SSO Auth Bridges

The Identity Layer for Every SaaS Entry Point

Frontegg is a B2B-focused identity platform providing deep multi-tenancy, enterprise SSO, and self-service admin portals. It targets SaaS builders who need to scale from early-stage to enterprise-ready with minimal engineering overhead.

Your app, Enterprise Ready.

WorkOS is a developer platform that abstracts the complexity of enterprise features like SSO, SCIM provisioning, and audit logs into a unified API. It is designed for B2B SaaS companies that need to sell to large organizations without spending months on custom integrations, offering a unique self-service Admin Portal for customer IT admins.

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 modern CIAM platform that replaces traditional code-heavy authentication with a visual, drag-and-drop workflow builder. It is designed for developers building B2C, B2B, and AI-driven applications, with a unique focus on 'agentic identities' for autonomous AI agents.

Secure Identity for Employees, Customers, and AI

Okta is a cloud-native Identity and Access Management (IAM) leader that centralizes authentication, authorization, and user lifecycle management for employees and customers. It is designed for enterprise-scale organizations needing to secure thousands of applications through a single, vendor-neutral identity provider. Its key differentiator is the Okta Integration Network (OIN), which features over 7,000 pre-built integrations, making it the most connected identity fabric on the market.

More than authentication, Complete User Management

Clerk is a developer-centric authentication and user management platform primarily optimized for React and Next.js applications. It differentiates itself by providing high-quality, pre-built UI components and B2B organizational features that allow developers to implement complex auth flows in minutes rather than days.

Secure AI agents, humans, and whatever comes next

Auth0 is a developer-centric identity platform that provides highly extensible authentication and authorization services for applications and AI agents. It serves everyone from solo developers to global enterprises, differentiating itself through its massive SDK ecosystem and the 'Auth0 Actions' serverless extensibility framework.

Auth Stack for AI Apps | Start Free

Scalekit is a middleware identity layer specifically designed for AI-native and B2B SaaS applications to handle complex Enterprise SSO, SCIM, and agent-based authentication. It allows developers to secure Model Context Protocol (MCP) servers and manage delegated AI agent access without rebuilding their existing auth stack. Its key differentiator is the dedicated 'Agent Auth' module that handles token vaults and user-consented tool access for autonomous agents.

Built-in user management

Supabase Auth is a developer-centric user management system built on PostgreSQL and the GoTrue engine. It is designed for developers who want a fully integrated authentication and authorization layer that leverages Postgres Row Level Security (RLS) for fine-grained access control. Its key differentiator is being 'SQL-native,' where user data resides directly in your database rather than in a siloed third-party service.

A better way to build auth

Stytch is a developer-first identity platform that provides API-driven authentication and authorization for both human users and AI agents. Acquired by Twilio in late 2025, it distinguishes itself with a 'headless' architecture that allows complete UI customization and robust multi-tenant support for B2B SaaS. It is the market leader for 'agent-ready' identity, offering specialized primitives for autonomous AI workflows.

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

Kinde is a unified developer platform that integrates authentication, multi-tenancy, feature flags, and billing into a single SDK. Designed for B2B SaaS engineers, it differentiates itself by providing a complete infrastructure stack that eliminates the need to stitch together separate tools like Auth0, LaunchDarkly, and Stripe.