Compare Auth0 vs. Castle

Auth0 takes a modern approach to Identity and enables organizations to provide secure access to any application, for any user. Auth0 is highly customizable, and simple yet flexible. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation. With Auth0, you can rapidly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control.

Castle provides a solution for real-time event scoring and threat identification by allowing you to feed any user interaction into its system. It delivers immediate decisions to prevent spam registrations and thwart account takeover attempts, resulting in reduced friction and improved conversion rates. With our seamless APIs, you can streamline your registration process while effectively eliminating unwanted spam. Castle’s top-tier account takeover protection comes ready to use, offering robust defense against credential stuffing threats. Whether it's during registration, login, or within your application's interface, Castle effectively screens critical user events to distinguish between legitimate users and malicious bots. However, identifying threats is just the beginning; you can also automate account recovery processes, implement step-up authentication, or send user alerts through Castle's Webhooks and Notifications. Furthermore, Castle meticulously analyzes the intricate traffic patterns of your application, monitoring individual users and devices distinctly. By understanding what constitutes normal behavior for your app and its users, Castle excels at pinpointing unusual activities and potential risks, ensuring a safer environment for all users. This comprehensive approach not only enhances security but also fosters user trust and engagement.