123Digi is a UK custom software development company. We design and build web applications, mobile apps, AI integrations, booking systems and business automation that help growing businesses save time, serve customers better and increase revenue.
Six core disciplines, one senior UK team. Engage one service on its own, or bring us in end to end so strategy, product, engineering and growth all run as a single operation.
We design and develop bespoke software around the way your business actually works, so your team stops fighting off-the-shelf tools and starts compounding real results.
Secure, scalable web applications including dashboards, customer portals, booking systems and internal tools that handle real volume without breaking.
Modern iOS and Android mobile apps built for customers, field staff and operations teams. Native performance, offline sync, payments and push notifications included.
Practical AI tools, chatbots and workflow automations wired into your existing systems so your team handles more enquiries and less admin, 24 hours a day.
Automate repetitive tasks, connect your CRM, accounting and scheduling tools together, and give your team hours back every week.
Improve your visibility in Google, bring in qualified enquiries and build a consistent brand on social. Local SEO, technical SEO, content and campaigns in one programme.
We do not just design websites. We design and build complete digital systems. That includes customer-facing websites and mobile apps, internal dashboards, booking platforms, automations and AI integrations, all engineered and supported by one UK team.
Discover, design, develop, launch and grow. A simple process that takes your idea, turns it into real software your team uses every day, and keeps improving the system after it goes live.
We sit down with you, map how your business runs today and agree exactly what the software needs to do for your team and your customers.
We plan the user experience, design the screens and agree the system architecture before a single line of production code is written.
We build the software, web app, mobile app or integration on modern, typed technology, shipping in small releases you can review and test.
We test, deploy and support the new system so it works the day it goes live and keeps working under real-world use.
We help you grow the system after launch with SEO, performance improvements, new features and ongoing automation.
From booking platforms for garages to AI chatbots, customer dashboards, B2B portals and lead generation websites. Real, working digital systems for real UK businesses.
MOT, service and garage booking platforms with live slot availability, text and email reminders, and customer accounts.
Trade ordering, account management and checkout flows for retail, wholesale and B2B businesses that need to sell around the clock.
Self-service portals where your customers can track orders, bookings, documents and support without ever needing to call in.
Back-office tools that replace spreadsheets with typed workflows, audit trails and proper role-based access for every team.
iOS and Android apps for field teams, driver workflows, in-store staff and customers on the move.
AI assistants, smart search and workflow automation that lift repetitive work off your team and answer customers instantly.
High-converting marketing sites and landing pages designed to turn Google traffic into qualified sales enquiries.
Local SEO, technical SEO and social media campaigns that keep a steady pipeline of new customers coming into your business.
We are not a generic web agency. We are a small, senior UK software team that designs, engineers and supports real digital systems, long after launch day.
Strategy, product design, engineering and digital growth under one roof. No juggling three agencies, no finger-pointing when something breaks.
We measure success in bookings, enquiries, revenue and hours saved every month, not in vanity metrics or pretty screenshots.
We build on Next.js, TypeScript, Postgres and cloud infrastructure so your software is fast to launch, secure in production and easy to maintain for years.
You work directly with the senior UK engineers and designers doing the work. No account-management layers and no late-night overseas handovers.
We recommend what your business actually needs. If a simple automation beats a six-month software build, we will tell you that up front.
We stay involved after launch, supporting, improving and scaling the system as your business grows. Many of our clients have been with us for years.
Every engagement runs through one senior UK contact.Based in the UK, working directly with you. No offshoring and no account managers standing between you and the engineers.
Real UK operators, real digital systems and real improvements. Across booking platforms, web applications, AI integrations, automations and growth campaigns.
“Our phones are quieter, the bays are fuller, and customers arrive knowing exactly what they booked. The new site simply works every single day.”
“We went from invisible on Google to ranking on the first page for the local searches that actually matter. Our booking numbers show it every month.”
“123Digi gave us a clearer brand, a faster site and a real plan for SEO. It feels like having a digital team sitting inside our own business.”
Straight answers on cost, timelines, ownership, technology and how we work. If something is not covered here, a quick discovery call will clear it up fast.
We are a UK custom software development company. We design and build web applications, mobile apps, AI integrations, booking systems, customer portals, business automations and high-converting marketing websites. Most clients engage us across two or three services so the whole digital system pulls in one direction.
No. Websites and landing pages are one of the things we do, not the whole offer. We are a software company first, which means we can build anything from a marketing site all the way to a full booking platform, mobile app or AI-powered internal tool.
Most 123Digi engagements start around £18,000 for a focused MVP and typically sit between £35,000 and £120,000 for a full production system. Mobile apps, AI integrations and ongoing growth retainers are scoped separately. We always agree a clear scope and a transparent price before engineering starts.
Discovery usually takes 1 to 2 weeks. Most web apps and custom software projects go from kick-off to a usable first release within 6 to 12 weeks. Mobile apps tend to run 10 to 16 weeks. We ship in small, reviewable releases so you see progress every couple of weeks.
We are based in Colchester, Essex. We work with UK businesses everywhere, including London, the South East, the Midlands and the North. Everything we do is delivered remotely with regular video calls, and we meet in person for discovery or key milestones when it helps.
Yes. You own the source code, the infrastructure and the data. We hand over clean Git repositories, document the architecture and support you for as long as you want us to. You are never locked in to 123Digi.
Yes. We routinely take over existing websites, web apps, mobile apps and automations. We start with a short audit, fix anything urgent, then agree a roadmap for improvements so you get value quickly without a risky rebuild.
Book a free consultation. We will listen to what you want to build, ask a few questions about how your business works today, and come back within one working day with a clear next step, a rough timeline and an honest view on cost.
Whether it is a custom web app, a new mobile app, an AI integration or a full digital overhaul, tell us what you want to build. We reply within one working day with a clear next step and a ballpark timeline.
