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Custom software that makes your business run better

Software that runs how you actually work

We are an AI software development company in the UK. We build one system your business runs on, so the quoting, the jobs, the customers and the reporting stop living in nine different places.

★★★★★5.0 across 52 Google reviews
A business overview dashboard built by designbox, showing key numbers, recent jobs and revenue by service in one place
Built around you, not the other way roundNo forcing your business through software that was designed for somebody else's.
Agents and automations built inNot software you then have to automate. The work runs inside it from day one.
You own it outrightThe code, the data and the documentation. No per-seat fees rising every year and no lock-in.
Does this sound like you?

Your business does not run on software.
It runs on workarounds.

We have had this conversation with nearly every business we have built for. It never starts with software. It starts with three small compromises that nobody notices until they are the way the business runs.

A different tool for every job, and none of them talk to each other

You are paying nine subscriptions, and the same customer gets typed into four of them.

A spreadsheet is holding something important together

It works, but one person built it and everyone else is quietly nervous about the day they are off.

You have started changing how you work to suit the software

Somebody says "we would love to, but the system will not let us", and everybody accepts it.

Recognise yourself? The fix is not another tool.

Who bespoke software works for

You are probably ready for this if…

Not every business needs custom software. These are the signs that you do.

Where custom software pays off

Most businesses need two or three of these, not all six

They are built as one system, so the quote that becomes a job becomes an invoice without anyone retyping it.

Custom CRMOperations platformQuoting & proposalsClient portalBooking & schedulingInternal tools
Built on your pipelineYour stages, your language, your rules, rather than someone else’s idea of how sales works.
One record per customerEvery quote, job, message, document and invoice against one company, not scattered across four tools.
The fields you actually useNo 40 empty boxes nobody fills in, and no paying per seat for features you will never open.
Agents working inside itEnquiries captured, quotes drafted, follow-ups chased, all from within the same system.
Chases the quiet onesFlags the quotes gone cold and the customers who have gone quiet, so nothing worth money slips.
Reports you can trustPipeline value, conversion and where deals stall, from the same data everyone works in, not a spreadsheet someone rebuilt.

Not sure which you need? Start with an AI assessment and strategy.

XeroOutlookWhatsAppWebsite formsStripeCompanies House

Custom CRM built by designbox, showing a sales pipeline and a customer record
Jobs, not just dealsScheduling, engineers, vans, parts and documents in the same place the sale was won.
Built around your workflowWhatever your actual stages are, including the awkward ones that no off-the-shelf tool allows for.
Paperwork generated for youCertificates, method statements, delivery notes and handover packs, produced from the job data.
Live to everyoneThe office, the engineer on site and the customer all see the same thing at the same time.
Costed as it runsLabour, parts and time captured against each job, so you see what it actually made, not what the quote assumed.
Works on siteEngineers see their day, log time and photos, and close jobs from a phone, so the office is not chasing paperwork.

Not sure which you need? Start with an AI assessment and strategy.

SageGoogle MapsMobile appSharePointSupplier feeds

Operations platform built by designbox, showing a weekly schedule by engineer
Your pricing, encodedRates, margins, discounts and rules built in, so quotes are right without anyone checking a spreadsheet.
Proposals that look like youBranded documents with your terms, produced in minutes rather than an afternoon.
E-signature built inCustomers accept online at eleven at night, and the job creates itself.
Knows what happened last timePrevious quotes, past jobs and what that customer paid, all attached.
Follows them upGentle reminders while a quote is still warm, and a nudge to you when one is worth a personal call.
Margin you can seeEvery line shows what it makes, so nobody sends a quote that loses money by accident.

Not sure which you need? Start with an AI assessment and strategy.

XeroQuickBooksStripeGoCardlessDocuSign

Quoting and proposals tool built by designbox, showing a quote builder with margins and pricing rules
Your customers, self-servingQuotes, documents, job progress, invoices and payments, without ringing you.
No per-seat fee for themGive it to every customer without the cost going up. Try that with off-the-shelf software.
Branded as yoursYour logo, your colours, your domain. Most customers assume you built it in-house.
Answers questions tooAn agent handles the routine ones instantly and passes the rest to a person with the history attached.
They pay in itDeposits and balances paid online the moment a quote is accepted, straight through to your accounts.
Approvals in one clickQuotes, variations and sign-offs happen in the portal, with a record of who agreed what and when.

Not sure which you need? Start with an AI assessment and strategy.

StripeYour websiteEmailSMSDocument storage

Client portal built by designbox, showing a customer view of jobs, documents and invoices
Availability that understands your businessSkills, kit, travel time and working hours all considered before a slot is offered.
Customers book themselvesOr your team books them in seconds, with everyone notified automatically.
Reminders and reschedulingFewer no-shows, and changes handled without a chain of phone calls.
Cancellations filledA waiting list that actually gets used, because the system offers the slot the moment it opens.
Routes the day sensiblyJobs ordered to cut travel and backtracking, so more fits into the same day without anyone planning it.
Deposits taken up frontPayment or a deposit at the point of booking, so a full diary is also a paid one.

Not sure which you need? Start with an AI assessment and strategy.

Google CalendarOutlookSMSWhatsAppYour website

Booking and scheduling system built by designbox, showing a week calendar of bookings
The bespoke bitsWhatever your business does that nothing off the shelf handles. That is usually the bit that makes you money.
One login, one source of truthRoles and permissions, so people see what they should and nothing more.
Everything connectedThe system talks to your accounts, your website and your suppliers, so nothing gets rekeyed.
Reporting built inLive numbers from the system itself, not exported and stitched together later.
Grows with youNew steps and tools added as the business changes, rather than starting again every time you outgrow something.
Approvals, not email chainsPurchase orders, expenses and time off routed to the right person with one click to approve.

Not sure which you need? Start with an AI assessment and strategy.

XeroPower BIZapiern8nYour own API

Internal operations dashboard built by designbox, showing an approvals queue and activity feed
Bespoke software in the real world

What changes when the software actually fits

A trade business, an events company, and our own. Every number below was measured before and after, not estimated.

Remove Spray Foam, a bespoke quoting and job system built by designbox
Remove Spray Foam · Spray foam removal

Survey in the morning, quote out the same day

Quoting meant notes from the van, a spreadsheet and an evening at the desk. The survey now feeds the quote, their own pricing is already in it, and it lands while the customer is still thinking about them.

Read the case study
5×faster from survey to quote
4.5×more sales
Zeroenquiries lost between survey and quote
The Rolling Bean, a bespoke events and booking system built by designbox
The Rolling Bean · Mobile coffee bar hire

The whole operation, in one system

Enquiries, availability, quoting, jobs and invoicing in one place, built around how they actually run events. Still being built out, already running the business.

10×faster to get a quote out
Zeroenquiries falling through the cracks
Onesystem instead of a phone, a diary and a spreadsheet
designbox, our own sales and reporting system
designbox · Our own sales and reporting

We ran it on ourselves first

Pulling our sales and reporting together took seven hours a week. It takes 45 minutes now, and the hours that came back went into selling rather than admin.

45 minto do what used to take seven hours
2.5×sales capacity within three months
6 hrsback with the sales team every week

94%

less time on the jobs below

Across the jobs below, the average is a 94% cut in hands-on time, and the numbers get more reliable rather than less.

Writing a proposal

4 hours→22 min

You read it, change a line, send it

Processing an order

40 min→6 min

You approve the one line that needs a decision

Chasing overdue invoices

3 hours→12 min

You make the two calls that need a voice

Onboarding a customer

2 hours→15 min

You set the credit limit and say hello

Screening 47 applications

4 hours→20 min

You interview the four on the shortlist

Building the monthly report

2 days→20 min

You read two pages and change what you disagree with

Estimates for typical processes, not results from a specific client. The measured before-and-afters are up in the case studies. What matters is not the exact number, it is that the person who used to spend their week on this now spends it on work that needs a person.

How we build bespoke software

Four stages, and you see something working in every one

Once the assessment has told us what to build, every project runs the same way. No months of discovery, no strategy deck that sits in a drawer, and nothing you cannot click on.

1

Designed and mapped before anything is built

The designbox team mapping out a client system before it is built

We plan the whole thing on paper first: how your data is structured, how a job moves from one stage to the next, who does what and where the approvals sit. Then we design every screen around it and link them together so you can click through your own process before a line of code exists. Getting it wrong here costs days of work. Getting it wrong later costs a rebuild.

Your processes and data mapped out properly, before any of it is built
Designed around how you already work, not how the software would prefer it
Every design and process agreed with the people who will use it daily
Every integration and handover point worked out before the build starts
Inside month one, on both plans
2

Built in stages, quickest win first

A designbox developer building a bespoke business system

Built in stages you can actually use, with the agents and automations designed in from the start rather than bolted on afterwards. Whatever saves the most time goes live first, usually quoting and pipeline.

Working modules released in stages, not one big launch
Integrations into your CRM, accounts, website and comms
Live reporting from the system itself, with no exports
You use each module as it lands, so feedback shapes the next one
First module live in 60 to 90 days
3

Everyone actually using it

The designbox team walking a client through their new system

The stage that decides whether any of it was worth doing. Whatever you run on now, spreadsheets, a CRM nobody fills in, a shared drive, comes across and gets checked. Then we run the new system alongside the old one until your team trusts it, rather than switching everything off on a Friday and hoping.

Whatever you run on now brought across, tidied up and checked
The new system runs alongside the old until people trust it
Your team trained on their own live data, not a manual
Old tools switched off one at a time, so you can cancel the subscriptions
Alongside the build, not after it
4

Improved every month, never finished

The designbox team reviewing a client system in a monthly session

A system that stops evolving starts holding you back. New processes, new integrations, the client portal you add in month four because customers keep asking, all handled inside the plan rather than quoted as a fresh project every time.

Hosting, monitoring, backups and security, handled
A monthly impact report in plain English
One team training session every month
Full ownership of everything built, with no lock-in
Ongoing, and cancellable

You see it working from week three, and you keep seeing it. The system arrives in stages your team has already used, not as one launch day.

Where every build starts

Know where AI pays in your business before you spend a penny building it

A 30-day AI assessment. We look at how the work actually gets done, score every opportunity on what it returns against what it costs, and hand you a plan with the quick wins first. It is yours whether you build with us or not.

How it works

01

Discovery

We sit with the people doing the work and record how it actually happens, workarounds included. Your tools, your data, where the time goes.

02

Blueprint

Every opportunity scored on return against effort. A phased, costed roadmap with the quick wins first, written for your business rather than pulled from a template.

03

Execution, if you want it

We build, deploy and train your team, starting with whatever pays back first. Or you take the plan elsewhere. It is yours either way.

AI assessment and strategy
£995
plus VAT, one off

What you walk away with

Exactly which processes to automate first, and which to leave alone
What each one costs to build and what it saves, so you can decide on numbers rather than a hunch
A phased plan any developer could price, with the quick wins at the top
Your processes properly documented, probably for the first time

Credited back in full if you ask us to deliver any of the work within 90 days, so the assessment costs you nothing.

See how the assessment and strategy worksBook a free 30 minute call

Most assessments find two or three things worth building and one worth killing. Either way you stop guessing.

Not ready to commit? Start with our free AI strategy overview.

Ways to work with us

Two ways to work with us

Custom software is built and then it lives, so we work as an ongoing partner rather than quoting a project and disappearing. Both plans are run through a Design Box account manager who knows your business. Prices exclude VAT.

Part-time team
£2,500a month

For building steadily, one part of the business at a time.

A working prototype in your hands inside month one
Fortnightly strategy calls with your strategist
Custom software, integrations, agents and automations built to your roadmap
Integration with the systems you already run
Ongoing monitoring, tuning and optimisation
Monthly impact report in plain English
One team training session every month
Dedicated Design Box account manager
Talk about part-time
Most businesses start here
Full-time team
£4,950a month

For replacing the lot properly, with several parts of the system being built at once.

Everything in part-time, plus:
Weekly strategy calls instead of fortnightly
Several builds running in parallel rather than one at a time
Priority build queue
Deeper integrations and custom software where it is needed
Hosting, monitoring, backups and security included
Quarterly review of the roadmap against actual results
Talk about full-time

Three-month minimum, then rolling and cancellable with about a week. Model and token costs sit on your own account, quoted up front, and are usually a small fraction of the savings.

Already know what you need built? Request a quote and we will price it.

The team behind your system

Why designbox for bespoke software development

Plenty of people are selling AI who have never run a business. We have, from Essex, for over a decade.

0+
years running the agency
0
five-star Google reviews

You get people, not a portal

One account manager who knows your business and who you can actually ring. You never explain yourself twice.

We have been building bespoke software for over a decade

Websites, stores, CRMs and reporting are our day job. Plenty of firms will sell you a build. Far fewer are still answering the phone about it three years later.

Ten years of being accountable

Cyber Essentials certified, a decade of building and running business-critical systems, and clients we started with years ago. AI is new. Answering for the outcome is not.

We will tell you when it is no

Some processes should not be automated and some businesses are not ready. The AI assessment exists so we can say so early.

The people behind your system

We are a small, close-knit team based in Southend-on-Sea. You will speak to us directly from day one, and that is exactly the point.

The designbox team in a planning sessionThe designbox team looking after a client system day to dayThe designbox team in the studio
Owning your software and your data

Your data, your rules, your systems

Two questions come up in every single conversation: what happens to our data, and what happens if we leave. Here are both answers up front.

You own everything we build

The code, the database and the documentation are yours, not licensed back to you
Built on mainstream technology any competent developer could take on
Everything runs on your accounts, so your data stays in your systems
If you leave, you keep the lot and we hand it over properly, documented

No lock-in and no hostage-taking. If we are worth keeping, it will be because the work is good.

Security and control

Cyber Essentials certified, and a decade of handling client systems
Hosted on your own infrastructure if you want it that way
A full audit trail of every change, who made it and when
Roles and permissions, so people only see what they should

Where AI is involved, the model and processing arrangements are covered in writing before anything touches live data, and we go through them in the assessment.

Custom software questions

Custom software development, answered honestly

Can’t see yours? Ask us anything on a quick call, no obligation.

How much does bespoke software development cost in the UK?
Ongoing development is £2,500 a month part-time or £4,950 full-time, excluding VAT, with a three-month minimum. That covers building, hosting, monitoring, support and continuing development, so there is no separate bill every time something changes. Most bespoke software projects in the UK are quoted as a fixed build in the tens of thousands, then charged again for every change. We price it as a team you retain instead. The AI assessment and strategy that comes first is £995 and is credited back in full if you ask us to deliver any of the work within 90 days.
Is custom software development more expensive than off-the-shelf tools?
Compare it properly before deciding. Add up every subscription, every per-seat fee that grows as you hire, every add-on, and the hours people spend moving data between tools. Most businesses we build bespoke software for were already spending five figures a year on tools that half fitted, plus a person’s worth of admin time bridging the gaps. Custom software replaces that spend rather than adding to it, and the cost stops rising every time you hire someone.
How long does bespoke software development take?
You will have a clickable prototype in your hands inside month one, and a working first module usually 60 to 90 days in. We build in stages rather than disappearing for months, so the first thing that saves you time is live long before the whole system is finished. The AI assessment and strategy beforehand takes about a week and sets the order everything gets built in.
What happens to our existing data when we move to a custom system?
It comes with you. Migration, deduplication and cleaning are part of the build, not an afterthought, and we run the old and new systems in parallel so nothing is lost and nothing has to be typed twice. Old tools get switched off one at a time, once you trust the replacement.
Do we own the software you build for us?
Yes, entirely. The code, the database, the documentation and the designs are yours, built on mainstream technology any competent developer could pick up. It can be hosted on your own infrastructure if you prefer. Bespoke software should never mean being stuck with the agency that built it.
Why is bespoke software an ongoing retainer rather than a fixed project?
Because software is never finished. A system that stops evolving starts holding the business back, and the companies that get the most from theirs are the ones who keep shaping it. The retainer covers new features, integrations, hosting, monitoring and support, so a change is normal work rather than a new quote every time.
How do AI agents and automations fit into custom software?
They are designed in from the start rather than bolted on afterwards. Because we build the system itself, the AI agents and automations have proper access to your data and can finish a piece of work end to end, rather than poking at an API from outside. That is the real advantage of owning the system the AI lives in.
Can custom software replace our CRM completely?
Usually, and that is often the point. Off-the-shelf CRMs are built for a generic sales process, which is why yours is half empty and why people keep a spreadsheet alongside it. Where a mainstream tool genuinely fits we will tell you to keep it and connect to it instead. We would rather build the parts that earn their keep than replace things for the sake of it.
What if we need to change the software later?
That is expected, and it is what the retainer is for. A new process, a new service line, a new integration, or a screen that turned out to be wrong in practice. Changes go into the roadmap rather than being treated as a fresh project with a fresh quote.
Who hosts bespoke software and who keeps it secure?
We do, and it is included in the retainer. Hosting, monitoring, backups, updates and security come from a team that is Cyber Essentials certified and has been running business-critical systems for over a decade. If you would rather host it on your own infrastructure, that is fine and the software is built so you can.
Will our team actually use a custom system?
They are involved from the mapping stage and they use the prototype before anything is built properly, which is the single biggest reason internal systems succeed or fail. Training is included every month. If people are not using it, we treat that as our problem to fix rather than yours.
Do you build customer-facing web applications as well as internal systems?
Yes. Client portals, booking systems, trade ordering, membership areas and marketplaces. The advantage of building a customer-facing app as part of your own system is that customers see live information rather than a copy that has to be kept in step.
What size of business is bespoke software development worth it for?
Typically 10 to 200 people, though it is about complexity rather than headcount. If you are running on several tools that do not talk to each other, paying per seat as you grow, or relying on a spreadsheet nobody dares touch, a custom system will usually pay for itself. The assessment tells you whether it would, before you commit to a build.
How do we start a bespoke software project?
With a AI assessment and strategy and strategy. We spend two to three days inside the business, score every opportunity on what it returns against what it takes to build, and hand you a costed, phased plan. If you would rather talk it through first, book a free 30 minute call.

AI software development and bespoke software, built around your business

designbox is an AI software development company in Southend-on-Sea, Essex, building bespoke software for businesses across the UK. We build the system a business actually runs on: one place for jobs, quotes, customers, stock and reporting, replacing the nine tools that half fit and the spreadsheets nobody dares touch. Custom software development means the software fits your process rather than your team bending round somebody else’s. Bespoke software development in the UK is usually sold as a build and a handover. We do it differently: a blueprint first, a working prototype in your hands early, then a build that starts where the money is, so you see a return before the whole thing is finished. AI is not the product, it is the part that removes the manual work: reading the email, writing the quote, chasing the invoice, flagging the job that is about to slip. As an AI development agency we only add it where it earns its place. Everything we build is yours outright, the data stays yours, and we will tell you honestly when the answer is an off-the-shelf tool rather than a build. Related work: AI automation, AI agents, AI reporting and insights and AI strategy and consultation.
Start your AI assessment

Let’s work out what your system should actually do

Thirty minutes, no hard sell, and an honest answer either way.

Rather check us out first? Ask an AI what it makes of us

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