Stack Auth Alternatives & Competitors

Auth0 is a program for people to get authentication and authorization services for their own business use.

Key Auth0 features:

Ease of Use Security Scalability Customization

Open Source

Open Source Identity and Access Management for modern Applications and Services.

Key Keycloak features:

Open-Source Feature-Rich Customizability Integration Capability

Open Source

End-to-end encrypted password manager built for teams. Secure every login, share credentials safely, and keep all your business accounts protected with zero-knowledge encryption and Swiss privacy laws you can trust.

Key Proton Pass for Business features:

Privacy-Focused End-to-End Encryption Multi-Platform Support Open Source

Try for free Open Source paid Free Trial $1.99 / Monthly (Pass Essentials)

Clerk.io, the artificial intelligence for e-commerce that knows your customers interests.

Key Clerk features:

Personalization Ease of Integration Data-Driven Insights Automation

Open Source

The world's best login box, powered by WorkOS + Radix.

Empowering your journey from passwords to passkeys.

Key Hanko features:

Passwordless Authentication FIDO2 Standard Enhanced User Experience Developer-Friendly

Open Source

PropelAuth hosts and manages your authentication.

Key PropelAuth features:

Enterprise SSO/SAML Roles and Permissions (RBAC) 2FA Passwordless/Magic Links

freemium

The Identity Infrastructure for Modern B2B SaaS.

Key ZITADEL features:

OpenID Connect OAuth SAML2.0 Passkeys

Open Source freemium $100.0 / Monthly (1'000 Daily Active Users included)

Drag-and-drop authentication for your app.

Key Descope features:

Ease of Use Comprehensive Features Customizable Scalability

Security Building Blocks for the AI era! AI Security - LLM Vault, Authentication - SAML/OIDC SSO, Directory Sync (SCIM 2.0), Audit Logs, Data Privacy Vault, and more!

Key BoxyHQ features:

Ease of Integration Compliance Developer-Friendly Customizable

Open Source free $49.0 / Monthly (Per connection)

Clerk is a complete suite of embeddable UIs, flexible APIs, and admin dashboards to authenticate and manage your users.

Key Clerk Authentication features:

Multifactor Authentication Advanced security Session Management Email and SMS one-time passcodes

Open Source

Kinde provides Authentication tools and infrastructure to helps SaaS businesses accelerate their product development. Every day, Kinde gives the best teams in the world, everything they need to build, secure, monetize, and manage a more modern web.

Key Kinde features:

Passwordless Social SSO Enterprise SSO Multi-factor authentication

freemium $25.0 / Monthly (Professional plan starting from 10,500 monthly active users)

Authelia is an open-source authentication server providing SSO and two-factor for your applications running behind NGINX.

Key Authelia features:

Security Open Source Flexibility Single Sign-On

Open Source

Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.

Key AppWrite features:

Open Source Self-Hosted Comprehensive Backend Multi-Language Support

Open Source