Auth0 is a comprehensive identity management solution that supports various protocols and authentication methods, but its user management is capped at 7,500 users for $1,725/month. Frontegg provides ready-to-use tools for B2B SaaS apps with features like authentication, authorization, and user management, but it has no automatic volume discounts and limited customization options. Clerk offers a consumer-centric authentication solution with pre-built embeddable components, APIs, and admin dashboards, but lacks SCIM integration and audit logs. Stytch is a versatile authentication platform that supports multiple authentication methods, customization, and single sign-on, but does not offer audit logs or machine-to-machine authentication. WorkOS stands out as an enterprise-focused solution with features like Directory Sync for SCIM provisioning, OIDC and SAML SSO, roles, organization-scoped policies, and audit logs, making it a suitable choice for building apps for enterprises.