Authelia
Best for self-hosting
Why teams pick it
Organizations needing SSO and 2FA for self-hosted applications behind reverse proxies
Open-source alternatives to Okta
Compare community-driven replacements for Okta in identity & sso workflows. We curate active, self-hostable options with transparent licensing so you can evaluate the right fit quickly.
Okta
Okta provides single sign-on, multi-factor authentication, and identity governance for secure access management. It serves both workforce identity and customer identity use cases.Read more
Key stats
- 18Alternatives
- 8Support self-hosting
Run on infrastructure you control
- 17Active development
Recent commits in the last 6 months
- 13Permissive licenses
MIT, Apache, and similar licenses
Counts reflect projects currently indexed as alternatives to Okta.
Start with these picks
These projects match the most common migration paths for teams replacing Okta.
Stack Auth
Privacy-first alternative
Why teams pick it
Keep customer data in-house with privacy-focused tooling.
All open-source alternatives
Authelia
Authentication and authorization server with SSO and 2FA
Self-host friendlyActive developmentPermissive licenseGo
Why teams choose it
- OpenID Connect 1.0 / OAuth 2.0 certified provider with comprehensive protocol support
- Multiple 2FA methods: FIDO2 WebAuthn security keys, TOTP, mobile push, and passwordless passkeys
- Fine-grained access control rules matching subdomain, user, group, URI, method, and network
Watch for
Still under active development with potential breaking changes between versions
Migration highlight
Securing self-hosted applications with SSO
Users authenticate once through Authelia's portal and gain access to multiple internal applications with consistent 2FA enforcement across all services.
Stack Auth
Fast, developer-friendly authentication with built-in dashboard and RBAC
Self-host friendlyActive developmentPrivacy-firstTypeScript
Why teams choose it
- Prebuilt `<SignIn/>` / `<SignUp/>` components with OAuth, password and magic‑link support
- Built-in user dashboard and account settings UI
- Multi‑tenancy, teams, and role‑based access control
Watch for
Primarily targets JavaScript/Node ecosystems
Migration highlight
SaaS product launch
Launches with instant sign-up, email verification, and passwordless login, reducing time-to-market.
Vouch Proxy
Unified SSO gateway for Nginx using OAuth and OIDC
Permissive licenseFast to deployIntegration-friendlyGo
Why teams choose it
- Supports 30+ OAuth and OpenID Connect providers
- Integrates via Nginx auth_request module
- Domain‑wide cookie sharing for seamless SSO
Watch for
Requires Nginx with auth_request module
Migration highlight
Protect multiple microservices behind a single domain
Users authenticate once via Google and gain access to all services without re‑login.
ZITADEL
Multi‑tenant identity platform delivering secure, self‑service authentication.
Active developmentFast to deployIntegration-friendlyGo
Why teams choose it
- API‑first design with GRPC & REST endpoints
- Native multi‑tenant architecture with self‑service UI
- Comprehensive authentication methods (OIDC, OAuth2, SAML, Passkeys, MFA)
Watch for
Requires PostgreSQL (v14+) as an external dependency
Migration highlight
Secure React SPA with OIDC PKCE
Implement OpenID Connect Authorization Code flow with PKCE, enabling seamless login and token handling using ZITADEL’s OIDC endpoints.
authentik
Open-source Identity Provider for modern SSO and authentication
Self-host friendlyActive developmentPrivacy-firstPython
Why teams choose it
- Multi-protocol support: SAML, OAuth2/OIDC, LDAP, RADIUS in one platform
- Scales from Docker Compose labs to Kubernetes production clusters
- Enterprise IdP replacement for Okta, Auth0, Entra ID, and Ping Identity
Watch for
Self-hosting requires infrastructure management and maintenance overhead
Migration highlight
Enterprise IdP Migration
Replace Okta or Auth0 with self-hosted authentik, reducing licensing costs while maintaining SAML and OIDC integrations across all applications
Keycloak
Open Source Identity and Access Management for Modern Applications
Self-host friendlyActive developmentPermissive licenseJava
Why teams choose it
- User federation with existing LDAP and Active Directory systems
- Standards-based authentication via OIDC and SAML protocols
- Fine-grained authorization and centralized user management
Watch for
Java-based stack may require JVM expertise for customization
Migration highlight
Multi-Application SSO
Users authenticate once and access multiple internal applications without re-entering credentials, improving security and user experience.
Ory Kratos
API‑first identity server for secure, scalable user management
Active developmentPermissive licenseFast to deployGo
Why teams choose it
- API‑first identity management with RESTful endpoints
- Built‑in MFA, passwordless, and social login flows
- Pre‑packaged UI components and Ory Console for admin tasks
Watch for
Self‑hosting requires operational expertise
Migration highlight
Passwordless login for mobile app
Reduces friction for users while enhancing security through WebAuthn.
Authlib
Spec-compliant Python library for OAuth and OpenID Connect
Active developmentPermissive licenseIntegration-friendlyPython
Why teams choose it
- Complete OAuth 1.0/2.0 and OpenID Connect 1.0 client and server implementations
- Full JOSE suite: JWS, JWE, JWK, JWA, JWT with RFC-compliant cryptography
- Native integrations for Flask, Django, Starlette, FastAPI with sync and async support
Watch for
Deprecating authlib.jose module in favor of separate joserfc library requires migration
Migration highlight
Multi-Tenant SaaS Authorization Server
Deploy a compliant OAuth 2.0 provider with PKCE, token introspection, and dynamic client registration for enterprise customers
SuperTokens
Self‑hosted authentication platform delivering secure login and sessions.
Active developmentFast to deployIntegration-friendlyJava
Why teams choose it
- Passwordless and social login options
- Built‑in session verification and refresh
- Multi‑tenant and role‑based access control
Watch for
Requires self‑hosting and operational overhead
Migration highlight
Passwordless login for a mobile app
Users sign in via email link or SMS, reducing friction and improving conversion.
Kanidm
Simple, secure identity management platform with everything built-in
Active developmentPermissive licenseIntegration-friendlyRust
Why teams choose it
- Passkey and attested WebAuthn authentication with OAuth2/OIDC SSO built-in
- Linux/Unix integration with TPM-protected offline auth and SSH key distribution
- High-performance internal database with two-node replication—no external SQL required
Watch for
Primary administration via CLI; WebUI focused on user self-service, not admin tasks
Migration highlight
Replace FreeIPA for Linux/Unix Identity
Faster performance, simpler upgrades, and integrated passkey authentication without Kerberos complexity
Dex
Federated OpenID Connect identity service with pluggable connectors
Active developmentPermissive licenseIntegration-friendlyGo
Why teams choose it
- Federated authentication via 15+ connectors including LDAP, SAML, GitHub, Google, and Active Directory
- Issues signed OpenID Connect ID Tokens (JWTs) with standard claims for user identity, email, and groups
- Native Kubernetes integration with Custom Resource Definitions and API server OpenID Connect plugin
Watch for
Connector limitations can prevent refresh tokens or group claims depending on upstream protocol
Migration highlight
Kubernetes Cluster Authentication
Users log in to Kubernetes via GitHub or Active Directory; kubectl and dashboard authenticate through dex-issued ID Tokens without managing multiple credential systems.
Better Auth
Comprehensive authentication and authorization library for TypeScript
Self-host friendlyActive developmentPermissive licenseTypeScript
Why teams choose it
- Framework-agnostic design works across any TypeScript environment
- Plugin ecosystem for 2FA, multi-tenant, OAuth, and SSO with minimal code
- Comprehensive authorization features alongside authentication primitives
Watch for
TypeScript-only focus may not suit polyglot development environments
Migration highlight
Multi-Tenant SaaS Platform
Deploy isolated authentication per tenant with role-based access control using built-in plugins, eliminating weeks of custom development.
Logto
Modern auth infrastructure for SaaS and AI apps
Self-host friendlyActive developmentPermissive licenseTypeScript
Why teams choose it
- Multi-tenancy with organization RBAC, SSO, and just-in-time provisioning
- SDKs for 30+ frameworks with pre-built, customizable sign-in flows
- Full OIDC, OAuth 2.1, and SAML support without protocol complexity
Watch for
MPL-2.0 license requires disclosure of modifications to Logto source files
Migration highlight
Multi-tenant B2B SaaS authentication
Deploy organization-based access control with SSO, RBAC, and member provisioning in days instead of months
Apereo CAS
Enterprise Single Sign-On and Identity Provider for Web
Active developmentPermissive licenseFast to deployJava
Why teams choose it
- Multi-protocol support: CAS, SAML2, OAuth2, OpenID Connect, WS-Federation
- Extensive authentication backends including LDAP, RDBMS, X.509, RADIUS, and social providers
- Built-in MFA with Duo Security, YubiKey, Google Authenticator, WebAuthn FIDO2
Watch for
Java-based deployment requires JVM expertise and infrastructure
Migration highlight
University Campus SSO
Students and faculty authenticate once to access learning management systems, email, library resources, and administrative portals using LDAP credentials with MFA enforcement.
SSOReady
Add SAML and SCIM to any app in minutes
Active developmentPermissive licenseIntegration-friendlyTypeScript
Why teams choose it
- Two‑line SAML integration and one‑line SCIM call
- Language‑agnostic SDKs over a unified HTTP API
- Self‑serve onboarding UI for customer‑managed IdPs
Watch for
Enterprise features require a paid plan
Migration highlight
Add SSO button to SaaS dashboard
Users can sign in via their corporate IdP with two lines of code.
Hanko
Privacy-first, framework-agnostic authentication and user management platform
Self-host friendlyActive developmentPrivacy-firstGo
Why teams choose it
- Supports passwords, passkeys, MFA, OAuth, SAML, and social logins
- Framework-agnostic Hanko Elements web components for quick UI integration
- API-first backend with JWT, session revocation, and webhooks
Watch for
AGPL-3.0 license may restrict commercial use without a separate license
Migration highlight
Passwordless login for a SaaS dashboard
Users authenticate via WebAuthn passkeys, eliminating passwords and reducing phishing risk.
Casdoor
UI-first IAM and SSO platform with comprehensive protocol support
Self-host friendlyActive developmentPermissive licenseGo
Why teams choose it
- Comprehensive protocol support: OAuth 2.0, OIDC, SAML, LDAP, SCIM, RADIUS, and CAS
- Modern authentication methods including WebAuthn, TOTP, MFA, and Face ID
- Enterprise integrations with Google Workspace, Active Directory, and Kerberos
Watch for
Self-hosted deployment requires infrastructure management and maintenance
Migration highlight
Multi-Application SSO for SaaS Platform
Users authenticate once and access multiple internal applications seamlessly using OAuth 2.0 or OIDC, reducing password fatigue and improving security.
Tesseral
Scalable API‑first auth platform for B2B SaaS
Active developmentPermissive licenseIntegration-friendlyTypeScript
Why teams choose it
- Hosted, brandable login pages with click‑to‑add authentication methods
- Built‑in B2B multitenancy and self‑service admin UI for each customer
- Zero‑code integration of SSO, MFA, Passkeys, API keys and RBAC
Watch for
Self‑hosting requires own cloud resources and ops
Migration highlight
Enterprise customer onboarding
Admins invite users, configure SSO and enforce MFA from a self‑service console.
Choosing a identity & sso alternative
Teams replacing Okta in identity & sso workflows typically weigh self-hosting needs, integration coverage, and licensing obligations.
- 8 projects let you self-host and keep customer data on infrastructure you control.
- 17 options are actively maintained with recent commits.
Tip: shortlist one hosted and one self-hosted option so stakeholders can compare trade-offs before migrating away from Okta.