Automation detection

Control access

Preventing automated access to data by setting challenges that are easy for humans to complete, but hard for computers. Common challenges include reading distorted text and identifying objects in a photo.


  • Reduces impact of automated access to systems, such as denial of service or spam

  • Can be used to train machine learning models


  • Progress in machine learning can allow computers to complete some challenges

  • Accessibility issues for people using assistive technologies