Digital One Agency builds production online marketplaces, two-sided platforms, directories and membership platforms for UK founders. We are a senior, founder-led engineering team headquartered on the Gold Coast (Australia) with active UK clients in London, Manchester and Edinburgh. We do not sell pre-built marketplace SaaS — we build bespoke code you own.
Typical UK marketplace builds range from £28,000 to £180,000, delivered in 12–28 weeks. We invoice in GBP, are UK-VAT compliant, and integrate with UK-relevant payments (Stripe Connect UK, Open Banking, BACS).
What We Build for UK Marketplace Founders
- Multi-vendor marketplaces — vendor onboarding, KYC/AML, listing management, search & discovery, ratings & reviews, dispute resolution, payouts.
- Two-sided platforms — buyer/seller, client/provider, employer/jobseeker, landlord/tenant, learner/instructor.
- Directory websites — premium listings, claim-your-listing, lead routing, paid placements, featured listings, category taxonomy.
- Membership platforms — paid memberships, gated content, community features, recurring billing, member directories.
- Stripe Connect integration — Standard, Express or Custom Connected Accounts; instant payouts, escrow, split payments, multi-currency.
- AI-powered marketplaces — semantic search, AI matching, auto-categorisation, AI moderation, conversational discovery.
Where We Deliver Marketplace in the UK
Our UK marketplace clients are based in London, Manchester, Edinburgh, Birmingham, Bristol and Leeds. We have shipped marketplaces across legal services, property, recruitment, professional services, e-commerce, and trades. Each one is bespoke code, not a Sharetribe / Marketplacer / Kreezalid template.
Why UK Marketplace Founders Choose Digital One Agency
- Senior engineering from day one — we have shipped marketplaces with real GMV, not just demos.
- You own the code — bespoke build means no per-vendor licence fees, no platform tax, full freedom to pivot.
- Fixed-scope quotes, milestone-billed. No hourly billing, no scope creep.
- UK-native delivery — Stripe Connect UK, Open Banking, GDPR/ICO compliant, GBP invoicing.
- End-to-end — strategy → architecture → build → launch → optimisation.
UK Marketplace Pricing (Typical Ranges)
- Discovery / scoping engagement: £3,000 – £6,000 (2–3 weeks)
- MVP marketplace (single category, web only): £28,000 – £55,000 (10–16 weeks)
- Full multi-vendor marketplace: £55,000 – £120,000 (14–22 weeks)
- Marketplace + native mobile apps: £80,000 – £180,000 (18–28 weeks)
- Directory website (custom): £18,000 – £45,000 (8–14 weeks)
- Membership platform: £20,000 – £60,000 (8–16 weeks)
- Optimisation retainer (post-launch): £2,000 – £8,000/month
Our UK Marketplace Engagement Process
- Free 30-minute discovery call — we scope the marketplace, identify the right architectural pattern (web-only vs mobile-first), and tell you whether you should build now or validate first.
- Fixed-fee discovery (£3,000–£6,000, 2–3 weeks) — wireframes, technical spec, payments architecture, fixed-scope quote.
- Build phase (10–28 weeks) — milestone billing, weekly demos, your team has staging access from week 2.
- Launch + payments setup — Stripe Connect onboarding, KYC vendor verification, payout configuration.
- Post-launch optimisation — conversion tracking, vendor onboarding flow tuning, dispute process refinement.
Tech Stack We Use for UK Marketplaces
- Backend: Node.js (NestJS, Express), Python (Django, FastAPI), Go, PHP (custom Laravel where appropriate)
- Frontend: Next.js, React, TypeScript, Tailwind
- Mobile: Flutter, React Native, Swift, Kotlin (when marketplace needs apps)
- Payments: Stripe Connect (UK), Open Banking, GoCardless, BACS, Apple Pay, Google Pay
- Search: Algolia, Typesense, Meilisearch, OpenSearch
- Database: PostgreSQL, MySQL, Redis, pgvector for AI search
- Infra: AWS, GCP, Cloudflare, Vercel, Heroku
- AI integration: Claude, GPT-5, Gemini, semantic search, AI moderation
Get a Custom Quote — Free 30-Minute Discovery Call
If you are a UK founder building a marketplace, two-sided platform, directory or membership site — talk to us before you commit. The 30-minute call is free, the scoping engagement gives you wireframes and a fixed quote, and you keep the spec.
- Senior engineer on the call from minute one
- Fixed-scope quote with milestone billing
- UK marketplace references on request
- Bespoke code you own — no platform tax, no per-vendor fees