Clerk
Free planB2C and B2B SaaS shipping auth in days on Next.js or React
Authentication and user management platform for sign-in, sessions, and modern app identity.
Tools directory
Category context
Selected viewFor developers who need reliable, scalable auth without building it from scratch.
Clerk
Free planB2C and B2B SaaS shipping auth in days on Next.js or React
Authentication and user management platform for sign-in, sessions, and modern app identity.
Auth0
Free planB2B SaaS selling into buyers expecting SAML, SCIM, and audit evidence
Identity platform for adding authentication, user management, SSO, and access control to apps.
FusionAuth
Free planCustomer identity
Authentication and user-management platform with self-hosted roots, public tiered pricing, and…
Logto
Free planCustomer identity and access management
Open-source identity platform for authentication, organizations, SSO, MFA, machine-to-machine…
SuperTokens
Free planAuthentication
Authentication platform with open-source self-hosting, usage-based cloud pricing, and add-on…
WorkOS Radar
Free planBot protection
Realtime bot, fraud, and abuse protection from WorkOS for signups, auth flows, device…
Kinde
Free planSaaS authentication and user management
Authentication, user management, feature flags, and billing infrastructure for modern SaaS…
SpiceDB
Free planFine-grained permissions infrastructure
Open-source Zanzibar-inspired authorization database from AuthZed, with managed cloud and…
Frontegg
Free planCustomer identity and access for B2B SaaS products
Customer identity and access platform for B2B SaaS with a free tier, enterprise connections…
Permit.io
Free planFine-grained authorization for B2B SaaS products
Authorization platform for RBAC, ABAC, ReBAC, and policy workflows with a free tier and…
Ory
Free planAuthentication and identity infrastructure for serious web products
Identity infrastructure platform with free developer usage, production SaaS plans, and…
Stack Auth
Free planAuth for Next.js SaaS products
Open-source authentication platform for Next.js and React apps with hosted or self-hosted…
Casbin
Free planApplication authorization and policy enforcement
Open-source authorization library for ACL, RBAC, ABAC, ReBAC, and other access-control models…
ZITADEL
Free planAuthentication and identity for SaaS products
Identity platform with free cloud usage, a $100/month pro tier, and self-hosted or enterprise…
Cedar
Free planAuthorization policy language
Open-source policy language for authorization decisions, maintained in the open and used by…
Auth.js
Free planNext.js products that need custom-branded auth without Clerk
Open-source auth library for JavaScript apps with OAuth, email, and credentials support.
Descope
Free planTeams iterating onboarding without shipping frontend for every copy change
Authentication platform for passkeys, MFA, SSO, and user journeys with flexible developer…
Firebase Auth
Free planMobile and web apps already using Firebase or planning to
Authentication service for Firebase apps with email, phone, social login, and client SDKs.
Keycloak
Free planSelf-hosted SSO for dozens of internal apps
Open-source identity and access management platform for SSO, user federation, roles, and…
Lucia
Free planTeams wanting minimal session layer over SQL
Lightweight authentication library for session-based auth in JavaScript and TypeScript apps.
Magic
Free planConsumer web3 apps onboarding non-power-users
Passwordless authentication platform for secure sign-in flows across web and mobile apps.
Okta
Free planEnterprise workforce SSO and MFA across a broad SaaS portfolio
Enterprise identity platform for SSO, MFA, lifecycle management, and secure app access.
Stytch
Free planB2B SaaS standardizing orgs, SSO, and SCIM with developer-friendly APIs
Authentication platform for passwordless login, OAuth, MFA, and B2B identity workflows.
Supabase Auth
Free planSupabase-backed apps that want auth without a separate user store
Authentication service for apps with sign-in, user management, and database-connected auth…