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SaaS Development · London

SaaS Development
Company in London

We build SaaS platforms and MVPs for UK startups and SMEs — from initial scoping to production launch. Fixed price, fixed timeline, no scope creep.

London-based team MVPs from 8–12 weeks Fixed-price contracts Security-first builds Full code ownership
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What we build for London SaaS founders

We work with early-stage founders and growing product teams across London and the wider UK. Whether you need a first MVP to validate with users, or a production-grade platform to scale, we scope and build it properly from the start.

MVP Builds

SaaS MVPs

Core user flow, authentication, one primary feature, Stripe payment integration. Enough to get your first paying user without overbuilding.

B2B Platforms

Multi-tenant SaaS

Organisation-level accounts, role-based access, per-seat or usage billing, admin dashboards, and API integrations.

Existing Products

SaaS Upgrades

Refactoring legacy code, adding new features to existing platforms, migrating to better infrastructure, or improving performance.

Integrations

API & Third-party

Stripe, Xero, HubSpot, Slack, SendGrid, Twilio, and custom REST/GraphQL APIs — integrated properly, not bolted on.

How we deliver your SaaS project

Our process is designed to keep scope tight and progress visible. Every stage ends with something concrete — a written spec, a working demo, or a deployed build.

01

Free discovery call (30 min)

We review your idea, existing work, and constraints. We'll tell you if the scope is realistic and flag anything that could add cost or time before we start.

02

Scoping and written proposal

We produce a feature list, technical architecture, fixed price, and delivery schedule. You review, ask questions, and approve before any work begins.

03

Build in two-week sprints

We build iteratively with a shared progress board and a short demo call every two weeks. You see working software from week two — not just at the end.

04

Launch and handover

We handle deployment, write technical documentation, and transfer all code and credentials. Optional: stay on retainer for ongoing development or support.

SaaS development costs in London (2026)

These are realistic ranges based on what we actually build. If an agency quotes £3,000 for a fully featured SaaS product, that's a red flag. If they quote £200,000 before validating a single user, that's also a red flag.

Simple MVP
£8k – £20k
Core user flow, one primary feature, auth, basic admin panel. 8–10 weeks.
B2B SaaS · Most common
£15k – £35k
Multi-role users, Stripe billing, email notifications, API integrations. 10–14 weeks.
Complex Platform
£35k – £70k
Real-time features, custom reporting, mobile app, advanced workflows. 14–20 weeks.

All projects are fixed-price with milestone-based payments. You never pay for overruns caused by our estimates being wrong.

Technology we use for SaaS development

We pick the right tool for your project, not the trendiest one. For most London-based SaaS products, this means:

Backend

Laravel / Django / Node

Proven frameworks with large UK talent pools. Your codebase is maintainable after we hand it over.

Frontend

React / Vue / Next.js

Fast, component-based UIs. We build accessible, responsive interfaces that work on all devices.

Infrastructure

AWS / Render / Railway

Managed cloud deployments that scale with your user base. No over-engineering at MVP stage.

Payments

Stripe

Subscriptions, usage billing, invoicing, and per-seat pricing — all handled through Stripe's UK-supported API.

For a deeper look at our SaaS development approach, see our guide on how UK startups can build a SaaS MVP without overspending.

Frequently asked questions

How long does it take to build a SaaS MVP in London?
A well-scoped SaaS MVP typically takes 8–12 weeks from kickoff to production launch. This covers user authentication, the core feature that delivers your value, Stripe payment integration, and basic account management. We give you a fixed timeline in writing before any work starts.
How much does SaaS development cost in London?
A focused MVP costs £8,000–£20,000. A B2B SaaS with multi-role users, billing, and email workflows typically runs £15,000–£35,000. More complex platforms with real-time features or mobile companions are £35,000–£70,000. We're transparent about costs from the first call.
Do you work with pre-funded or bootstrapped startups?
Yes. Many of our clients are pre-seed or self-funded. We specialise in lean MVP builds that let founders validate their idea without burning runway. If your budget is tight, we'll help you cut scope sensibly — not quality.
What technology stack do you use for SaaS projects?
For most UK SaaS products we use a Laravel or Django backend with a React or Vue frontend. These are mature frameworks with large UK talent pools, which means your codebase is maintainable and future hires are easier to find.
Do we own the code after the project is complete?
Yes, absolutely. You own 100% of the code, database schemas, infrastructure configs, and all other deliverables. We hand over full access to all repositories and services. There are no ongoing licence fees or vendor lock-in.

Ready to build your SaaS product?

Book a free 30-minute discovery call. We'll review your scope, give you an honest cost estimate, and tell you exactly what it'll take to build and launch.

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