SSO Auth Bridges

Identity Without Constraints

FusionAuth is a full-featured CIAM and identity platform for engineering-led companies that need authentication, authorization, SSO, MFA, social login, passkeys, user management, and machine-to-machine identity. It is best suited to B2B SaaS, B2B2C, regulated, or infrastructure-conscious organizations, with deployment flexibility and a free self-hosted Community edition as its main differentiators.

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 low-code/no-code Customer and Agentic Identity and Access Management (CIAM) platform designed to streamline authentication, authorization, and user management for B2B and B2C applications. Built for developers and product teams, it differentiates itself with visual drag-and-drop workflow orchestration paired with dedicated identity governance for AI agents and MCP servers.

More than authentication, Complete User Management

Clerk is a developer-centric authentication and user management platform providing prebuilt UI components and backend identity APIs. Built for modern full-stack web frameworks like React and Next.js, it eliminates authentication boilerplate with turnkey drop-in components. Its key differentiator is the combination of pixel-perfect embeddable frontend components with native B2B multi-tenancy and organization management.

Access without friction. Security without compromise.

OneLogin is a cloud-based Identity and Access Management (IAM) platform that provides secure Single Sign-On (SSO), Multi-Factor Authentication (MFA), and automated user provisioning. It is designed for IT teams seeking a fast-to-deploy alternative to complex legacy identity systems with a focus on a frictionless user experience.

Secure Identity for Employees, Customers, and AI

Okta is an enterprise-grade identity and access management (IAM) platform providing unified single sign-on (SSO), adaptive multi-factor authentication (MFA), and automated lifecycle management. Built for mid-market to large enterprises and cloud-native software teams, it serves both workforce identity and customer identity needs. Its key differentiator is the vast Okta Integration Network (OIN) and deep API-first architecture covering both human and machine identities.

Identity Security for the Digital Enterprise

Ping Identity is an enterprise-grade identity security platform offering SSO, MFA, and automated identity orchestration for workforce and customer use cases. It is specifically designed for large organizations managing complex hybrid environments, distinguishing itself through its highly flexible 'DaVinci' no-code flow builder.

Secure AI agents, humans, and whatever comes next

Auth0 by Okta is an enterprise-grade authentication and authorization platform designed to secure web applications, APIs, mobile apps, and autonomous AI agents. It provides turnkey identity management with features like SSO, MFA, and social logins across 30+ SDKs. Its primary differentiator is its modern agentic security architecture, including Token Vault and native Model Context Protocol (MCP) authentication for autonomous tools.

Prevent identity attacks and secure access to apps and resources.

Microsoft Entra ID is a cloud-based identity and access management solution that secures access to applications and resources for workforce and external users. It is designed for organizations of all sizes, with a primary differentiator being its deep, native integration into the Microsoft 365 and Azure ecosystems.

Unified Platform for Identity, Access, & Devices

JumpCloud is a unified cloud directory platform that merges identity management (IAM) with cross-platform device management (UEM). It is designed for modern, often remote or hybrid, IT teams looking to replace legacy on-premises infrastructure like Active Directory with a single 'pane of glass' for users and their devices.

The Identity Layer for Every SaaS Entry Point

Frontegg is a B2B-focused Customer Identity and Access Management (CIAM) platform that provides pre-built authentication, multi-tenancy, and self-service portals. It is designed for SaaS builders who need to scale from simple logins to complex enterprise features like SSO and SCIM without significant custom engineering. Its key differentiator is the 'Admin Portal,' a drop-in UI that allows end-customers to manage their own organizational security settings autonomously.

Open source identity and access management solution for single sign-on and authentication.

Keycloak is a powerhouse open-source identity and access management (IAM) solution designed for developers who need to centralize authentication and authorization. It acts as a gatekeeper for applications, supporting industry-standard protocols like OpenID Connect and SAML with a key differentiator of being entirely self-hosted and zero-cost for licensing.

One platform to secure every identity—for humans, machines, and AI.

SailPoint Identity Security Cloud is a mature, AI-powered enterprise IGA platform for managing identity access, governance, and compliance at scale. It targets large organizations with complex, regulated environments needing deep automation and visibility. Its key differentiator is comprehensive feature depth and adaptive AI capabilities across human, machine, and AI identities.

Built-in user management

Supabase Auth is an open-source user management and authentication service natively built into PostgreSQL and the Supabase backend ecosystem. It is designed for developers building web, mobile, and serverless applications who want comprehensive auth without managing separate infrastructure. Its defining differentiator is direct integration with PostgreSQL's Row Level Security (RLS), allowing authorization rules to be enforced directly in database queries.

Your app, Enterprise Ready.

WorkOS is an API-first enterprise identity platform for B2B SaaS companies that need SSO, Directory Sync/SCIM, authentication, organizations, RBAC, audit logs, and enterprise onboarding. Its key differentiator is reducing the engineering effort required to support many enterprise identity providers through unified APIs, SDKs, webhooks, and tools such as Admin Portal and AuthKit.

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

Kinde is a unified developer platform that combines authentication, multi-tenant organization management, feature flags, and billing into a single SDK. It is designed for SaaS engineers who want to avoid 'SDK sprawl' by managing the entire user lifecycle—from sign-up to monetization—through a single provider.

Auth Stack for AI Apps | Start Free

Scalekit is an auth middleware platform purpose-built for AI applications, focusing on securing interactions between users, agents, and enterprise SaaS environments. It serves as a specialized identity layer that enables developers to add Enterprise SSO, SCIM, and delegated AI agent access without overhauling their existing authentication systems.

A better way to build auth

Stytch is an API-first identity platform built for B2B SaaS and AI agents, offering developer-centric authentication, authorization, and fraud prevention. It distinguishes itself by providing native multi-tenancy and enterprise features like SSO and SCIM without the typical "enterprise-only" price gating found in legacy competitors.