Stack Auth Alternatives

A

Auth0 (B2B)

significant switch cost

Flexible authentication and authorization platform for B2B applications, by Okta

Has free tier

A

Auth0 (B2C)

significant switch cost

Flexible authentication and authorization platform for B2C applications, by Okta

Has free tier

C

Cerbos

moderate switch cost

Policy-as-code authorization engine with YAML policies, audit logs, and managed PDP deployment

Has free tier

C

Clerk

significant switch cost

Authentication and user management platform with prebuilt UI components, OAuth/OIDC support, and enterprise SSO

Has free tier

D

Descope

significant switch cost

Drag-and-drop authentication and user management platform with visual workflow builder

Has free tier

F

Frontegg

significant switch cost

B2B SaaS authentication and user management platform with multi-tenancy

Has free tier

F

FusionAuth

moderate switch cost

Full-featured auth platform with self-hosting option and MAU-based cloud pricing

Has free tier

H

Hanko

moderate switch cost

Passkey-first authentication with generous free tier

Has free tier

K

Kinde

significant switch cost

Authentication and user management for modern apps with built-in feature flags

Has free tier

L

Logto

moderate switch cost

Open-source auth infrastructure with SSO, MFA, RBAC, organizations, and multi-tenancy

Has free tier

O

Ory

moderate switch cost

Open-source identity and auth infrastructure with aDAU-based pricing

Has free tier

P

Permit.io

significant switch cost

Authorization-as-a-service platform with RBAC, ABAC, and ReBAC policy management

Has free tier

P

PropelAuth

significant switch cost

B2B authentication with built-in organization management, RBAC, SAML SSO, and customizable UIs

Has free tier

S

Stytch

significant switch cost

Authentication and identity platform with passwordless and B2B auth

Has free tier

S

SuperTokens

moderate switch cost

Open-source auth with managed hosting and per-MAU add-on pricing

Has free tier

U

Unkey

moderate switch cost

API key management and rate limiting infrastructure for developers

Has free tier

W

WorkOS

significant switch cost

Enterprise-ready authentication and identity platform with SSO, directory sync, and user management

Has free tier

Z

Zitadel

moderate switch cost

Open-source identity management with DAU-based cloud pricing

Has free tier