Turn your ideas or passion into reality — with By Design UK

SaaS Development

From a first MVP to enterprise multi-tenant platforms. Every build is fixed price, AI-accelerated and delivered with the complete source code in your name.

Fixed price  ·  AI-accelerated build  ·  Full source code ownership  ·  UK-based, Enfield EN3  ·  No agency markup

Software Platforms

SaaS Build Tiers

Choose the scale that matches your roadmap — every tier includes discovery, UX design, build, testing, launch and handover.

What is SaaS? SaaS is what you already use and know every day — Spotify (music you stream, not buy), Netflix (films on subscription), an ebook app like Kindle, Duolingo (language lessons), your online banking app, Uber or Deliveroo (a service booked through an app), Canva (design tools online). All of these are “Software as a Service” — customers log in and pay monthly instead of buying a one-off product. We build the next one of these for your idea or industry, and you own the platform outright.

Starter MVP SaaS Build

£18,000 – £60,000

Validate your idea with a production-ready MVP.

  • Core user flows, auth and billing (Stripe)
  • Admin dashboard
  • Launch on Netlify + Supabase or your stack

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Launch SaaS Build

£44,997 – £105,000

Market-ready platform with polished UX.

  • Multi-role users and permissions
  • Integrations and API
  • Analytics and onboarding flows

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Growth SaaS Build

£64,997 – £155,000

Scale features, automation and team workflows.

  • Multi-tenant architecture
  • AI-powered features
  • Advanced reporting

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Scale SaaS Build

£119,997 – £270,000

High-volume platforms with complex operations.

  • Microservices where justified
  • Enterprise SSO and audit logs
  • Performance engineering

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Complex Operations SaaS

£199,997 – £430,000

Mission-critical systems for regulated or high-throughput sectors.

Enterprise Custom SaaS

£349,997 – £650,000+

Bespoke enterprise platforms with dedicated senior team.

How a fixed-price SaaS build works

  1. Discovery & scoping — we map every feature, user role and integration into a fixed scope and price.
  2. Design — clickable prototype you approve before code is written.
  3. AI-accelerated build — senior engineers using AI tooling deliver in weeks, not quarters.
  4. Test, launch, handover — full source code, documentation and a support plan if you want one.

Frequently Asked Questions

Do I own the code?

Yes — 100%. The repository is transferred to your own GitHub organisation at handover.

What stack do you use?

React or Next.js front-ends, Supabase or Node/Postgres back-ends, Stripe billing, Netlify or cloud hosting — or your preferred stack.

How long does an MVP take?

Typically 6–12 weeks from approved design, depending on scope.

Can you add features after launch?

Yes — via a support plan or a fixed-price phase two.

Ready to scope your platform? Tell us what you’re building and we’ll send a fixed-price proposal.

Contact Us

Project Enquiry

Tell us what you need — we'll come back with a quote within 24 hours.

We aim to respond within 24 hours. For urgent enquiries email us directly at info@bydesignuk.co.uk

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Thank you for your enquiry. We'll review your requirements and come back to you with a proposal within 24 hours.

Request a Callback

Leave your details and we'll call you back at a time that suits you.

We operate Monday – Friday, 9am – 6pm. Callbacks are typically made within 2 hours during business hours.

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We've received your request and will call you back at your preferred time. If it's urgent, email us at info@bydesignuk.co.uk