Launch your marketplace in 5 weeks, not 12 months
Building a two-sided platform — a place where buyers and sellers meet — is one of the hardest things to build in tech. You need buyer flows, seller sign-up, split payments, and safety tools. Our MVP development agency handles all of it in a single 5-week sprint, from £12,000.
Think of an MVP like a first pancake to test a recipe. You are not building the full restaurant on day one. You build the simplest version that real people can use — and Greta does that for marketplaces. Whether you are building a services marketplace, a rental platform, a B2B buying hub, or a peer-to-peer goods exchange, we have shipped this architecture before. You get a real codebase, Stripe Connect payouts, and a moderation toolkit — ready for your first hundred sellers on day one.
5 weeks
Delivery timeline
Stripe Connect
Split payments & payouts
Two-sided
Buyers + sellers
£12k
Starting price
Why marketplace MVPs are harder than regular apps
A marketplace is not a shop with extra sellers added on. It is a completely different kind of product. You have 2 distinct user types — buyers and sellers — each with their own sign-up journey, their own dashboard (think of it as a personal control panel), their own goals, and their own support needs. You also have payments that do not just collect money. They split it: some goes to your platform, some goes to each seller, in real time, automatically. On top of that, you have a trust problem. Buyers cannot touch or inspect goods before paying. Every design choice you make either builds or destroys their confidence in your platform.
Most agencies miss this. They quote you for a basic ecommerce build, then realise halfway through that the seller dashboard alone is a full product in its own right. So the timeline doubles, and so does the budget. We have built enough two-sided platforms to know exactly where the hard parts are. Our 5-week sprint is designed specifically for the marketplace case. Dual sign-up, Stripe Connect, moderation, and search are all first-class deliverables — not things we add at the end.
The cold-start problem is real too. That is the chicken-and-egg puzzle: you need sellers to attract buyers, but you need buyers to attract sellers. Launching with a platform that confuses sellers means thin supply. Thin supply means a bad buyer experience. A bad buyer experience means no sales. Getting the seller onboarding right in week one is a growth move, not just a design nicety. That is why we spend extra time on the seller side of every marketplace we build. Want to understand what what a minimum viable product really means before we start? We are happy to walk you through it.
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What is included in a Greta marketplace MVP
Every marketplace build ships with 6 core areas. These are not optional extras — they are the bare minimum a two-sided platform needs to actually sign up and keep both sides of the market. Think of them as the 6 rooms every marketplace house must have before you invite guests in.
Buyer and seller onboarding flows
Separate sign-up journeys built for each user type. Sellers fill out a step-by-step profile — business details, category selection, profile photo, bank details for payouts — before their first listing goes live. Buyers get a quick sign-up with extra profile steps triggered only when they make their first purchase.
Listing creation with search and filtering
Sellers get a guided listing wizard (like a smart form) with category-specific fields, photo upload, pricing options, and draft/published states. Buyers get a faceted search interface — think of it like the filters on Amazon — with real-time filtering, keyword search, price sliders, location radius, and saved search alerts.
Stripe Connect split payments and payouts
End-to-end payment plumbing using Stripe Connect. The platform collects money at checkout, holds it briefly during any dispute window, takes a platform fee you set, and sends the rest to each seller on a weekly or custom schedule. Stripe handles the security compliance and international currency support — so you do not have to.
Review and rating system
After each transaction, buyers are prompted to rate their seller on experience, quality, and communication. Sellers can leave buyer ratings too. Review scores appear on listing and seller profile pages with a verified purchase badge. High ratings feed into search ranking — so your best sellers naturally rise to the top.
In-platform messaging
A messaging thread between buyer and seller, tied to a specific listing or order. Keeping chat on your platform protects your data, helps with disputes, and stops people from taking transactions off your platform. Threads are visible from both user dashboards and linked to order records in your admin panel.
Trust and safety moderation tools
An admin dashboard (your team's control room) for reviewing flagged listings, suspending accounts, managing disputes, and checking platform health. Buyers and sellers can report listings or users directly. You can also set new listings to go through manual review during the early growth phase — a safety net while you build trust.
BUILD IT FAST
Ready to launch your two-sided platform?
Tell us about your marketplace concept and we will scope it in a free 30-minute call. Most founders leave with a clear build plan and a fixed-price quote.
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.
Our 5-week marketplace build process
We work in short focused chunks called sprints — like chapters in a book. Each week has a clear goal, so you always know exactly where your build stands. Here is what happens each week when you build your MVP with our agency.
- 01
Discovery and platform architecture (Week 1)
We run a structured discovery session to map your two-sided model: who lists, who buys, how the transaction flows, what fee structure you want, and what trust mechanisms your sector needs. We produce a data model (the blueprint for how information is stored), an API contract (the rulebook for how different parts of the app talk to each other), and a component map so all 5 weeks of build are aligned from day one.
- 02
Dual onboarding and identity flows (Week 2)
We build separate buyer and seller sign-up, profile setup, and Stripe Connect account creation — then test them. We set up your category structure and listing attribute schema (the specific fields each listing type needs). Email verification, password reset, and basic notification emails are all wired up.
- 03
Listings engine and buyer search (Week 3)
The full listing creation wizard for sellers and the search and listing detail pages for buyers are built this week. We connect image upload and cloud storage, set up search indexing for fast results, and wire up the seller dashboard with listing management and basic analytics.
- 04
Payments, checkout, and messaging (Week 4)
Stripe Connect payment flows go in: buyer checkout, platform fee split, escrow hold (a brief hold on funds while the buyer confirms delivery), and seller payout scheduling. In-platform messaging threads are built. Order management screens for both buyer and seller dashboards go live. Post-transaction review prompts are triggered on order completion.
- 05
Trust and safety, QA, and launch (Week 5)
Admin moderation tools, report flows, and dispute escalation paths are built. We run end-to-end QA (quality assurance — testing every user journey from sign-up to payout) on desktop and mobile. Performance and security checks are completed. We support your team through deployment to production and stay available for the first week after launch.
Marketplace verticals we specialise in
The core marketplace architecture — dual onboarding, split payments, search, reviews — is the same across most verticals. But each sector has its own quirks. A food marketplace needs delivery windows and order tracking. That is different from foodtech MVP development, which often involves kitchen management and supplier coordination too. A rental platform needs availability calendars and deposit handling. A B2B procurement hub needs purchase order workflows and invoice generation.
We adapt the listing schema, booking or purchase flows, and trust mechanisms to fit your specific niche. If your marketplace involves physical delivery, logistics MVP development is something we also handle — from carrier integrations to real-time tracking widgets. If your marketplace is primarily a mobile app MVP, we build iOS and Android versions alongside the web platform in the same sprint.
Not sure exactly which category your idea fits? That is fine. Most marketplace ideas sit between two or three verticals. We help you figure out the right shape for your product in our discovery week — at no extra cost. Just book a free call with our team and we will work through it together.
How Greta compares to your other options — 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 £12,000 | 5 weeks | Included |
BUILD IT FAST
Your marketplace deserves more than a template
No-code tools cap your growth and lock you into monthly fees. Greta builds you a custom, scalable codebase you own outright — with the two-sided architecture to handle real supply and demand from day one.
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.
Why no-code tools are not enough for a real marketplace
No-code tools like Bubble or Sharetribe are a great way to test an idea on a tiny budget. But they hit a ceiling fast. Most cannot handle custom Stripe Connect split logic. Search performance degrades quickly above a few hundred listings. Customising the seller onboarding beyond a template is hard or impossible. And you end up paying monthly platform fees forever — for a product you do not own.
A custom-built marketplace from our MVP agency gives you a codebase you own outright. No platform lock-in. No monthly fee growing with your user count. You can add any feature, connect any third-party tool, and scale to hundreds of thousands of listings without rebuilding from scratch. Think of it like renting versus buying a house — the upfront cost is higher, but you own it and you can renovate it however you want.
If you have already validated your idea with a no-code tool and you are ready to build the real thing, we can help you migrate. We have taken ideas from Bubble prototypes and turned them into production-grade platforms in 5 weeks. Just get started today and tell us where you are starting from.
Frequently asked questions about marketplace MVP development
How long does it take to build a marketplace MVP?+
Greta delivers marketplace MVPs in 5 weeks. Week 1 covers discovery and architecture. Weeks 2–3 build the core dual-sided flows and listings engine. Week 4 integrates Stripe Connect and messaging. Week 5 covers trust and safety tools, QA, and launch preparation.
How much does a marketplace MVP cost?+
Marketplace MVPs at Greta start from £12,000. The exact price depends on the complexity of your vertical, whether you need KYC/KYB identity checks (ID verification for sellers), the number of listing attributes, and any custom commission logic. Most clients land between £12,000 and £22,000 for a launch-ready product.
Do you handle Stripe Connect setup for marketplace payouts?+
Yes. Stripe Connect is our default payments layer for all marketplace builds. We configure Express or Custom accounts for sellers, set up platform fee splits, handle currency and payout scheduling, and integrate Stripe's dispute and refund flows into your admin dashboard.
Can you build a marketplace for a specific niche — services, rentals, or B2B?+
Absolutely. We have built marketplaces for service providers, physical and digital goods, short-term rentals, and B2B procurement. The core architecture is the same; we adapt listing schemas, booking or purchase flows, and trust mechanisms to fit your specific niche.
What is the difference between a marketplace and an ecommerce store?+
An ecommerce store has a single seller (you). A marketplace connects multiple third-party sellers with buyers — meaning you need a two-sided onboarding system, split-payment infrastructure, seller dashboards, and trust and safety mechanisms to manage third-party supply. This added complexity is why we specialise in marketplace architecture separately from standard ecommerce.
Sources & further reading
External references cited on this page.
Stripe Connect documentation
Official Stripe guide to split payments, platform fees, and seller payouts for marketplace platforms.
Andreessen Horowitz — a16z marketplace playbook
Research on marketplace liquidity, cold-start strategies, and trust mechanisms for two-sided platforms.
UK Competition and Markets Authority — platforms and marketplaces
CMA guidance on digital platform regulation and seller obligations in the UK, updated 2024.
PYMNTS — global marketplace economy report
Data on marketplace transaction volume, platform fee benchmarks, and two-sided network effects by sector.
Related services
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Ecommerce MVP Development
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SaaS MVP Agency
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Fintech MVP Development
Payment-heavy and financial products with compliance baked in.
Mobile App MVP Development
iOS and Android marketplace apps for mobile-first audiences.
Startup MVP Development
End-to-end build support for early-stage founders.
Your two-sided platform. Live in 5 weeks.
Stop spending months on architecture decisions and vendor pitches. Greta has built the two-sided infrastructure before — buyer onboarding, seller dashboards, Stripe Connect, search, reviews, messaging, and moderation. You bring the idea and the vertical. We bring the build. If you are still figuring out what an MVP is and whether it is right for you, we can walk you through that in the first call too.
Free 30-minute discovery call. Real pricing within 48 hours.