
51.4551°N / 0.9787°W 6 signals

Step 2

02 - Blueprint

We shape the scope, product journeys, technical architecture and delivery roadmap. You'll know what we're building and why it matters.

Spec 02 / grid 8px
Scope locked 1390px

Step 3

03 - Build

Designers and engineers work together in short cycles, sharing working software early. AI increases speed; people own the quality.

Sprint 03
Working software Week 2

Step 4

04 - Harden

Deep QA and security audits before anything goes live. Agents test at machine depth; humans run the review loops and make the final call.

Audit: release 2.4
0 critical 6 checks passed

Step 5

05 - Launch

We prepare the product for production, launch carefully and learn from real usage.

Deploy: production Live
Uptime 100.00% v1.0.0

Step 6

06 - Evolve

We can keep supporting, optimising and extending the product, or hand it over cleanly to your internal team.

Release cadence
v1.0 v1.4 v2.0
Shipping weekly +340%

Testimonials

What our clients say

Real reviews from our Google Business profile.

Google 60+ reviews →

We've recently completed Phase 1 of a bespoke business valuation tool with James at Code23, and I've been extremely impressed. He has taken the time to understand both the commercial and technical requirements, communicated clearly throughout, and delivered a well-thought-out system with a high level of flexibility. The admin dashboard, in particular, gives us full control over the scoring and valuation logic, which was a key requirement. I'm looking forward to working with James on Phase 2 and would have no hesitation in recommending him to anyone looking for bespoke software development – Jason Atkins, Director, Lansley Commercial

Jason Atkins portrait
Jason Atkins Lansley Commercial

We couldn’t be happier with the service from Code23. They were a pleasure to work with—friendly, professional, and really took the time to understand our needs. They met our brief perfectly, delivering a website that looks great and performs exactly as we envisioned, all at excellent value for money. What sets Code23 apart is their aftercare. Knowing they are on hand to monitor and maintain our website means we never have to worry about its performance. Their ongoing support gives us complete peace of mind, and we’d highly recommend them to anyone looking for a reliable and skilled web development team

Dan Isterling portrait
Dan Isterling Premier Community

It has truly been a fantastic experience working with the Code23 team. Every part of the process from the scoping and onboarding down to the design and implementation of our website was handled excellently. The quality of service delivered by the team is globally top standard and I couldn't be more satisfied with the final outcome.

Samuel Elili portrait
Samuel Elili Redwire Group

I have worked with Code23 and their team for over 5 years across 3 different projects ranging from mobile app development to custom WordPress websites. Together the team bring a level of expertise and professionalism I have not seen anywhere else... The results achieved have really helped to grow our business. I highly recommend their services to anyone looking for a custom project to be completed on time and in budget.

Alexander Campbell portrait
Alexander Campbell EnjoyCBD

We worked with Code23 for a complete rebuild of our music related website. Excellent customer service and quality throughout and the build they have now completed is fantastic - exceeded all expectations across the board. Fantastic company with a dynamic and motivated team who are great to work with. Would highly recommend!

Nathan Fullbrook portrait
Nathan Fullbrook Jamma Music

Joe and the team at code23 have done a fantastic job helping us design and build our new website. I feel they really captured the quality of the Draks brand. Would highly recommend.

Louise Sellar portrait
Louise Sellar Draks

blogs

Latest from our blog

Notes from the studio on marketplaces, SaaS and building with AI.

View all posts
About Code23

Twenty years in. Zero passengers.

Building since 2005, rebuilt for the agentic era. You work directly with the people shaping and shipping your product - no account managers, no handoffs, and an agent layer that makes a small senior team feel like a big one.

Meet Code23
Est. 2005 Reading, UK Hands-on senior team
The Code23 team working together in the Reading studio
Fig. 01 - The team, Reading studio 51.4551°N / 0.9787°W
James, founder of Code23
Fig. 02 - James, founder EST. 2005
A product review session at Code23
Fig. 03 - Product review WK 34 / 2026
faq

Frequently Asked Questions

What does AI-native mean at Code23?

We use AI through the whole delivery cycle - strategy, design, engineering and QA - and we build AI into the products themselves where it earns its place. People stay accountable for every decision and for everything that ships.

What kinds of products does Code23 build?

AI agents and automation, SaaS platforms, marketplaces, websites and mobile apps - from a first MVP through to systems that run whole businesses.

Can you improve an existing website, platform or product?

Yes. Much of our work starts with something already live: adding AI capability, rebuilding performance-critical parts, or extending a platform your team already relies on.

How does a project with Code23 start?

With a short conversation, then a mapping phase covering your users, goals, systems and constraints - so you have a clear blueprint, roadmap and price before build starts.

Do you provide support after launch?

Yes. Managed support, performance and security, SEO and conversion, and continuous development - or a clean handover to your internal team with the code, documentation and knowledge they need.

Where is Code23 based, and who will we work with?

We're based in Reading, UK. You work directly with the senior designers and engineers doing the work - no account-management layer.

What size projects does Code23 take on?

Most projects run from a focused MVP measured in weeks to multi-year platform partnerships. We're not the cheapest route - we're built for products that have to work in production.

get started

What are you trying to build?

If you've got a product idea, a marketplace opportunity or a workflow that should work better, let's talk it through.