Are automated accessibility tools sufficient?

No. Automated testing is an important building block, but not a complete proof. Tools like axe-core or Lighthouse detect, depending on the source, only around 30 to 50 percent of all accessibility issues (Source: WebAIM). They reliably find technical defects like missing alt attributes or insufficient contrast, but cannot judge meaning and context.

Whether an alt text is meaningful, whether a screen reader's reading order stays logical, whether error messages are understandable, or whether a complex widget is keyboard operable, can only be checked manually, ideally with real assistive technologies.

That is why our WCAG audit combines automated scans with manual expert evaluation and screen reader testing. Only this mix delivers a robust conformance record.