Codility vs. Acorn

Codility is a technical and AI skills assessment platform built on documented assessment science. For almost two decades it has helped engineering and talent teams answer one question with evidence: who can actually do the work. Every task is designed by occupational psychologists, mapped to the Codility Engineering Skills Model, and monitored for adverse impact at every measured cut score. When a result is challenged, the methodology behind it is documented and reviewable. Three products run on that foundation. Screen delivers standardized early technical signal at scale.

Acorn is the skills and development platform that closes the gap between what your people need to be able to do, what they can do today, and what is working to close it. Every role gets a standard, drawn from a framework of thousands of capabilities and proficiency levels. Your people capture the work they do against that standard, and the assessment is the checkpoint where a manager confirms what that work demonstrates. Development plans turn the gaps into action, and learning builds the skill.