hello@celsatechnologies.co.uk London, United Kingdom

Products

Alongside client work, we make and sell our own things. It keeps our skills sharp, and it means we know what it takes to ship, support and grow a real product.

ColdSoup

The AI-native office suite for teams.

Docs, slides, sheets, chat and a calendar in one shared room, with an AI helper on every page. Start a room, send the link, and your team is in.

Live · Works in any browser · Built by Celsa in London

Everything a team needs, in one room.

No accounts to create and no apps to install. Type your name, share the link, and start working together.

  • One room, every tool

    Docs, slides, sheets, chat and a shared calendar sit side by side, so nobody hunts across five apps for the latest version.

  • One link and you're in

    Start a room in one click and share it. An edit link for people who build, a view link for people who follow along.

  • Edit together, live

    Everyone works on the same page at once. Your name follows your cursor, your messages and your lines in the activity log.

  • An AI helper on every page

    Ask it to draft a document, plan a project or build a sheet. It works inside the room, using the files your team already has.

  • You stay in charge

    The helper works in the open. Its changes are visible and attributed, and any of them can be reverted in a click.

  • Drop it in once

    Add a file to the room and it's there for everyone, including the helper. No more pasting the same context into a chatbot.

Printed book · £24

The Software Handbook.

A plain-English guide to how software is put together, from front ends and databases to hosting, security and working with developers. Paperback, delivered anywhere in the UK.

Why a studio makes products.

Building our own software means living with every decision: the architecture, the hosting bill, the support inbox. That experience goes into every client project.

  • Tested for real

    The patterns we recommend to clients are ones we run in production ourselves.

  • Product thinking

    We think about onboarding, support and what happens in month six, as well as the build.

  • Careful with AI

    We've shipped an AI helper that works in the open, with clear limits and an undo button.

  • Kept simple

    Software we have to maintain ourselves is software we keep simple.

In the lab.

What we've shipped, and what's next. We're also open to building products with the right partners.

  • ColdSoup

    The AI-native office suite for teams. coldsoup.com

    Live
  • The Software Handbook

    Our printed guide to how software is structured. £24 paperback

    On sale
  • Your product idea

    Need a technical team to design, build and launch a product with you? Talk to us

    Partnerships

Tell us what you're building.

A few lines is plenty. We aim to reply within one working day, and if we're a good fit you'll get a fixed quote.

Start a project