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hello@celsatechnologies.co.uk London, United Kingdom

About

Celsa is a small, founder-led studio in London. We build our own products and help other businesses build theirs.

We'd rather build a few things well than a lot of things quickly, and we'd rather charge a fair price than a big one.

Celsa started with a simple idea: the people who build software should be the people you talk to. No account managers and no hand-offs between what you asked for and what gets built.

We're deliberately small. That keeps us close to every project, quick to make decisions, and honest about what's worth building.

We split our time between our own products, like ColdSoup and The Software Handbook, and work for clients. Running our own software teaches us things client work alone can't, and all of it goes into yours.

We're based in London and happy to work with businesses anywhere, from founders with an idea on a napkin to established companies replacing a tool that's holding them back.

How we work.

It shapes how we quote, how we build and how we treat the people we work with.

  • Talk to the builders

    You work directly with the people designing and writing your software, from the first call to launch day.

  • Plain English

    Clear proposals, honest timelines and straight answers, even when they're not what you hoped to hear.

  • Ship early

    We get working software in front of you quickly, then improve it with real feedback instead of guesses.

  • Easy to change later

    Simple structure, tidy code and proper notes, so your software stays easy to work on for years.

51.5072° N, 0.1276° W

Based in London. Working wherever you are.

Company
Celsa Technologies LtdRegistered in England and Wales.
Registered office
13 Wroughton Terrace, London NW4 4LE, United Kingdom
What we do
Products and client workOur own software and books, plus websites and software for businesses.
Say hello
hello@celsatechnologies.co.ukWe aim to reply within one working day.

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