A small, senior team building the websites and internal tools that growing businesses actually run on. You talk to the people writing the code, every week.
Fixed price agreed upfront. First working demo in 2 weeks.
In short
Bespoke software development is the practice of building custom software applications tailored to a specific business’s processes, rather than configuring off-the-shelf SaaS products. For UK SMEs with 10 to 250 employees, ajairu.dev delivers fixed-price system integrations from £8,000, bespoke platform builds from £25,000, and ERP and SaaS replacements from £30,000, with full source code ownership and no recurring licence fees.
Software you own. Software that fits. Software that earns its keep.
Pick the level that fits where you are right now. You can start small and grow into the rest, or jump straight to a full platform replacement.
Keep your existing systems. We add an automation layer over the top. Custom APIs, automated data sync, and AI-powered decision making, without ripping anything out. For businesses whose systems work okay individually but don’t talk to each other.
From £8,000 · 4–8 weeks
Learn more →Replace expensive SaaS subscriptions with custom software you own outright. Built around your processes, not a vendor’s template. Break-even against your current subscriptions in 12–18 months. After that, no more licence fees.
From £25,000 · 8–16 weeks
Learn more →Senior engineering leadership without the full-time salary. We set the technical direction, manage the build, keep quality high, and make sure what gets shipped is what your business actually needs. For businesses planning a serious build who want it done right first time.
From £2,000/month
Learn more →No jargon. No buzzwords. Here is what happens when you work with us, in plain English.
You buy a CRM. It works at 60%. You buy an accounting tool. It does not talk to the CRM. You buy a job management system. It has its own database that nobody else can access. You buy an ERP. It forces your team to work in a way that makes no sense for your business.
Every year you pay £30,000 to £80,000 in subscription fees for software that almost fits. Every year the prices go up. Every year you add another tool to plug the gaps. Your team spends hours copying data between systems that should talk to each other but do not.
And you never own any of it. Stop paying, and it all disappears. You are renting your own business processes from companies who can change the terms, raise the price, or shut down the product at any time. For a long time, this was the only option for SMEs. That has changed.
AI has changed the economics of custom software. Build costs have dropped 60 to 70 percent in the last two years. What used to take 12 months and £300,000 now takes 8 to 16 weeks and costs a fraction of that. For the first time, bespoke software is genuinely affordable for UK SMEs.
You get software that works the way your business works. Your processes, your terminology, your workflows. Not a template, not a configuration of someone else’s idea of how a business should run. Your CRM talks to your accounting system. One system, one source of truth, built around how your team actually works.
And you own it. Source code, database, infrastructure. No subscription fees, no vendor lock-in, no price increases. It is yours, the same way a building you bought is yours.
SaaS Subscription
Bespoke Build
5-Year Cost
SaaS subscriptions over 5 years (with annual price increases)
Bespoke build + 5 years maintenance. You own it forever.
AI-accelerated development has cut build costs by 60–70% and compressed timelines from months to weeks. For the first time, bespoke software development UK is a rational financial decision for UK SMEs, not just enterprises. That is why AI automation is built into every platform we deliver where it earns its keep.
AI-accelerated development has cut build costs by 60–70%. What cost £300k–£700k now costs £80k–£200k. Industry estimate
Based on ajairu project data and industry trends in AI-assisted development tooling (2024-2025).
Build cost is now roughly one year of SaaS subscription fees. After that, you own it outright with no more licence fees.
Build times compressed from 30–58 weeks to 8–16 weeks. You get working software in weeks, not quarters.
SMEs are the fastest-growing segment of the custom software market at 20.15% CAGR, outpacing enterprise. Grand View Research (2025)
UK custom software development market expected to grow at 20.2% CAGR from 2025 to 2030. SMEs are the fastest-growing segment.
www.grandviewresearch.com
From connecting your existing systems to building a full bespoke platform that replaces your SaaS stack. Our bespoke software development services cover system integration, ERP replacement, and AI automation. Start at whichever stage fits.
Replace expensive SaaS subscriptions with bespoke software you own outright. Built around your processes, not a vendor's template. Break-even against your current subscriptions in 12-18 months. After that, no more licence fees, no price rises, no lock-in.
Kill spreadsheet chaos. We connect your existing tools with custom APIs and automated workflows. Stop copying data between systems manually. Integrate Salesforce, HubSpot, Xero, Sage, Shopify, and more.
From £8,000 · 4 to 8 weeks
A custom platform built around your exact business processes. Web, mobile, and API development, cloud-native architecture, and full source code ownership. Not forced into a vendor's workflow.
From £25,000 · 8 to 16 weeks
Invoice processing, document classification, and data extraction built into your systems. Manual admin work disappears.
AI Automation UK
Senior technology leadership without the £150,000+ salary. Strategy, architecture decisions, and board reporting, part-time.
Fractional CTO UK
Automated routing, approvals, and notifications across your systems. Work moves itself instead of waiting on inboxes.
Workflow Automation UKAlso available: Technical Consultancy (from £2,000) and Ongoing Support from £350/month. See our full bespoke software development services and pricing for details.
We use modern, proven technologies. No experimental frameworks, no trendy tools that will be unmaintained in two years. Just solid engineering that lasts.
React, Vue, Astro, TypeScript, Tailwind CSS, Progressive Web Apps
Node.js, Python, Go, REST APIs, GraphQL, WebSockets, microservices
PostgreSQL, MySQL, SQLite, Redis, MongoDB, Supabase, PlanetScale
AWS, Azure, GCP, Docker, Kubernetes, CI/CD, Terraform, Cloudflare
Salesforce, HubSpot, Xero, QuickBooks, Sage, Stripe, Shopify, WooCommerce
OpenAI, Anthropic, local LLMs, RAG pipelines, document processing, AI-assisted features
React Native, Expo, PWA, native iOS/Android bridges
Grafana, Datadog, Sentry, Logflare, uptime monitoring, alerting
Don’t see your stack? We work with legacy systems too. Get in touch to discuss your specific setup.
Book a free 30-minute discovery call. We will talk through your business, your systems, and whether bespoke software makes sense for you right now.
Not ready for a call yet? Try our free tools first. No email needed to see your results.
Should you buy off-the-shelf or build custom? Get a clear recommendation with a 3-year cost comparison.
Start CalculatorHow much is your legacy software costing you? Get your tech debt score and estimated annual cost in 2 minutes.
Check My Tech DebtHow well-connected is your tech stack? Find out in 2 minutes if your systems are holding you back.
Check My IntegrationBeing clear about what we don’t do is as important as what we do. It saves both of us time, and it’s why our clients trust us with their bespoke software development projects.
No vendor lock-in. You own the source code, the database schema, and all IP from day one.
No day-rate billing. Fixed prices only. You know the total cost before we start.
No off-the-shelf reselling. We are engineers, not salespeople. If SaaS solves your problem better, we will tell you to buy it.
No tech jargon. Plain English, always. If we use a technical term, we explain it.
No software for software’s sake. Every line of code serves a business purpose.
Learn more about our approach or explore our services and pricing.
Your software should work the way your business works, not the way a vendor decided it should.
GDPR, UK data residency, and security best practices are part of every build.
Full source code, documentation, and deployment rights. No dependency on us.
We build and integrate bespoke software across sectors, bringing enterprise-grade engineering to each. Explore our industry-specific software solutions.
Don’t see your industry? Browse all industries or get in touch and we’ll tell you if bespoke software makes sense for your sector.
No black boxes. No surprise bills. A proven methodology from system assessment to working software.
We learn your business, systems, workflows, and goals. We audit your tech stack and map your data landscape. No assumptions, no templates.
We architect the solution: system design, API specs, database schema, integration plan, and build-vs-buy analysis for each component.
We develop the software using AI-accelerated engineering. Weekly demos, continuous testing, and transparent progress. You see working software early.
We deploy to production, migrate your data, train your team, and stay for 30 days of support. Full source code handover. You own everything.
Practical projects with real numbers, not hype. Cost estimates, build timelines, and ROI calculations for UK SMEs.
Get the free guideNo spam. One email with the PDF.
Real outcomes from UK SMEs who replaced expensive SaaS subscriptions with bespoke software they own. Specific numbers, not vague promises.
“We replaced three separate SaaS subscriptions with a single bespoke CRM and inventory system. It cost less than one year of subscription fees and saves us £42,000 annually. The team adapted to it in days because it works the way we work, not the other way round.”
“Our four disconnected systems were causing delays and errors in order processing every single day. The bespoke ERP replacement unified everything into one platform. Order processing is now 50% faster and the data is accurate across the entire business.”
“The custom B2B ordering portal transformed how our trade customers interact with us. Repeat orders are up 35% because placing an order now takes two minutes instead of calling through to our sales team. The portal pays for itself in new business alone.”
“We had six different systems that did not talk to each other, and staff spent over 20 hours a week manually moving data between them. The integration platform eliminated all of that manual data entry. The time savings alone justified the investment in the first quarter.”
“We replaced Monday.com and Trello with a bespoke project management platform tailored to our design workflow. Project delivery is 40% faster and our team finally has one place for everything. No more toggling between tools or losing context.”
“We replaced three separate property management tools with a single bespoke platform. Maintenance requests, tenancy renewals, and contractor scheduling are all in one place. Our property managers now handle 35% more properties without additional headcount.”
Straight answers to the most common concerns about bespoke software development.
Our focused automation projects start at £2,000. Multi-system integrations run £8,000-£30,000, and full bespoke platform or ERP replacement builds typically range from £25,000 to £80,000+. All engagements are fixed-price with no open-ended billing. The build cost is now roughly equivalent to one year of SaaS subscription fees for the tools you are replacing.
Yes. AI-accelerated development has changed the economics. Build costs have dropped 60-70% over the past two years. What used to cost £300,000 and take 12 months now costs £80,000 and takes 8-16 weeks. The break-even point against SaaS subscriptions is now 12-18 months, not 6-14 years.
Yes, entirely. You own the source code, the database schema, and all intellectual property from day one. No licence fees, no vendor lock-in, no recurring charges for software you have already paid for.
Focused automations take 2-4 weeks. Multi-system integrations take 4-8 weeks. Full bespoke platforms and ERP replacements take 8-16 weeks depending on complexity. AI-accelerated development means we deliver in weeks what traditional agencies take months to build.
We specialise in UK SMEs with 10-250 employees. This is where bespoke software delivers the biggest impact: businesses spending £30,000+ a year on SaaS tools that force them to work the vendor's way instead of their own.
Book a free, no-obligation 30-minute discovery call. We'll talk through your business, your systems, and whether bespoke software makes sense for you right now.
