Add sign-in without building auth

Drop-in authentication with SSO, MFA, and user management, shipped this sprint instead of next quarter.

Identity-ready auth stack

Individual products and alternatives (9)

Clerk

Ship customer sign-in

Clerk is a developer-first authentication and user management platform providing drop-in components for sign-in, sign-up, user profiles, organizations, and multi-factor authentication.

Stytch

Ship customer sign-in

Stytch is an authentication and identity platform providing passwordless login, multi-factor authentication, OAuth, and session management APIs for developers.

Kinde

Ship customer sign-in

Kinde is a customer identity platform for startups and growth-stage SaaS teams that want auth, organizations, permissions, and billing-ready user models out of the box.

WorkOS

Add enterprise identity

WorkOS is an authentication and user management platform that helps B2B SaaS companies add enterprise features like SSO, SCIM, and fine-grained authorization.

Frontegg

Add enterprise identity

User management platform providing authentication, authorization, and multi-tenancy for B2B SaaS applications with embedded login experiences.

Zitadel

Add enterprise identity

Zitadel is an open-source identity management platform providing authentication, authorization, and user management with multi-tenancy support for B2B SaaS applications.

Permit.io

Govern application permissions

Permit.io is a full-stack authorization platform that provides policy-based access control (RBAC, ABAC, ReBAC) with a visual policy editor and SDKs for implementing fine-grained permissions.

Oso

Govern application permissions

Oso helps product teams implement application authorization with policy logic, permissions modeling, and developer tooling built for real software products.

OpenFGA

Govern application permissions

OpenFGA is an authorization system for modeling fine-grained permissions and relationship-based access control in software products and internal platforms.