Custom CRM and web application development for UK businesses

Software that fits how you actually work

Most growing businesses end up running on nine tools that half fit, three spreadsheets nobody dares touch, and a process that only works because one person remembers it. We build the system that replaces all of it.

★★★★★5.0 across 52 Google reviews
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.
The work

Three builds,
and what changed after.

One for a trade business, one for an events company, and one we built for ourselves before we ever sold it to anyone else.

The Remove Spray Foam quoting 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 job is still fresh in the customer’s mind.

faster from survey to quote
4.5×more sales
Zeroenquiries lost between survey and quote
The Rolling Bean booking and quoting 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 day to day.

10×faster to get a quote out
Zeroenquiries falling through the cracks
Onesystem instead of a phone, a diary and a spreadsheet
The designbox sales and reporting system
Design Box
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. We would not put a business through a build we had not been through.

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




What we build for you

One system, and everything inside it is yours

This is a system we would build for a trade and installation business. Click through the modules. Notice that the agents and the automations are not bolted on afterwards, they live inside it.

FFenwickInstallationsKM
LiveQuoting agent drafted the Henderson quote · 2 min agoOwned by Fenwick Installations
Built as your software
An AI agent working inside it
An automation running

An illustrative example of a system we would build. Every one is designed around how that business actually works, and the real builds are just below.

The thing nobody admits

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

Every growing business hits the same wall. The tools nearly fit, so people invent workarounds, and eventually the workarounds are the process. Here is how it usually goes.

Where it starts

A tool per problem

One for quotes, one for jobs, one for invoices, a CRM nobody fills in properly, and a shared drive. Each was sensible on the day you bought it.

The tellNine subscriptions, and the same customer typed into four of them.

Nothing talks to anything else.

Where it gets worse

Spreadsheets fill the gaps

The bits no tool covers end up in a spreadsheet. Then the spreadsheet becomes load-bearing, and only one person really understands it.

The tellSomebody says “don’t touch that tab” and everybody nods.

Your process now depends on one person.

Where it ends

The business fits the software

Instead of the tools serving how you work, you start changing how you work to suit the tools. Growth gets harder and nobody can quite say why.

The tell“We’d love to do it that way but the system won’t let us.”

That sentence costs more than software ever would.

Swipe to read on

At some point it is cheaper to build the thing that fits than to keep paying for nine that nearly do.

Where they earn their keep

What we actually build

Most systems we build are a combination of these, put together around how your business really works. Pick one to see what goes into 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.
It chases the quiet onesFlags the quotes gone cold and the customers who have gone quiet, so nothing worth money slips.
Plugs into

XeroOutlookWhatsAppWebsite formsStripeCompanies House

A designbox client reviewing their system
What changes

Sales stops depending on whoever remembers to update the spreadsheet. The pipeline is real, because keeping it real takes no effort.

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.
Plugs into

SageGoogle MapsMobile appSharePointSupplier feeds

Cleaning and facilities website design by designbox
What changes

Operations stops being run on phone calls and memory. Nothing gets double-booked, nothing gets forgotten, and everyone can see where a job is.

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.
It knows what happened last timePrevious quotes, past jobs and what that customer paid, all attached.
It follows them upGentle reminders while a quote is still warm, and a nudge to you when one is worth a personal call.
Plugs into

XeroQuickBooksStripeGoCardlessDocuSign

The Remove Spray Foam quoting system built by designbox
What changes

Quotes go out the same day instead of the same week, and they are consistently priced no matter who builds them.

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.
It 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.
Plugs into

StripeYour websiteEmailSMSDocument storage

Hotel and hospitality website design by designbox
What changes

Customers get answers at midnight, and the phone rings less. Businesses we build these for typically cut inbound admin calls by half.

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.
Plugs into

Google CalendarOutlookSMSWhatsAppYour website

A designbox AI dashboard in use
What changes

The diary stops being a source of stress. Empty slots get filled and nobody spends their morning rearranging next week.

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.
It grows with youNew steps and tools added as the business changes, rather than starting again every time you outgrow something.
Plugs into

XeroPower BIZapiern8nYour own API

Professional association membership website design by designbox
What changes

The workarounds disappear. New starters learn one system, and the business stops depending on one person knowing where everything is.

Who this works for

You are probably ready for this if…

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

01

You pay for tools that half fit

Every quote takes a skilled person hours, and the slow ones lose the job to whoever answered first. Add up what you spend a year before you decide custom is expensive.

Usually 10 to 200 people
02

A spreadsheet runs something important

And only one person really understands it, and everyone quietly worries about that.

Almost every growing business
03

Your process is your advantage

You do something differently to your competitors, and generic software forces you to do it their way instead.

Specialists and niche operators
04

People are the integration

Somebody copies data from one system into another every day. That is a job a system should be doing.

Anyone with an admin bottleneck
05

You want to give customers a login

A portal where they see their jobs, documents and invoices, without paying per customer for the privilege.

Trades, services, wholesalers, agencies
06

Growth means hiring admin

Every new customer adds admin, so growing means more people rather than more profit. That is a software problem.

Anyone scaling on people, not systems

Your system talks to
everything else you use

Custom does not mean isolated. Your system connects to the tools you are keeping, so nothing gets rekeyed and nothing goes out of sync.

CRM & salesHubSpot, Salesforce, Pipedrive, Zoho, HighLevel, Monday
Accounts & financeXero, QuickBooks, Sage, Stripe, GoCardless
Web & ecommerceWordPress, WooCommerce, Shopify, Webflow, Magento
Email, chat & calendarsOutlook, Google Workspace, Slack, Teams, WhatsApp
Files, data & projectsSharePoint, Google Drive, Dropbox, Notion, Airtable, ClickUp
ReportingGA4, Google Ads, Meta Ads, Looker, Power BI

Logo wall: Kon to swap these tiles for real brand SVGs, greyscale on dark, uniform height. Built on mainstream, well-supported technology so any competent developer could pick it up. Custom software should never mean stuck with us. And if something has an API, or even just a spreadsheet export, we can almost always connect it.

How we work

From nine tools and a spreadsheet to one system

Every build goes the same five stages, and every stage ends with something you can see and use. No months of discovery and no strategy deck that sits in a drawer.

1

The blueprint

The designbox team working on an ecommerce campaign

Two to three days of senior time inside your business. We sit with the people doing the work, record their screens, and map how a job really travels from enquiry to cash, workarounds included.

A process map of how the business actually runs, not how the handbook says it does
An opportunity register, every one scored on return against effort
A solution architecture and a phased, costed roadmap
Yours to keep whatever you decide next. £2,000, credited against a six-month retainer
Within a fortnight
2

Prototype in your hands

A designbox AI build in use

We do not build for six months and hope. A clickable version of your system before we build the real thing. You use it, break it, and tell us what is wrong while changing it costs nothing.

Changes made in week three, not argued about in month five
Built inside the software you already run
Every screen agreed with the people who will use it daily
Your real quotes and jobs in it, not filler data
Inside month one, on both plans
3

Build, starting where the money is

designbox designers and developers at work

Built in stages you can see, with the agents and automations designed in from the start rather than bolted on afterwards. Whichever part earns the most goes live first, usually pipeline and quoting.

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
4

Move you over

What changes after a designbox AI build

The stage everyone quietly worries about, handled properly. Nothing is lost, nothing gets typed twice, and nobody arrives on a Monday to a system they have never seen.

Your data migrated, deduplicated and checked before anything switches off
The new system runs alongside the old until you trust it
Your team trained on the live system, not from a manual
Old tools cancelled one at a time, and the subscriptions with them
Alongside the build, not after it
5

Run, improve and hand over

The designbox team working together in the studio

Software is never finished, and 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 projects.

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.

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 hours22 min

You read it, change a line, send it

Processing an order

40 min6 min

You approve the one line that needs a decision

Chasing overdue invoices

3 hours12 min

You make the two calls that need a voice

Onboarding a customer

2 hours15 min

You set the credit limit and say hello

Screening 47 applications

4 hours20 min

You interview the four on the shortlist

Building the monthly report

2 days20 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.

Working together

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 30 days. Model and token costs sit on your own account, quoted up front, and are usually a small fraction of the savings.

Compare this with hiring in-houseOne developer costs about £99,070 in year one. See the full breakdown

This is the comparison worth doing, because it is the real alternative. Figures below are for one mid-level AI engineer, using current UK salary ranges and 2026/27 employer rates.

Hiring one developer
Salary mid-level, UK range £60k–£80k£72,000
Employer national insurance 15% above £5,000£10,050
Pension auto-enrolment minimum£1,320
Recruitment fee at 10%£7,200
Laptop, software licences and model access£4,800
Payroll, HR and employment legal support£1,200
Benefits, perks and a training budget£2,500
Hours you actually get 37.5/week, less holiday and sickness~1,684
Year one£99,070
  • Three to six months to hire, assuming you find the right one
  • That buys roughly 225 working days once holiday and average sickness come out, so about £440 for every day they are at their desk
  • Those hours land in office time only, so out-of-hours work waits until someone is back at their desk
  • One person, one skill set, and nobody covering when they are off
  • No quality control except their own
  • And they can hand in their notice
A full-time team with us
£4,950 a month£59,400
Employer national insuranceincluded
Pensionincluded
Recruitment feenone
Laptop, software licences and model accessincluded
Payroll, HR and employment legal supportnone
Benefits, perks and a training budgetincluded
Hours it can run once live, around the clock~8,700
Year one£59,400
  • Starts in weeks, not months
  • A strategist, an account manager, a project manager and build capacity
  • Runs overnight, weekends and bank holidays once it is live, so roughly five times the coverage for the same year
  • No holiday gaps, no sick days and no notice periods
  • Quality control built into every single build
  • A company standing behind the work, not one employee
Hiring one developer

£99,070

A full-time team with us

£59,400

£39,670 less in year oneand you get a team rather than a person

Salary range from current UK market data. Employer national insurance and pension at 2026/27 rates, shown before any Employment Allowance, which most businesses with existing staff have already used elsewhere. Recruitment at a conservative 10%. Hours are indicative: a full-time role of 37.5 a week, less statutory holiday and average sickness, against a system available around the clock once built. Every figure is an estimate to make the comparison honest, not a quote.

Where everyone starts
We record how the work is really done, not how the handbook says
We map enquiry to cash, then whatever else is on fire
Every opportunity scored on return against effort
A costed estimate for the lot, with no obligation

The AI blueprint

Nobody should build software before somebody has properly understood how the work actually gets done, including all the workarounds people are too embarrassed to mention. So that is what we do first.

£2,000two to three days of senior time
Credited in fullagainst a six-month retainer within 60 days
Book a blueprint call

You can skip it if your processes are already documented and your data is clean. In almost every business we look at, they are not. Not ready for a paid blueprint? Start with our free AI strategy overview.

AI BlueprintPrepared for your business · typically 40 pages
01How your business actually runs today8 pp
02Process map, enquiry to cash6 pp
03Where the time and the money leak5 pp
04Opportunity register, scored and ranked7 pp
05System architecture, screens and integration plan6 pp
06Data, security and approval gates4 pp
07Phased roadmap and costed estimate6 pp
✓ Yours to keep, whatever you decide to do next

Even if you never build anything with us, you finish with your processes documented and a specification you could hand to anyone.

The people behind it

Why Design Box

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

10+
years running the agency
51
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 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 Plus 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 blueprint exists so we can say so early.

The designbox team in a planning session
The designbox team working together in the Westcliff-on-Sea studio
The designbox team in the studio
The bit everyone worries about

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 Plus 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 blueprint.

Good questions

Custom software, answered honestly

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

Is custom software not much more expensive?
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 for were already spending five figures a year on software that half fitted, plus a person’s worth of admin time bridging the gaps.
How long does it 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 on end, so you see value long before the whole thing is finished.
What happens to our existing data?
It comes with you. Migration, deduplication and cleaning are part of the build, not an afterthought, and we run it in parallel so nothing is lost and nothing has to be typed twice. Old systems get switched off one at a time once you trust the new one.
Do we actually own the software?
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. Custom software should never mean stuck with us.
Why is this ongoing rather than a fixed project?
Because software is never finished. A system that stops evolving starts holding you back, and the businesses that get the most out of theirs are the ones who keep shaping it. The plan covers new features, integrations, hosting, monitoring and support, so changes are normal work rather than a new quote every time.
Where do AI agents and automations come in?
They are designed in from the start rather than bolted on. Because we build the system itself, the agents and automations have proper access to your data and can genuinely finish work rather than poking at an API from outside. That is the real advantage of owning the system.
Can it 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. 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.
What if we need to change something later?
That is expected, and it is what the ongoing plan is for. New process, new service line, new integration, a screen that turned out to be wrong. Changes are worked into the roadmap rather than treated as a fresh project with a fresh quote.
What does it cost?
Ongoing work 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. The blueprint is £2,000 and is credited in full against a six-month retainer if you go ahead within 60 days.
Who hosts it and who keeps it secure?
We do, and it is included. Hosting, monitoring, backups, updates and security are part of the plan, from a team that is Cyber Essentials Plus certified and has been looking after business-critical systems for over a decade. If you would rather host it yourself, that is fine too.
Will our team actually use it?
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, and if people are not using it we treat that as our problem to fix.
Do you build customer-facing apps too?
Yes. Client portals, booking systems, trade ordering, membership areas and marketplaces. The advantage of building it as part of your system is that customers see live, real information rather than a copy that has to be kept in step.
Next step

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