Software Development Company in London
Zonan System Ltd is a London software development company. We help startups, SMEs and established businesses turn ideas and manual processes into reliable web applications, AI agents and automation — designed, built and supported by one team.
What our London software team does
Why work with Zonan System?
UK company
Zonan System Ltd is registered in England and Wales, with an office in Ruislip, London.
Fixed-scope proposals
Clear scope, milestones and price before work starts — no surprise invoices.
You own the code
Source code, data and documentation are handed over to you.
Local and international
We work with clients in London, across the UK and worldwide, in English.
A software house that thinks about your business first
Good software starts with understanding how your business makes money and where time is lost. That is why every project at Zonan System starts with a free consultation and a discovery phase: we map your process, agree what the first version must do, and only then write code.
Our software development process
- Free consultation — your goals, challenges and budget.
- Discovery and proposal — scope, milestones and a fixed price.
- Design — user flows, wireframes and an interactive prototype.
- Development — short iterations with a demo every week or two.
- Testing and launch — quality assurance, go-live and training.
- Support and growth — monitoring, updates and new features.
Products we have built
Besides client projects, we build and run our own business software: building management, real estate agency software, CRM, online accounting, online booking and an AI assistant for therapists. See the full portfolio.
Recent projects
DeskFlow — office automation software
Smart office automation software: one live kartable for letters, requests and tasks, an official secretariat with digital signatures, a no-code workflow designer, projects with Kanban and Gantt, and real-time reports — bilingual, in the cloud or on-premise.
Building management system
A cloud platform for apartment buildings and residential complexes: flexible service-charge rules with automatic billing, online payment straight to the building’s own gateway, financial transparency reports, maintenance and documents, assembly voting, amenity booking, a guard desk and a mobile resident portal.
Real estate agency management system
All-in-one software for real estate agencies and agents: listings with maps, client requests with smart matching, viewings and calendar, contracts with online signing, an inter-agency network, rentals and pre-sales, AI tools and a public listings website.
Customer relationship management (CRM)
A multi-business CRM for gyms, salons, clinics, schools and any customer-facing business: 360° customer records, Kanban sales pipelines, calendar and SMS reminders, memberships and check-in, invoices with online payment and clear reports.
Online accounting software
Multi-company cloud accounting: chart of accounts, journal entries and fiscal years, sales and purchase invoices with tax, parties and products, cash, bank and cheques, bank reconciliation and dozens of financial reports with Excel and PDF export.
Online booking and appointment system
Online appointments for salons, gyms, clinics, practices and schools: 24/7 booking of truly free slots with no double bookings, staff calendars, online deposits, SMS confirmations and reminders, and a dedicated page for every business.
Frequently asked questions
Where is Zonan System based?
Our registered office is at College House, 17 King Edwards Road, Ruislip, London HA4 7AE, United Kingdom.
Do you only work with London businesses?
No. We work with clients across the UK and worldwide; most meetings are held by video call.
What size of projects do you take on?
From focused first versions (MVPs) and single automations to complete business platforms delivered in stages.
How do we start?
Book a free consultation through the form below, WhatsApp or Telegram. We reply within one working day.
Request a free consultation
Leave your details and a Zonan System expert will contact you within one working day.