Bicester · Oxfordshire · 25+ years

Software that removes work,
not work that removes software.

We build AI automations and internal tools for Oxfordshire businesses, websites engineered to rank in local search, and Claris FileMaker systems for clients across the UK. Twenty-five years of shipping things that stay shipped.

Illustration of Celsius Software services: AI automation, search-optimised websites and Claris FileMaker development
25+ yrs
Building business systems in the UK
3 disciplines
Automation · Search · FileMaker
Weeks
Not months, to something you can use

What we do

Three things, done properly.

How we work

Under-promise, over-deliver.

It has been our line for twenty-five years and it is still the whole method. We map the process before we write anything. We deliver something usable early, so you can change your mind while changing your mind is still cheap. And we tell you when a project is not worth doing — which is, quietly, the most valuable thing a developer can say.

You own everything we build. No proprietary lock-in, no rented websites, no systems only we can maintain.

  • 01

    Measure

    We find where the hours actually go before proposing anything.

  • 02

    Prototype

    A working version early beats a perfect specification late.

  • 03

    Ship

    In use, in production, earning its keep.

  • 04

    Extend

    Systems that grow with the business rather than being replaced.

Insights

Written to be useful.

All articles →

Where we work

Local enough to visit. Experienced enough not to need to.

Our AI automation and website work is focused on Bicester and the surrounding Oxfordshire towns, where being able to sit across a table still matters. FileMaker development runs UK-wide, remotely and on site.

  • Bicester
  • Oxford
  • Banbury
  • Kidlington
  • Buckingham
  • Brackley
  • Witney
  • Aylesbury
  • Woodstock
  • Thame
  • Milton Keynes
  • Abingdon

Elsewhere in the UK? Still worth asking.

Tell us what is taking too long.

Describe the process, the system or the search term you cannot crack. We will tell you honestly whether we can help, what it would take, and whether it is worth it.

Talk to us