JustAuthenticateMe is described as 'Offers a simple authentication-as-a-service for your web apps. It uses magic links in emails as a way to verify identity so that neither you nor your users have to worry about passwords' and is an app in the development category. There are more than 10 alternatives to JustAuthenticateMe for a variety of platforms, including Web-based, SaaS, Self-Hosted, Windows and Linux apps. The best JustAuthenticateMe alternative is Keycloak, which is both free and Open Source. Other great apps like JustAuthenticateMe are AuthKit, Hanko, Stack Auth and Auth0.