We got tired of shipping code we could not explain.
Three of us, working out of DTU Skylab in Copenhagen. We kept hitting the same wall on other people’s codebases and then on our own: the code was written faster than anyone could learn it, and the tools we had all helped with the writing.
So we asked 92 developers whether it was just us — students across several universities, and engineers a few years into the job. Fifty-six had shipped code they did not fully understand. Nobody said no. That answer is the whole reason Crux exists.
We are building the part nobody has built: comprehension you can point at. A course from the code that is really there, a recall check that is hard to fake, and a map of who on the team actually knows which system.



Not doing this alone.
A university hub, a coach who asks the uncomfortable questions every month, and a mentor from outside the building.
- DTU Skylab
The innovation hub at the Technical University of Denmark, and where Crux gets built. Desks, workshops, and a room full of people who will tell you your idea is confusing. skylab.dtu.dk
- Our coach
Startup coach at Skylab. Monthly sessions on customers, pricing, and the parts of this that are not code.
- External mentor
Outside the university.