Software company · Espoo, Finland

Small apps, carefully made.

Datamediate Oy builds focused apps that each do one job well — and respect the people who use them.

Our apps

Language learning

KPT!

Finnish verb conjugation drills. Practise all 11,000+ Finnish verbs, fully offline, with feedback that explains exactly what went wrong and why.

Coming soon for iOS and Android

About KPT!

Puzzles

Across

A new cryptic crossword every day, solved together by your family on one shared grid — for families spread across towns, countries and time zones.

For iPhone and iPad

Help Privacy

Business tools

CTY

Free, open-source Corporation Tax filing for UK micro-companies. Prepares the CT600, accounts and tax computation on your own computer and files them directly with HMRC.

Pre-release for macOS and Windows

About CTY Privacy

How we work

Private by design

No ads, and we never sell your data.

Focused

Each app does one thing and tries to do it properly, without clutter or distractions.

Built to last

We're a small, independent company. We build the foundations ourselves and look after our apps for the long term.