SaaS Development Company

The gap between “an app several companies use” and “a SaaS product” is mostly invisible from the outside. It is tenant isolation that holds under pressure, billing that handles the awkward cases — mid-cycle upgrades, failed payments, refunds — onboarding that works without a human, and enough internal tooling that support does not require a developer with database access.

What we build

• Multi-tenant architecture with isolation appropriate to how sensitive the data is.
• Subscription billing on Stripe — plans, trials, proration, dunning and the failed-payment flow most products get wrong.
• Self-service onboarding, since sales-assisted onboarding does not scale with a low price point.
• Internal admin tooling so support can act without a developer.
• Usage analytics that show which features earn their maintenance.
• Infrastructure that scales with tenants rather than with hope.

Choosing a tenancy model

Frequently asked questions

How much does it cost to build a SaaS product?

A focused first version typically £30,000–£80,000; a product with real multi-tenancy, billing and admin tooling usually £70,000–£150,000. Billing and tenancy are the lines most often underestimated because they look like solved problems until you meet the edge cases.

Should we use Stripe or build billing ourselves?

Stripe, essentially always. Billing is a deep problem — tax, proration, dunning, refunds, compliance — and building it is a product in itself. The integration work is real but a fraction of the alternative.

Can you take over an existing SaaS product?

Yes. It starts with an audit of tenancy and billing specifically, because those are where inherited products most often carry risk that is invisible until it is urgent.

Do we need Kubernetes to scale?

Almost certainly not at the start. Managed container services or straightforward virtual machines carry most SaaS products a long way, at a fraction of the operational cost. Scale when the load exists, not in anticipation of it.

How the engagement runs

• Scoping call, then discovery. We establish what you actually need before quoting. You approve scope before we write a line of code.
• Fixed price or capped time and materials. Tightly specified work suits a fixed price; genuinely new work suits a capped retainer. We recommend one rather than offering both and letting you guess.
• Weekly demos. You see working software every week, so nothing surprising turns up at the end.
• You own everything. Repositories, infrastructure and documentation transfer to you on payment. No vendor lock-in, no licensing you do not control.
• NDA as standard, usually before the first detailed call. We will often send one ourselves if you do not.

If you are planning work of this kind and want a straight assessment of scope, timeline and cost, tell us what you are building. We work with clients across the UK, EU and US.