Custom software or off the shelf? When building is worth it — and when it isn't
Most businesses should buy far more software than they build. The skill is recognising the small number of places where building your own genuinely pays off.
Software development consultancy
Digital products,engineered for growth.
Kisatrix is a software development consultancy helping ambitious businesses design, build and scale reliable digital products — from the first architecture diagram to production and beyond.
- End to endStrategy, design, engineering and cloud in one team.
- You own itCode, designs and infrastructure in your accounts from day one.
- Built to lastTested, documented and built on mainstream technology.
- UK-basedWorking with clients in the UK and internationally.
Built on platforms we trust
From product strategy to production.
One team covering every discipline a serious software product needs — so nothing falls between suppliers.
Product strategy
Discovery, scoping and roadmaps that tie software to business goals.
Product design
Research-led UX and interface design, tested before it is built.
Full-stack engineering
Web, mobile and backend systems, written to be maintained.
AI & automation
Agents, retrieval and workflow automation with human oversight.
Cloud & infrastructure
Infrastructure as code, CI/CD, monitoring and cost control.
Support & evolution
Ongoing improvement after launch, or a clean handover to your team.
We design and engineer software around the way your business actually works — then take responsibility for running it well.
Most expensive software mistakes happen before a line of code is written. We start at the whiteboard, with the people who do the work.
Business before technology
We start with how the work happens today and what has to change. The technology follows from that — not the other way round.
Engineered to be owned
Clear architecture, tests, documentation and a codebase you own outright. Software your next developer can pick up.
One accountable team
Strategy, design, engineering and infrastructure in one team, so responsibility for the outcome never falls between suppliers.
What we build.
Custom Software Development
Bespoke business systems, internal platforms and workflow tools designed around your processes and owned outright by you.Your operations run on software that fits the work, not the other way round.TypeScriptNode.jsReactNext.jsPythonWeb Application Development
Customer-facing platforms, dashboards and portals built with React, Next.js and TypeScript.A web application your users rely on and your team can keep improving with confidence.Next.jsReactTypeScriptNode.jsPostgreSQLMobile App Development
Cross-platform iOS and Android apps built with Flutter, with the backend services and release process to support them.A dependable app on both platforms, without the cost of maintaining two separate codebases.FlutterFirebaseSupabaseNode.jsTypeScriptSaaS Development
Multi-tenant SaaS platforms with subscriptions, team accounts and an architecture that grows with your customer base.A product you can sell with confidence and keep developing as the business grows.Next.jsTypeScriptNode.jsPostgreSQLStripeAI Development & Automation
LLM-powered features, AI agents and document automation built on Claude and OpenAI, designed for dependable production use.Repetitive, judgement-light work is handled by software, and your people spend their time where it counts.ClaudeOpenAILangChainPythonPostgreSQLAPIs & Integrations
Custom APIs and system integrations that connect CRMs, ERPs, payment providers and internal tools.Your systems share accurate data without anyone copying it between them.Node.jsTypeScriptPythonGraphQLPostgreSQLUI/UX & Product Design
User research, prototyping, interface design and design systems for web and mobile products.Software that people understand quickly and use without needing to be trained.ReactNext.jsTypeScriptFlutterCloud & DevOps
Cloud architecture, infrastructure as code, CI/CD pipelines, monitoring and cloud cost optimisation.Your team ships changes confidently, and the infrastructure costs what it should.AWSGoogle CloudMicrosoft AzureTerraformDocker
How we work with clients.
Every engagement is shaped around the problem. Most take one of three forms.
Product build
You have a product or system to create and want one team accountable for it. We take a product from discovery to launch with a dedicated team — strategy, design, engineering and infrastructure — and stay on to support and evolve it.
Embedded engineering
You have a product team and need more senior capacity or specialist skills. Our engineers join your team, work in your tools and follow your process, with the aim of leaving your codebase and your team stronger.
Modernisation
An existing system is slowing the business down, but it can't simply be switched off. We map the system, stabilise it, and replace it piece by piece — keeping the business running throughout.
Software shaped by the constraints of your sector.
Startups & Scale-ups
MVPs and platforms built to survive growth
Ecommerce & Retail
Fast storefronts, integrations and retail operations tooling
Fintech & Financial Services
Secure, auditable software for regulated financial products
Healthcare & Health Tech
Clinically safe, interoperable software for health and care
Logistics & Supply Chain
Tracking, field apps and integrations for moving goods
Professional Services
Client portals and workflow tools for advisory firms
A practical path from idea to production.
- DiscoverUnderstand the business, the users and what success looks like.
- DefineRequirements, architecture, scope and a roadmap you can plan around.
- DesignThe product experience, tested before it is expensive to change.
- BuildEngineering in short cycles, with working software to review every sprint.
- LaunchTesting, deployment and making sure it holds up in production.
- EvolveSupport, improvement and scaling once real usage starts.
A modern stack, chosen to last.
We choose established, well-supported tools, so your product is easy to hire for, maintain and extend.
- React
- Next.js
- TypeScript
- Node.js
- Python
- Flutter
- React Native
- PostgreSQL
- MongoDB
- Redis
- GraphQL
- Claude
- OpenAI
- LangChain
- AWS
- Google Cloud
- Microsoft Azure
- Docker
- Kubernetes
- Terraform
- Stripe
Engineering thinking, written down.
How to scope a software project before you ask for quotes
Vague briefs produce quotes that cannot be compared. A few days of structured thinking before you contact suppliers will save weeks of confusion later.
What it takes to put an AI agent into production
An agent that works in a demo is a long way from one you can trust with real customers and real systems. Here is what closes the gap.
Have a product worth building?
Tell us what you are trying to achieve. The first conversation is about understanding the problem — not selling you a solution.