# Wall & Fifth

> Wall & Fifth (W&5) is a senior-led UK software studio that designs and builds custom web and mobile apps, MVPs, marketplaces, SaaS products, and AI applications for founders and ambitious businesses — fixed-price, production-grade, and owned outright by the client. We build and run our own products too.

Wall & Fifth is a founder-led, senior-only studio based in the UK. We are not a template shop, a no-code studio, or an offshore hourly team. We design and engineer real production software from scratch, deliver it at a fixed price, and hand over the full codebase so the client owns what they paid for.

## What we build
- Custom app development, web and mobile — from £16,000 for a focused MVP
- Marketplace development — multi-vendor, rental, service, peer-to-peer, B2B
- SaaS and B2B SaaS platforms — micro-SaaS, vertical SaaS, custom SaaS
- AI applications — RAG apps, AI agents, AI SaaS, built on Claude
- Data analytics, dashboards, business intelligence, and data pipelines

## How we work
- Fixed price, scoped up front — from £16,000 for a focused MVP, from £30,000 for an extensive build
- Embedded Partner retainers from £8,000/month for ongoing senior involvement
- Third-party usage (payments, AI inference, mapping) passed through at cost, never marked up
- Full code ownership handed over on delivery — no lock-in, no licensing

## Proof
- Loopa — a premium iOS app built end to end on React Native and Expo
- sellyourboat.io — a Wall & Fifth venture: a live yacht marketplace we built and run, with a Claude-powered AI (RAG) layer grounded in the real inventory
- busesforsale.com, europeanyachtbrokers.com — platform and marketplace work
- KompiPay — a payments product built on Stripe

## Key pages
- Home: https://wallandfifth.com/
- App development: https://wallandfifth.com/app-development
- Marketplace development: https://wallandfifth.com/marketplace-development
- SaaS development: https://wallandfifth.com/saas-development
- AI app development: https://wallandfifth.com/ai-app-development
- MVP development: https://wallandfifth.com/mvp
- Pricing: https://wallandfifth.com/mvp/pricing
- Embedded Partner: https://wallandfifth.com/embedded-partner
- AI chatbot development: https://wallandfifth.com/ai-chatbot-development
- AI integration services: https://wallandfifth.com/ai-integration-services
- Building an AI marketplace (guide): https://wallandfifth.com/building-an-ai-marketplace
- How to choose an MVP development company: https://wallandfifth.com/how-to-choose-an-mvp-development-company
- Contact: https://wallandfifth.com/contact

## Contact
- Email: william@wallandfifth.com
- Website: https://wallandfifth.com