Quantum Craft is a software and AI development agency in London. We build software products and AI features, and our AI consultancy helps UK companies adopt AI safely.
Each case study gives the phases, team shape and price band for a build like it. We still work on most of the platforms we build after launch.
The brief was one system for UK water-hygiene contractors, from scheduling and an offline field app to five-year compliance records. When the LCA auditor arrives, the evidence is one search away.
Published fact: In use with six contractor organisations
Case study: BlueWave, Water-hygiene compliance
We were engaged to design and build NForge, business software for independent fitness coaches, with native apps, storefronts and payments. Its AI programme generator runs around thirty checks before a coach sees a plan.
Published fact: Payments released per delivered session
Case study: NForge, Fitness · coaching platform
After years in production, TIYO, the retail-intelligence platform we were engaged to build, is being re-platformed. It showed fashion buyers what sold out, how fast and in which sizes.
Published fact: 22 retailers tracked across 13 countries
Case study: TIYO, Fashion retail intelligence
Karu is a practice platform for UK therapists that we were engaged to design and build for a family-run business, so that client confidentiality never depends on someone remembering a rule.
Published fact: Clinical notes never enter the search index
Case study: Karu, Mental health · private practice
Under NDA, a UK client engaged us to build a two-sided marketplace matching businesses that need warehousing and transport with providers that have capacity. The screens here are indicative.
Published fact: Five AI features in production
Case study: B2B logistics marketplace, Logistics · two-sided marketplace
We were engaged to build Treble, a music-theory exam practice platform: lessons, quizzes and mock exams for students, and a studio where educators write and publish the lessons.
Published fact: Subscriptions by the grade
Case study: Treble, Education · music exam practicePlatforms we build on
Every first step has a published fee, excluding VAT, and you can stop after it and keep what it produced.
Every fee on one pageYou have a product to build, or an MVP that has to survive real users.
MVPs, SaaS platforms, mobile apps and AI features inside products you already run. A focused MVP typically costs £35,000 to £80,000 over 6 to 12 weeks.
First step
You can take the specification to any supplier, us included.
You suspect AI could help your business, but not where, or what it would be worth.
The engineers who would build it give the advice, and set up the governance UK GDPR and the EU AI Act expect.
First steps
For investors, or for founders preparing a raise. It covers code written with AI tools too.
Your Lovable, Bolt.new or Replit app is about to take payments or hold customer records.
A senior engineer reads the code and every path money or personal data takes, then prices the options: harden, refactor or rebuild.
First step
Not sure which of these you need? Start with the free call
The people who scope your product are the people who build it.
One of our senior engineers takes the first call, so your questions get engineering answers.
A senior engineer leads each build. They agree the specification with you first and sign off the architecture decisions.
A senior engineer reads every change before it merges, and automated tests run on every one.
It is sized to the build, with design where the product needs it. Larger programmes have run four to six engineers at peak.
Nothing lives only in one person's memory: the specification, decision records and tests can sit in your repository from the first commit.
Before you sign, ask to meet the engineers who would build your product
Every change starts from a written specification and ships only after senior review and automated tests.
Gate: Specification agreed, by you
Discovery and specification
One to two weeks
What gets built, how, what it should cost and what could go wrong, written down for you to agree.
Gate: Tests in place, by an engineer
Kick-off
First week of the build
We set the milestones and put the automated tests in place before any feature work starts.
Gate: Reviewed and tested, approved by a senior engineer
Build
Two-week cycles
At the end of every cycle you click through working software.
Gate: Released by an engineer
Launch and handover
Final cycle
We release to production after a security and performance pass, then hand over documentation your team can run the system from. The code is yours on full payment.
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.