Question: How can I automate user authentication processes with customizable workflows?

If you want to automate user authentication with a workflow you can customize, Zapier is a good option. It can link to more than 7,000 apps to perform a range of automation tasks, including user authentication, with its Zaps, Tables and Interfaces. You can create your own automation without having to write any code, and Zapier has enterprise-level security compliance, so it's a good choice for startups, small and medium-size businesses.

Another option is Clerk, a full-stack user management service that offers a range of embeddable UI components, flexible APIs and administrative control panels. It supports multifactor authentication, secure password authentication and social sign-on, as well as customizable roles and permissions. Clerk can be easily integrated with popular frameworks and tools, and it offers a free plan for up to 10,000 monthly active users.

Auth0 is another option for secure user authentication, with Universal Login, Single Sign On and Multifactor Authentication. With more than 30 SDKs and Quickstarts, it can be easily integrated into a variety of languages and frameworks. The service is flexible and scalable, so it can be used by businesses of all sizes, and it offers a free plan to get you started.

Last, Workflos offers a single platform with features like Single Sign-On, Multi-Factor Authentication and Universal Directory synchronization. It supports more than 100,000 products across 11 categories and offers customizable logs and real-time access control. With a pay-as-you-go pricing model, it's a flexible option for businesses of any size that want to manage SaaS applications.