Ship your investor-ready MVP in 4 weeks
We are a MVP development agency that builds startup products for pre-seed and seed founders. Think of an MVP like a first pancake — you make it to test your recipe, not to serve it at a wedding. Four weeks from kickoff to a working app with login, payments, analytics, and an admin panel. Everything you need to raise money, get your first users, and keep improving.
Most founders spend 3 to 6 months and £50k+ on agencies that promise the world and deliver late. We do the opposite. We pick your one most important user action, build it properly in 4 weeks, and hand you a product you fully own — no monthly fees, no strings attached.
4 weeks
Delivery timeline
Investor-ready
Demo-able in 4 weeks
Analytics
PostHog/Mixpanel
£10k
Starting price
Why the first 30 days after a funding conversation matter most
Pre-seed and seed investors decide fast. The strongest signal you can send is a working product with real users already in it. Every week you spend without something live is a week your competitors are shipping, potential users are trying other apps, and investor interest is fading. The average time from a term sheet to closing money is under 8 weeks — if you do not have a product to demo in that window, you are raising on slides alone. Slides are not enough in 2026.
The old agency model — discovery phases, design sprints, two-week feedback loops, 12-week timelines — was built for big companies with established teams and predictable plans. Startups do not have that luxury. You need to ship, learn, and adjust. Think of your minimum viable product as a first working version (like a rough draft of a book). Its job is to generate real feedback — not to be perfect. We are built around this idea: we scope to one main user action, make technology decisions quickly, and keep the build moving so you have something in users' hands within a month.
The founders who raise fastest this year are the ones who walk into a pitch meeting and open a laptop to show a live, working product. Not a Figma mockup (a clickable picture). Not a video demo. A real product investors can actually use. Our 4-week programme puts you in that room with a product investors can click through — and with analytics to show early traction numbers alongside it. If you are exploring no-code MVP development as a faster alternative, we can advise on when that approach makes sense too.
Ready to build?
Let's bring your idea to life. Fast, affordable, and production-ready.
What every Greta startup MVP includes
We do not sell packages with optional extras. Every startup MVP engagement includes the same core pieces — the things every early-stage product needs to be usable, billable, and measurable from day one. Here is what you get, in plain terms.
Core user workflow
We build the one thing your product is actually for — end to end. Not 10 half-built features. One complete journey done properly. Think of it like a recipe: we make sure the main dish is perfect before worrying about the side dishes.
Login & user accounts
Email and password sign-in, plus Google or GitHub login (one click and you are in). Password reset, email verification, and role-based access — so admins see different things than regular users. All secure and standards-compliant.
Stripe billing & subscriptions
Stripe is the payment system used by millions of apps. We connect it so users can pay monthly, pay once, or start a free trial — and manage their own plan without emailing you. From day one, you can actually charge people.
Product analytics (PostHog or Mixpanel)
Analytics tools track what users do inside your app — like a CCTV camera for your product. Every key action tracked from launch. You can see where people drop off, watch session recordings, and show investors real engagement numbers.
Admin panel
A secure internal page only you and your team can see. View all your users, manage subscriptions, check activity logs, and fix issues manually. Essential for early customer support and for showing investors you have operational control.
Investor-ready landing page
A polished public homepage explaining what your product does, how much it costs, and why people should sign up. Ready for your pre-launch announcement and for the link at the bottom of your investor deck.
BUILD IT FAST
Ready to ship your MVP this month?
Book a free 30-minute scoping call and we will map out your core workflow, tech stack, and a fixed price — no obligation, no sales pressure.
TALK TO A FOUNDER
Not sure where to start?
Book a 20-minute call. We'll map out your scope, tech stack, and go-to-market plan — for free.
How Greta builds your startup MVP in 4 weeks
Here is exactly what happens, week by week. No jargon. No surprises. If you want to speak to our team before reading on, that works too.
- 01
Discovery & scope lock (Days 1–3)
We run a focused async discovery session — you fill in a structured brief (takes about 30 minutes), then we hop on a 90-minute call to agree the single most important user action, pick the tech stack, and write down exactly what is in and out of scope. By end of day three you have a signed fixed-price agreement. No vague estimates.
- 02
Design & architecture (Days 4–7)
Our designer draws the screens — first as simple wireframes (like rough pencil sketches), then as polished screens in your brand colours. At the same time, our engineer plans the database (how your data is stored) and the API (the bridge between your front-end app and your back-end data). You review and approve before any real code is written.
- 03
Core engineering sprint (Weeks 2 & 3)
This is the main build. Login, your primary user workflow, Stripe billing, admin panel, and your marketing landing page are all built, connected, and tested. You get a staging URL (a private link to try the real app) at the end of week two so you can review early and share feedback before we finalise.
- 04
Analytics, QA & pre-launch (End of Week 3)
QA means quality assurance — we test everything on desktop and mobile, click every button, try every edge case, and fix what breaks. We also wire up PostHog or Mixpanel so every user action is tracked from the first minute your app goes live. A demo environment with realistic fake data is prepared for investor meetings.
- 05
Production launch & handover (Week 4)
We deploy the app to your own servers (Vercel, AWS, Railway — your choice, your account). We configure uptime monitoring so you get alerted if anything goes wrong. Then we walk your team through the codebase, deployment process, and analytics dashboards in a live session. You get full documentation and 2 weeks of free post-launch support.
Who this is built for
We work best with founders who have a clear idea of the one problem they are solving and the one type of user they are solving it for. You do not need a technical background. You do not need a detailed spec. You just need to know: what is the most important thing my first user should be able to do? We help you refine everything else.
Our approach works especially well for SaaS products (software-as-a-service — apps where users pay a monthly fee) and for founders building their first product from scratch. If you are looking at adding AI features, our AI MVP development service covers LLM integrations — think ChatGPT-style features built into your own product. We also build no-code MVPs for founders who need to validate an idea even faster and with a smaller budget.
If your product needs a custom dashboard — a screen where your users see their data, charts, or reports — that is something we build into every product that needs it. Dashboards are not a separate add-on. They are part of the core workflow when your product is data-driven. Working with a specialist MVP development agency means you get all of this thinking built in from the start — not bolted on later.
How startup MVP options compare — 2026
| Option | Cost | Timeline | Support |
|---|---|---|---|
| Traditional agency | £80,000–£200,000 | 6–12 months | Extra cost |
| Freelancer | £20,000–£60,000 | 3–9 months | You manage it |
| No-code tools | £0–£500/month | Weeks | Very limited |
| Greta | From £10,000 | 4 weeks | Included |
BUILD IT FAST
Stop building in the dark — ship something real
Founders who ship earlier raise more, learn faster, and hire better. Get a fixed-price quote for your MVP in 48 hours.
TALK TO A FOUNDER
Not sure where to start?
Book a 20-minute call. We'll map out your scope, tech stack, and go-to-market plan — for free.
Startup MVP development — frequently asked questions
How long does it really take to build a startup MVP with Greta?+
Four weeks for a focused MVP with one core user workflow, login, Stripe billing, product analytics, and an admin panel. If you need something more complex — multiple user types, custom integrations, or a two-sided marketplace — we scope a longer timeline during discovery. We tell you upfront so you can plan your fundraising timeline around a firm ship date.
What does a startup MVP from Greta cost?+
Startup MVPs start from £10,000 for a four-week engagement covering design, engineering, analytics setup, and launch. More complex products with multiple user types or third-party integrations typically cost £15,000–£25,000. We give you a fixed price after a free 30-minute discovery call — so you always know what you are paying before any work starts.
Will the MVP be good enough to show investors?+
Yes — looking investor-ready is a core design goal, not an afterthought. Every Greta MVP ships with a polished marketing landing page, a live demo environment with realistic seed data, and PostHog or Mixpanel analytics so you can show real engagement numbers. The UI (user interface — what people see on screen) is production quality, not a rough prototype. That makes a big difference to investor confidence.
Do I own the code and infrastructure after the project?+
You own 100% of the codebase, the code repository, and all infrastructure from day one. We deploy everything to your own accounts — Vercel, AWS, Railway, or wherever you prefer — and hand over full access and documentation at launch. No ongoing licensing fees, no lock-in, and no dependency on Greta to keep your product running.
What tech stack does Greta use for startup MVPs?+
We default to a modern, hire-friendly stack: Next.js (TypeScript) on the frontend (what users see), a Node.js or Python backend (the server-side logic), PostgreSQL or Supabase for the database (where your data lives), Stripe for payments, and PostHog or Mixpanel for analytics. We are flexible — if your team already has a preferred setup or you have specific requirements, we adapt. The goal is a codebase your future engineers can start working in immediately.
Sources & further reading
External references cited on this page.
State of European Tech 2024 — Atomico
Annual benchmark report on European startup fundraising, deal sizes, and time-to-product metrics at pre-seed and seed stage.
Startup Genome Global Startup Ecosystem Report
Global analysis of startup success factors, including the correlation between early product velocity and funding outcomes.
Y Combinator — Startup School: How to Build an MVP
Canonical guidance from YC on scoping, building, and shipping a minimum viable product for early-stage founders.
PostHog Product Analytics Documentation
Official PostHog docs covering event tracking, funnels, retention, session replay, and feature flags for early-stage products.
Related services
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SaaS MVP Agency
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AI MVP Development
MVPs powered by LLM integrations, RAG pipelines, and AI-native user experiences.
B2B SaaS MVP Development
B2B products with SSO, role-based permissions, and enterprise-ready onboarding flows.
Mobile App MVP Development
React Native mobile MVPs for iOS and Android, shipped alongside a web admin layer.
Marketplace MVP Development
Two-sided marketplace products with supply/demand management, payments, and reviews.
Your MVP could be live in 4 weeks from now
Stop waiting for the right moment. The founders raising this quarter started building last month. Book a free scoping call and we will have a fixed-price proposal to you within 48 hours — no vague estimates, no surprise invoices.
Free 30-minute discovery call. Real pricing within 48 hours.