SSO Auth Bridges

Secure AI agents, humans, and whatever comes next

Auth0 by Okta is a robust identity platform that provides enterprise-grade authentication and authorization for humans and machines. It is designed for developers seeking to outsource complex security logic like SSO, MFA, and now, secure identity for AI agents. Its key differentiator is its new AI-specific identity layer, featuring a Model Context Protocol (MCP) server and Token Vault for agentic tool-use.

Modern auth and billing for engineers. The fully integrated developer platform.

Kinde is an all-in-one developer platform that consolidates authentication, multi-tenant organization management, feature flags, and billing into a single SDK. Designed primarily for SaaS founders and engineers, it differentiates itself by eliminating the 'integration tax' of connecting separate vendors for core product infrastructure.

Secure Identity for Employees, Customers, and AI

Okta is the industry-leading identity and access management (IAM) platform that provides secure SSO, MFA, and automated lifecycle management for workforces and customers. It is designed for medium to enterprise-scale organizations requiring a centralized 'identity fabric' to manage thousands of applications. Its key differentiator is the Okta Integration Network (OIN), which features over 7,000 pre-built integrations, far outpacing most competitors.

More than authentication, Complete User Management

Clerk is a comprehensive authentication and user management platform that provides pre-built, embeddable UI components specifically optimized for modern web frameworks like Next.js and React. It serves developers looking to bypass the complexity of building auth from scratch, differentiating itself through its high-fidelity UI 'blocks' and deep multi-tenancy support for B2B applications.

The Identity Layer for Every SaaS Entry Point

Frontegg is a B2B-focused Customer Identity and Access Management (CIAM) platform that provides end-to-end user management, from authentication to complex enterprise features like multi-tenancy and SCIM. It is designed for SaaS builders who want to offload the development of self-service admin portals and enterprise-grade security. Its key differentiator is the 'plug-and-play' multi-tenancy architecture that allows end-users to manage their own organizations, roles, and SSO settings.

Built-in user management

Supabase Auth is a built-in user management system that leverages PostgreSQL's Row Level Security (RLS) to handle authentication and authorization directly within the database. It is designed for developers seeking an open-source alternative to Firebase, offering seamless integration with social providers and enterprise SSO. Its key differentiator is that user data resides in your own database schema, allowing for complex access control without external service calls.

A better way to build auth

Stytch is a developer-first identity and access management (CIAM) platform that specializes in passwordless authentication and enterprise-grade B2B features. Recently acquired by Twilio, it distinguishes itself by being one of the first platforms built natively for both human users and AI agents, supporting modern standards like passkeys and the Model Context Protocol (MCP).

Auth Stack for AI Apps | Start Free

Scalekit is an identity middleware layer that provides modular authentication and authorization tools specifically designed for B2B SaaS and AI applications. It enables developers to integrate enterprise-ready features like SSO, SCIM, and secure AI agent connectivity without replacing their existing authentication stack. Its standout feature is its specialized support for the Model Context Protocol (MCP) and delegated access for AI agents.

Your app, Enterprise Ready.

WorkOS is a developer platform that provides essential building blocks to make SaaS applications enterprise-ready with minimal engineering effort. It focuses on high-value features like SSO, SCIM directory sync, and audit logs, differentiating itself by abstracting the complexity of legacy enterprise protocols into modern, developer-friendly APIs.

Reduce user friction, prevent account takeover, and get a 360° view of your customer and agentic identities with the Descope External IAM platform.

Descope is a developer-centric External IAM platform that replaces complex authentication code with visual, drag-and-drop workflows. It is designed for B2B and B2C applications and differentiates itself with its unique 'Agentic Identity Hub' for securing AI agents and MCP servers. The platform allows teams to implement passwordless auth, MFA, and SSO with minimal engineering overhead.