We make one thing,
and we make it well.

Sudoku was published in a Japanese magazine in 1984 under the name Sūji wa dokushin ni kagiru — "the digits are limited to one." Forty years later, it's arguably the most-played logic puzzle in human history. Newspapers, books, apps. Always on a flat page.

We started ZudoCube in a small workshop in California all the way back in 2007 when a 3 year old wrapped a box with a sudoku puzzle. That sparked an idea. Sudoku as a cube? Six faces? But what if the edges and corners shared the same numbers? Wait... That would turn it into one giant puzzle! It took 24 hours to prove it was possible.

When we finally had a solvable, beautiful cube in our hands, it felt like meeting an old friend in a new city. Familiar but unfamiliar. The same simple rules. A completely different game.

"Same rules. New axis."

What we believe

We're a super small studio. Two of us, mostly. We believe puzzles should be slow on purpose. We don't track streaks, send push notifications, or compete for your attention. The cube is patient. So are we.

Every cube is printed and packed by hand in our workshop. The cardstock is FSC-certified. The numerals are typeset in Söhne. The web app and the iOS app share a Rust core written from scratch so that the puzzle you solve in the browser is bit-for-bit the same one you can buy in a box.

What we don't do

• No streaks. No daily nudges to play.
• No advertising. Nothing for sale you didn't ask about.
• No AI-generated content in the puzzles. Every one is human-curated.
• No customer data sold or shared, ever.