SSO Auth Bridges

Your app, Enterprise Ready.

WorkOS provides APIs to integrate enterprise features like SSO (SAML/OIDC), SCIM Directory Sync, User Management, and Admin Portal into SaaS apps quickly. It's for developers building B2B/multi-tenant products targeting enterprise customers. Key differentiator: Single integration for dozens of IdPs/HRIS, generous free tier, and dev-first design vs. full IAM suites.

Secure AI agents, humans, and whatever comes next

Auth0 is a developer-friendly identity platform providing authentication, authorization, SSO, MFA, and more for web, mobile, and AI applications. It's ideal for developers and enterprises needing scalable, secure user management without building from scratch. Key differentiator: Extensive SDKs for quick integration and strong focus on securing AI agents alongside traditional users.

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 no-code/low-code CIAM platform for building secure, customizable authentication flows for customers, partners, and AI agents. It's ideal for developers and startups seeking to replace complex auth setups without heavy engineering. Key differentiator: drag-and-drop visual workflows and strong G2 ratings for ease of use (4.8/5 from 82 reviews).

A better way to build auth

Stytch is a developer-focused identity platform offering authentication, authorization, and security features like passwordless auth, SSO, MFA, SCIM, and AI agent support via APIs, SDKs, and UI components. It's ideal for startups and scaling SaaS companies building secure apps without heavy auth engineering. Key differentiator: flexible headless options with built-in enterprise multi-tenancy and fraud protection, now backed by Twilio.

More than authentication, Complete User Management

Clerk is a modern authentication and user management platform offering pre-built UI components, APIs, and admin tools for secure sign-up, sign-in, profiles, organizations, and billing. It's ideal for developers building B2C/B2B SaaS apps, especially with React/Next.js, prioritizing fast setup and scalability. Key differentiator: Drop-in, customizable UIs and strong B2B multi-tenancy without heavy coding.

Auth Stack for AI Apps | Start Free

Scalekit provides a modular authentication stack tailored for AI applications, securing SaaS apps, MCP servers, AI agents, and enterprises with features like OAuth for agents, SSO, SCIM, and passwordless auth. It's ideal for fast-moving AI startups and B2B SaaS teams needing quick, scalable identity without migration. Key differentiator: AI-first design with agent auth and org-centric multi-tenancy, free tier up to 1M MAUs.

Built-in user management

Supabase Auth is a built-in authentication and user management system integrated with Supabase's Postgres database, offering email/password, social logins, magic links, and Row Level Security for authorization. It's ideal for developers building full-stack apps who want an open-source Firebase alternative without third-party auth services. Key differentiator: seamless Postgres integration for data ownership and fine-grained access control.

The Identity Layer for Every SaaS Entry Point

Frontegg is a CIAM platform for B2B SaaS teams, offering authentication, SSO, RBAC, and self-service user management with low-code integration. It's ideal for developers building multi-tenant apps seeking quick enterprise-readiness without heavy customization. Key differentiator: Out-of-the-box B2B features like multi-workspace support and AI agent security, praised for ease and support.

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

Kinde is an integrated developer platform providing authentication, access management (including B2B orgs and RBAC), billing, and feature flags for SaaS builders. It's targeted at developers and startups building modern apps who want to secure and monetize quickly without multiple tools. Key differentiator: All-in-one SDK with billing and flags built-in, cheaper and simpler than piecing together Auth0 + Stripe + LaunchDarkly.

Secure Identity for Employees, Customers, and AI

Okta is a leading cloud-based IAM platform offering SSO, MFA, lifecycle management, and governance for workforce and customer identities, including AI agents. It's ideal for mid-to-large enterprises needing secure, scalable access across apps, devices, and users. Key differentiator: Extensive 7,000+ integrations and unified identity security fabric.