Authentication & Identity brand directory

Auth0

Rank #1 · 30.7% visibility

Auth0 by Okta is a cloud-based Customer Identity and Access Management (CIAM) platform that provides authentication, authorization, and user management as a service. It allows developers to integrate secure login, SSO, MFA, and passwordless flows into any application via SDKs, APIs, and a low-code extensibility layer (Actions and Forms), while offering enterprise features such as multi-tenancy, SCIM provisioning, fine-grained authorization, and AI agent authentication support.

Clerk

Rank #2 · 22.7% visibility

Clerk is a complete authentication and user management platform delivered as embeddable UI components, REST APIs, and admin dashboards. It covers the full user lifecycle—sign-up, sign-in, profile management, session control, multi-tenancy, billing, and machine identity—enabling developers to ship production-grade auth without building it from scratch.

WorkOS

Rank #3 · 19.3% visibility

WorkOS is a modular, API-first enterprise identity platform that enables B2B SaaS developers to ship SSO, SCIM directory sync, user management, audit logs, bot protection, and encryption key management with a few lines of code. Its products include Enterprise SSO, Directory Sync, AuthKit (hosted auth UI), Admin Portal (self-service IT admin configuration), RBAC, Radar, Vault, and MCP Auth for AI agent ecosystems. Modern RESTful APIs and SDKs for seven languages make it a developer-default choice for companies moving upmarket.

Stytch

Rank #4 · 6.7% visibility

Stytch is an identity platform for developers offering a full-stack CIAM solution covering passwordless auth, MFA, SSO, SCIM, RBAC, multi-tenancy, fraud prevention, and AI agent authentication via a flexible API and SDK layer.

FusionAuth

Rank #5 · 5.3% visibility

FusionAuth is a full-featured CIAM platform engineered for developers, offering complete identity infrastructure — authentication, authorization, user management, and session control — deployable anywhere from a local dev box to air-gapped enterprise environments. It is built around open standards, an API-first design, and a unique single-tenant architecture that avoids the 'noisy neighbor' risk of shared SaaS platforms.

Descope

Rank #6 · 3.3% visibility

Descope is a no/low-code external IAM platform that lets developers build and modify complete authentication and user management flows—signup, login, MFA, SSO, step-up, and identity federation—through a visual drag-and-drop workflow editor, without touching application code. It supports all major auth methods (passkeys, magic links, OTP, social logins, SAML/OIDC SSO, biometrics), provides multi-tenant B2B infrastructure with self-service SSO and SCIM, and includes a connectors ecosystem for orchestrating 50+ third-party services inline. In 2025, Descope launched an Agentic Identity Hub covering authentication and authorization for AI agents and MCP servers.

SuperTokens

Rank #7 · 2.7% visibility

SuperTokens is an open-source authentication and session management platform. It provides drop-in SDKs for the most popular web and mobile frameworks, a pre-built customizable login UI, and a self-hosted or cloud-hosted authentication core. Its open-core model makes the full feature set for individual apps free to self-host, while charging per-MAU for the managed cloud service and optional enterprise add-ons such as MFA, account linking, multi-tenancy, and attack protection.

Keycloak

Rank #8 · 2.0% visibility

Keycloak is a battle-tested, open-source IAM platform that enables organizations to add authentication and access control to any application without building identity infrastructure from scratch. It acts as a central identity broker, handling SSO, MFA, user federation, and fine-grained authorization across web apps, APIs, and microservices. Built on Quarkus for a lightweight cloud-native footprint, it runs on bare metal, Docker, Kubernetes, and OpenShift. Its zero-licensing-cost model makes it especially attractive for large user bases where SaaS per-MAU fees would be prohibitive, at the cost of self-managed operational complexity.

Kinde

Rank #9 · 1.3% visibility

Kinde is an integrated developer platform providing authentication, authorization, billing, feature flags, and user management under a single SDK. It enables SaaS teams to add secure sign-in, multi-tenant access control, recurring subscription billing, and feature release management to their products with minimal code, positioning itself as an all-in-one infrastructure layer that lets founders focus on their core product rather than commodity infrastructure.