Quantum Craft publishes its prices. Most engagements start with one of four first steps: £3,500 for an AI-built app audit, £4,500 or £8,500 for a specification sprint, from £4,950 for an AI readiness assessment and from £6,500 for tech due diligence, all excluding VAT. A focused MVP typically costs £35,000 to £80,000 over 6 to 12 weeks.
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Pick the one that fits the decision in front of you. The audit and the sprint have fixed fees; the assessment and the due diligence start from a figure, because how much ground they cover varies.
£4,500 or £8,500excluding VAT
One week for a single workflow, two for a platform
Anyone about to commission a build: every build we take on starts here.
From £4,950excluding VAT
One to two weeks
UK companies that suspect AI could help, but not where or what it would be worth.
£3,500, fixedexcluding VAT
About a week
Founders whose Lovable, Bolt.new, Replit or v0 app now handles money, health data or customer records.
From £6,500excluding VAT
One to two weeks
Investors and acquirers, and founders who would rather find the problems before an investor does.
After the specification, a build is quoted from it. These are the shapes we have built, with the band each one's case study publishes for work of that shape.
| Shape | Our example and its scope | Time | Indicative band |
|---|---|---|---|
| Single-workflow MVP | One workflow built to production standard. The bottom of the band has one user type and no integrations; the top adds payments, an admin surface and a second audience | 6 to 12 weeks | £35,000 to £80,000 |
| Practice platform | Karu: scheduling, records, notes and video | About 14 weeks of core build | £90,000 to £140,000 for this phase |
| Two-sided marketplace | A B2B logistics marketplace: the first transactable phase | Phase one of a multi-year programme | £125,000 to £170,000 |
| Field-service compliance platform | BlueWave: web app, offline mobile app, scheduling and billing | About 14 weeks of core build to first release | £150,000 to £250,000 to first release |
| Platform with native apps and payments | NForge: web and native mobile apps, Stripe Connect payments and live video | 30 to 40 weeks | £260,000 to £340,000 |
| Data platform programme | TIYO: a crawl engine, an event store, analytics and several products | Two to three years | £350,000 to £550,000 across the programme |
All bands exclude VAT and costs paid to third parties such as hosting and infrastructure, at London rates as of mid-2026. They are bands for the shape, not an invoice: your figure comes from the specification. Once the product is live, plan for 20 to 30 per cent of the build cost a year to run it and keep changing it.
Pricing follows how well the work is understood before it starts.
| Model | When we use it | How it works |
|---|---|---|
| Fixed price | Work with an agreed specification | One price, paid against milestones; scope changes agreed in writing first |
| Time and materials | Discovery-heavy work, where the problem is still moving | Billed for the days worked |
| Retainer | Ongoing product work after launch | A set amount of senior time a month; BlueWave's runs at two to three days a week |
Any change of scope is agreed in writing before the work changes.
Each of these is a promise made elsewhere on this site or in our terms.
So you can judge whether a first step is worth a call before you make one. A fee that is published cannot bend to fit what the work turns up, and every case study publishes the band for its own shape.
No. Every fee and band on this page excludes VAT, as the prices in our quotes do unless a quote says otherwise. The build bands also leave out costs paid to third parties, such as hosting and infrastructure.
Because typing was never most of the cost. AI saves real time on wide, repetitive changes. Specification, architecture, review and testing take as long as they always did, and they are what keep a product working after launch. We spend the saved hours there, which is why our bands look like a senior team's.
Yes. Every first step ends in something you keep, a specification or a report, and nothing in it commits you to the next stage. Each later stage is priced in writing before it starts.
Plan for 20 to 30 per cent of the build cost a year to run the product and keep changing it. Ongoing work usually runs as a retainer; BlueWave's is two to three days a week of senior time. If you would rather take the product in-house, the handover is written down and the code is documented for your team.
Tell us about a product you want built, or a decision about AI you need to make, and we'll set up a 30-minute call. You'll get a straight answer on what it would take, including when the answer is that you don't need us.
We reply within one working day
By email, to arrange a time for the call.
A free 30-minute call
With a senior engineer, not a salesperson, about what you are building or deciding.
The fee in writing first
If a first step is worth taking, you get its exact fee in writing before any work starts.