The Biggest Mistake UK Founders Make
They spend six months and £60,000 building the wrong thing.
They build every feature on their wishlist. They polish the UI before a single user has tried it. Then they launch and discover the core assumption was wrong.
A well-built MVP solves this. It is the fastest, cheapest way to find out if your idea works — before you commit serious money.
What is an MVP?
A Minimum Viable Product is the smallest version of your product that:
- 1. Delivers the core value to a real user
- 2. Validates your key business assumption
- 3. Generates enough feedback to make smart next decisions
BigBerri's MVP Sprints
We run 4–8 week MVP sprints for UK founders:
Week 1: Discovery — define the one hypothesis your MVP tests. Map the critical user journey (2–5 screens maximum).
Weeks 2–4: Build — core feature only. User auth. Basic database. No admin panels, no dashboards, no secondary features.
Weeks 5–6: Test — beta with 5–10 real users. One round of prioritised changes.
Weeks 7–8: Polish & Launch — payment integration (if needed), onboarding flow, production deployment.
MVP Costs for UK Startups
| Scope | Typical Cost | Timeline |
|---|---|---|
| Simple web MVP | £8,000–£20,000 | 4–6 weeks |
| Full-stack web MVP | £15,000–£35,000 | 6–10 weeks |
| AI-powered MVP | £25,000–£60,000 | 8–14 weeks |
Fixed price. Agreed upfront. No hourly billing.
What Happens After the MVP?
Real usage data tells you whether to double down, pivot, or stop. It is infinitely more valuable than additional development based on assumptions.
Book a free MVP scoping call — we will tell you honestly whether your idea is ready to build.
Frequently Asked Questions
What is included in a BigBerri MVP?
Core feature development, user auth, mobile-responsive design, production deployment, basic analytics, and 30-day post-launch support.
Can you build an AI-powered MVP?
Yes. We build MVPs with AI features including chatbots, content generation, and AI-powered recommendations. These typically take 6–10 weeks.
Do you charge hourly or fixed price for MVPs?
Fixed price, agreed before we start. No surprises.