By Design UK builds production-grade SaaS platforms using React, Supabase and Netlify — a modern, cost-efficient stack that lets us ship faster than a traditional agency while giving founders far more reliability than a solo freelancer. We work on fixed prices, use AI-accelerated development workflows to compress build timelines without cutting corners, and hand over full source code ownership at the end of every project. No lock-in, no vague retainers, no black-box billing.
This stack is our default recommendation for early-stage and scaling SaaS businesses because it balances speed, cost and long-term flexibility. React gives you a fast, maintainable front end. Supabase provides a Postgres-backed database, authentication and storage without the overhead of building bespoke backend infrastructure from scratch. Netlify handles deployment, CI/CD and edge delivery so your product is live, fast and globally distributed from day one. Together, they let a lean UK-based team deliver what used to require a much larger, much slower build.
Costs vary depending on complexity, integrations and scope, but our SaaS development engagements typically range from £18,000 for a focused MVP through to £650,000+ for enterprise-grade, multi-module platforms with advanced permissions, billing logic and third-party integrations. Every quote is fixed before development begins, so you know the total cost upfront — not an hourly estimate that creeps as the project drags on. If your product idea sits closer to ecommerce than SaaS, our Shopify build services start from £499 and scale up to £18,999 depending on customisation depth.
Freelancers are often cheaper on paper, but reliability is the real cost — availability gaps, inconsistent code quality, and projects that stall when a single contractor moves on. Traditional agencies solve the reliability problem but introduce new ones: slow processes, layers of account management, opaque day-rate pricing, and contracts that can leave you without full rights to your own codebase. By Design UK sits deliberately between the two. You get a dedicated, experienced UK team, a fixed price agreed before work starts, and complete ownership of your source code once the project is delivered — no ongoing dependency unless you choose our support plans.
Our AI-accelerated workflow means routine scaffolding, testing and boilerplate generation are handled faster than manual agency processes typically allow, while senior developers focus on architecture, business logic and the decisions that actually determine whether your SaaS scales cleanly. That combination is how we keep fixed prices realistic without inflating timelines.
Rather than ask you to take our word for it, we point to Tackly.co.uk — a live, multi-toolkit SaaS platform we designed, built and continue to operate ourselves. It’s running the same React, Supabase and Netlify approach we recommend to clients, handling real users, real authentication flows and real infrastructure decisions in production. Building and maintaining our own SaaS product means we understand the operational realities of what we ship — not just the theory of it. Combined with our UK base, fixed-price model and full code ownership guarantee, it’s a concrete demonstration of what a build for your business could look like.
Every engagement starts with a scoping conversation so we can map your requirements against the right architecture before any pricing is confirmed. You can read more about our approach and team on our about page, or get in touch directly via our contact page to discuss your project.
This stack dramatically reduces the time needed to build authentication, database and hosting infrastructure, which lowers your total build cost without sacrificing scalability. Supabase in particular removes months of backend work that would otherwise need to be built and maintained manually.
Yes. Full source code ownership is transferred to you on delivery for every SaaS build, with no licensing restrictions or ongoing dependency on By Design UK unless you opt into a support plan.
Timelines depend on scope, but AI-accelerated development typically allows a focused MVP to move from scoping to launch considerably faster than a traditional agency process, while still going through proper architecture and testing stages.
Clients can move onto a monthly support plan starting from £797 for SaaS products, covering monitoring, updates and ongoing development, or manage the codebase independently since you retain full ownership.
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