CoSync Auth is a self-hosted and open-source authentication software that simplifies and enhances user authentication and identity management. CoSync Auth provides developers with a secure and customizable authentication solution, offering several features like multi-factor authentication, user metadata profiles, and language localization, with a pricing model that ensures scalability. CoSync Auth aims to empower developers and teams to have full control over their authentication environment while providing a pre-built solution that ensures a seamless integration process.