In late 2023 we were pitching a half-baked vision: a drag-and-drop canvas where anyone could see quantum error correction circuits come to life. At the time, all we had to show was a grey mock-up (very rough!). In the image below you can see one page of the mock-up, a single screenshot that looked more like Minesweeper than deep-tech software. But the idea was crystalline: make quantum error correction simpler, visual, and accessible!
One founding round later, that sketch is now Entwine, and today we are handing it to the community in the Entropica Quantum Error Correction Challenge 2025. Details at the end, first, the origin story.
We did raise a round at the end of 2023 and with fresh capital came the harder part: turning our idea into code. We also decided to formalise the realisation that quantum error correction is a craft, part science, part engineering and part human ingenuity. We called this project Entwine because quantum error-correction is, at heart, a tapestry of operations woven together to keep information intact. In fact, every product in our stack—Entwine, Loom, Quilt, and the Workbench—nods to the textile arts, a tribute to the Jacquard Loom, an early programmable machine that read punch cards for data input and control long before silicon.
We spent 2024 building the backend (Loom) and experimenting with visual front-ends to simplify working with QEC schemes. We invented the Eka, the first data structure to preserve the context of low-level quantum error correction instructions. We designed quick connections from visual representations (stabilisers) to quantum circuits, mapping them to lower-level representations like QASM and Stim. We integrated lattice surgery operations into the EKA. It is actually remarkable how many bridges we had to build at the software level for our vision to come to life.
Fast-forward to today: That Minesweeper box is now a full-colour IDE where you can prototype a surface-code experiment in seconds. Entwine now does everything we had dreamed of, and a few things we had not even thought about.
Why share this story now?
Because today we hand Entwine to you. The Entropica Quantum Error Correction Challenge 2025 is our way of celebrating that what began as a doodle in a fundraising deck is now a living canvas for the quantum computing community.
For the next two weeks, we are inviting anyone working in quantum error correction to join the challenge. Submissions will close on June 4th, 2025. There are cash prizes, swag, and bragging rights to be won, but most importantly, there is a community to build and a big problem to solve: Correcting errors on quantum computers.
Great breakthroughs start with a sketch, an intuition, a contrarian bet. If you are building the future of fault-tolerance, come weave with us, and show the world what a quantum fabric can do.
Join the challenge, have fun, and as always, to the stars.
