Foundry 5 is a SaaS development UK partner for founders scaling past the MVP. We reduce your risk and strengthen your team, building the multi-tenancy, security, and reliability enterprise customers demand before they will sign.
Whether you are launching from an idea or scaling a product with real customers, we bring the experience to de-risk it. We have built and scaled platforms for UK founders, including Gather, Sinq, and Loom.
From
6-12 wks
idea to first live release
Always
100%
code ownership. It's yours.
Included
30 days
post-launch support
Shipping screens is the easy part. We do SaaS development UK enterprise buyers will actually approve: by blending deep domain expertise with hands-on delivery, we make sure your platform scales cleanly, survives a security review, and leaves your internal team stronger than we found them.
Senior engineers and product leads on your product, not a rotating cast of juniors. The people who scope it are the people who build it.
We document architecture and decisions as we build, so when a customer sends a security questionnaire, the answers already exist.
Real SaaS development UK experience with multi-tenancy, billing, SSO, and the integrations a SaaS product lives or dies on.
Product, engineering, and growth working from the same plan, so features ship without the usual rework.
Architecture that holds from your first ten users to your first enterprise contract, without a rebuild every time you grow.
Clean, documented handovers that leave your team able to own, run, and extend what we built.
Sinq needed to replace spreadsheets and disconnected tools with one platform for construction quotations, variations, approvals, and project finances. We built it as a multi-user product from the start, with role-based access, real-time data syncing, and integration points for existing accounting systems, then rolled it out to pilot contractors on live sites.
SaaS teams typically bring in a SaaS development UK partner when the technical decision has to be right the first time, and there is no appetite for finding out later that it was not.
The deal that changes your year arrives with a security questionnaire. SSO, SOC 2, audit logs, data residency. You need a team that has answered those before, not one learning on your contract.
The MVP or no-code stack that got you here starts buckling under real load. We modernise the foundation without taking the product offline.
When uptime is your SLA and your reputation, you need software built to stay up, and to fail safely when something breaks.
Scaling users, data, and features, or heading into due diligence, needs architecture that holds up to load and to scrutiny.
Founder at Seconddate
Foundry 5 really impressed me with their work on my AI-powered dating app. They nailed the UI/UX, starting with core app screens and then translating that vision to the web. The React site they built is sleek and polished - exactly what I was hoping for. What I appreciated most was their thoughtful approach and how easy they were to work with. They got the job done without needing me to micromanage.
CEO at StreaksAI
Foundry 5 surpassed all expectations in delivering our web development product swiftly and flawlessly. Their speed and eye for detail, especially under tight time constraints, showcase their commitment to excellence.
CEO, Xcelsior Capital
Working with Foundry 5 has been a great experience from start to finish. They seamlessly translated our vision into a website that not only showcases our brand and operations but also enhances our online presence as an investor in natural resources. Nothing was too much for them and they always put the client first.
CEO of Ove
Working with Foundry 5 to create the Ove app has been an absolute pleasure. Their professionalism, work ethic, and willingness to always go the extra mile has really impressed me. I would recommend them to anyone.
Loom Founder
Foundry 5 have gone above and beyond to bring my vision of Loom to life. Not only this, but they continue to be an integral part of our team. They are lovely people to work with, and I recommend them to anyone looking for a software partner. Particularly for non-technical tech founders (like me!) who need to ensure that their business is in safe hands.
Chief Product Officer Gather
The team has been instrumental in driving both the design and development of Gather, pairing a proactive, highly responsive workflow with the technical depth needed to handle our platform's complexity. Their partnership continues to move the product forward in a reliable and impactful way.
Book a 30-minute discovery call. No pitch. We will tell you honestly whether your SaaS development UK project is ready to build or scale, what it would take, and where the risks are, whether you are starting from an idea or pushing a live product to its next stage.