saas & platforms

SaaS development company for platforms, portals & MVPs

Platforms, portals and internal systems around your data model, built by senior engineers to a fixed scope.

350+ Projects delivered
60+ Five-star Google reviews
20+ Years building & ranking websites
50+ Businesses helped to implement AI
case studies

Systems replacing the sprawl

SAAS & OPERATIONS

Field operations platform digitising social housing maintenance

OI Group
OI Group project
SAAS, CRM & AI

The operations platform running a commercial property consultancy

ESHP
ESHP project
AUDIT-READINESS SAAS

Three connected apps with AI drafting and enforced human approval

Oditable
Oditable project
AGENTIC OPERATIONS PLATFORM

A multi-company control plane for agents, tasks, budgets and approvals

Opsko
Opsko project
SonyVodafoneSymantecXP PowerSonardyne
why platforms fail

Sprawl, shallow MVPs, late integrations

OI Group was burning 30+ admin hours a week across five SaaS seats and spreadsheet chains before their Business OS. Sprawl, shallow MVPs and late integrations kill platforms - so we pin down the workflows that retire on day one first.

[ 01 ]

Tool sprawl eating the week

Five SaaS seats, three spreadsheets and a brittle Zapier chain. OI Group was burning 30+ admin hours a week before their Business OS.

30+ hrsAdmin hours saved / week at OI Group
[ 02 ]

MVP that never becomes a product

Pretty shells with no billing edges, roles or data ownership. You learn nothing until months of rebuild.

MVP cutBilling and roles included in version one
[ 03 ]

Integrations bolted on late

APIs and SSO arrive after launch as change requests. Every connector becomes an unplanned sprint.

Scoped firstConnectors scoped before the build starts
capabilities

MVP through internal platform

SaaS MVPs that ship

A first release with paying users, billing edges and roles - scope stays tight so you learn before the surface area explodes.

Portals & dashboards

Client portals and ops views that retire spreadsheet chains, with roles, audit trails and the screens each team actually opens.

Internal business systems

Process-first platforms that retire overlapping SaaS seats - we model the workflow, then engineer the system around it.

API integrations

Stripe, CRMs, finance and legacy systems wired with contracts and failure handling baked into the build.

typical capabilities

Platform surfaces that usually ship in version one

Auth, billing, onboarding, admin and support - agreed in the scope, not a change-request pile after launch.

SAMPLE DATA
Subscriptions

Auth & billing

Plans, seats and Stripe-backed billing built into the product.

Live
Starter
£49 Plan
/ mo
Growth Active
£149 Plan
/ mo
Scale
Custom Plan
Quote
Seat utilisation 78%
MRR £62,400 +8.1% MoM

"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

How we work

Retire the sprawl in six deliberate steps.

Billing edges and data ownership pinned early. Architects stay through launch, with deep QA before anything goes live.

Step 1

Understand the brief

Users, billing edges, data ownership and the workflows the platform must retire on day one.

Scanning market
51.4360°N / 1.0651°W 6 signals

Step 2

Agree scope & price

Domain model, module boundaries, MVP cut and success metrics - fixed-scope quote locked.

Spec 02 / grid 8px
Scope locked 1390px

Step 3

Design & build

Senior specialists build in vertical slices: auth, core objects, admin and the first customer journey.

Sprint 03
Working software Week 2

Step 4

Test before launch

Deep QA, security review and automated regression tests around billing, permissions and data integrity.

Audit: release 2.4
✓
✓
✓
✗ ✓
✓
✓
0 critical 6 checks passed

Step 5

Go live

Migration plan, staged cutover and monitoring so load moves without a big-bang surprise.

Deploy: production Live
Uptime 100.00% v1.0.0

Step 6

Keep improving

Roadmap follows measured usage - modules, APIs and admin depth extend as demand proves them.

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

Send a platform scoping enquiry

Show us the tool sprawl or MVP brief. Leave with what to build first, where automation could save your team time, and a phase plan that retires the worst workflows.

You leave with
01 A build-vs-buy read on the platform bet
02 A phase plan that retires the worst workflows first
03 A realistic MVP boundary through launch
04 Integration and data-ownership risks called out early
why code23

Proof from platforms we have shipped

[ 01 ]

A working MVP, typically in 6 to 10 weeks

User auth, roles, Stripe billing, customer dashboards, API endpoints and automated tests, built to a fixed price with a 90-day warranty.

[ 02 ]

Platforms that retire tool sprawl

OI Group's Business OS replaced five SaaS tools and 30+ weekly admin hours. We build for the workflows you already measure.

[ 03 ]

Building platforms since 2005

Portals, ops systems and product software from Reading since 2005 - not a first-time SaaS experiment.

[ 04 ]

AI automation inside your platform

We can build AI into the product itself for onboarding nudges, support triage, usage outreach and billing recovery, so the platform runs with a lean team.

[ 05 ]

60+ five-star Google reviews

UK operators rate the work in public - proof when you pick a saas development company on delivery, not decks.

[ 06 ]

Scope and price agreed before the build starts

A discovery sprint ends with a fixed-price build proposal, and any additional work is agreed before it begins.

verified reviews

On the record, on Google

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

Platform thinking

MVP cuts, billing edges, portals and how internal systems retire spreadsheet chains.

View all posts
About Code23

30+ admin hours back. Five tools gone.

OI Group's Business OS retired five SaaS tools and 30+ weekly admin hours - the kind of sprawl we design platforms against. You work with the architects staying on the build: no relay desk, fixed-scope quotes and a 90-day warranty.

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 51.4360°N / 1.0651°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

SaaS questions, answered

What is a SaaS company?

A SaaS company delivers software on subscription rather than one-off licences. Building one means product, billing, admin and support paths from the first release - not just screens.

How much does SaaS development cost?

MVP cut, integrations and how much admin and billing you need in version one set the band. We define the first release together and confirm current pricing against that agreed scope before the build begins.

How long does it take to build a SaaS MVP?

A custom SaaS MVP typically takes 6 to 10 weeks. We agree the MVP cut and timeline before the build starts, so nobody discovers the product mid-sprint. Integrations usually set the critical path.

Do you build internal tools as well as customer-facing SaaS?

Yes. Business systems, portals and ops platforms are core work here - OI Group's Business OS replaced five SaaS tools and 30+ weekly admin hours.

Can you build AI features into our platform?

Yes. We build AI into the product itself for onboarding nudges, support triage, usage outreach and billing recovery, with clear rules on what it can do and when a person steps in. We also use AI tools during development, with senior specialists responsible for the work and its release.

How much does a SaaS MVP cost in the UK?

UK SaaS MVP cost depends on the MVP cut, billing depth and integrations required in version one. We define the first release together, then current pricing is confirmed against that agreed scope before the build begins.

Can I hire a SaaS development agency for a UK startup?

Yes. Startups hire us for a focused MVP cut - paying users, billing edges and roles - scoped up front so you learn before surface area explodes. You work directly with the architects building it.

get started

Which spreadsheet chain dies first?

Bring the workflows that burn the week. We'll bring platform scope, billing edges and architects who stay on the build through launch.