No, and they should be considered a band-aid at best. One of the most popular overlay companies, accessiBe, literally had their sponsorship revoked from the National Federation of the Blind’s annual conference in 2021. In a public press release, NFB noted “accessiBe currently engages in behavior that is harmful to the advancement of blind people in society.” Ouch.  Overlays often get marketed as a quick fix for accessibility issues, which is inherently false. This type of marketing is largely why overlays are so openly debated in the accessibility community. While overlays can provide some benefit in certain contexts, they should not be considered a comprehensive solution to web accessibility. It is recommended to prioritize building accessible websites from the ground up, adhering to established accessibility standards with old fashioned manual testing.