14 Best Open Source Okta Alternatives in 2026

1

Keycloak

Established open-source identity and access management

Apache-2.0 IAM platform providing SSO, social login, LDAP and Active Directory federation, OpenID Connect, OAuth 2.0, SAML, MFA, user management, authorization policies, and customizable authentication flows.

Pricing: Free and open source; self-hosted or operated through third-party services.

• OIDC, OAuth, SAML, LDAP, and Active Directory
• SSO, social login, MFA, federation, and fine-grained authorization
• Mature ecosystem and enterprise adoption
• Complex configuration and steep learning curve
• Heavier operational footprint than auth libraries
• Custom themes and flows can require significant expertise

2

Better Auth

TypeScript-first authentication framework for applications

MIT authentication and authorization framework that runs inside a TypeScript application rather than as a standalone identity service. Supports email/password, social login, two-factor authentication, organizations, sessions, and an extensible plugin ecosystem.

Pricing: Open-source framework; you operate the application and its infrastructure.

• MIT license and TypeScript-first design
• Framework-agnostic with email/password, social login, and 2FA
• Organizations, sessions, plugins, and type-safe API without a separate identity server
• Not a managed Auth0-style service by itself
• Authentication responsibilities remain in your application
• Enterprise federation may require additional setup

3

authentik

Self-hosted identity provider for SSO and enterprise IAM

Identity provider with an MIT-licensed core and a separate Enterprise offering. Supports OAuth2/OIDC, SAML, LDAP, RADIUS, SCIM, proxy authentication, MFA, conditional flows, and application access management.

Pricing: Self-hosted open-source core; Enterprise features and support are commercial.

• OIDC, OAuth2, SAML, LDAP, RADIUS, and SCIM
• MFA, proxy provider, and custom authentication flows
• Docker and Kubernetes support with broad homelab and enterprise adoption
• More infrastructure than an in-app authentication library
• Enterprise functionality exists separately
• Configuration can become complex

4

SuperTokens

Developer-oriented authentication platform and SDKs

Open-core authentication platform with Apache-2.0 core and separately licensed Enterprise code under ee/. Supports password and passwordless login, social sign-in, sessions, user management, access control, multi-tenancy, and backend and frontend SDKs.

Pricing: Self-hosted open-source core and managed cloud; Enterprise components are separately licensed.

• Apache-2.0 core with self-hosting and managed cloud
• Password, passwordless, and social authentication with session management
• Multi-tenancy and developer-friendly frontend/backend SDKs
• Enterprise components use separate licensing
• Less complete workforce IAM than Keycloak
• SAML and enterprise federation are not central to the open-source core

5

ZITADEL

Identity infrastructure for SaaS and B2B applications

AGPL-3.0 identity platform with limited directory exceptions, providing OIDC, OAuth2, SAML, SCIM, MFA, passkeys, organizations, multi-tenancy, audit logs, roles, APIs, managed cloud, and self-hosting.

Pricing: Managed cloud and self-hosted deployment options.

• OIDC, OAuth2, SAML, and SCIM
• Passkeys, MFA, organizations, multi-tenancy, and audit logs
• API-first B2B SaaS fit with hosted cloud and self-hosting
• More complex than lightweight authentication libraries
• AGPL terms require consideration for modified network deployments
• Smaller integration ecosystem than Auth0

6

Logto

OIDC and OAuth 2.1 authentication and authorization platform

MPL-2.0 platform with login flows, social authentication, MFA, organizations, SSO, RBAC, machine-to-machine authentication, connectors, and SDKs for many frameworks. Supports self-hosting and hosted service.

Pricing: Self-hosted open-source edition and hosted cloud service; some advanced services are cloud-oriented.

• OIDC and OAuth 2.1
• Password and passwordless login, social auth, MFA, organizations, and SSO
• RBAC, machine-to-machine auth, connectors, and 30+ framework SDKs
• Younger than Keycloak
• Smaller enterprise ecosystem
• Some advanced services are cloud-oriented

7

Ory

Modular open-source identity and access infrastructure

Apache-2.0 core identity stack including Kratos for identity and authentication, Hydra for OAuth2/OIDC, and Keto for authorization. Provides headless APIs, passkeys, social login, MFA, cloud-native deployment, Kubernetes support, and self-hosting; some enterprise features use commercial agreements.

Pricing: Self-hosted open-source components and managed services; enterprise features are commercial.

• Modular components for authentication, OAuth/OIDC, and authorization
• Apache-2.0 core with passkeys, social login, MFA, and headless APIs
• Cloud-native and Kubernetes-friendly with self-hosting
• Requires more architecture decisions
• Multiple components may be needed
• Enterprise functionality is separately licensed and less turnkey than Auth0

8

Pocket ID

Lightweight self-hosted OIDC provider centered on passkeys

BSD-2-Clause OpenID Connect and OAuth 2.0 identity provider that deliberately keeps its feature set small and uses passkeys as the only user authentication method. Includes LDAP synchronization, SCIM, groups, audit logs, REST API, and simple Docker deployment.

Pricing: Free and open source; self-hosted deployment.

• Lightweight passkey-only login and OIDC certification
• OAuth 2.0, LDAP synchronization, SCIM, and groups
• Audit logs, REST API, and simple Docker deployment
• Intentionally limited scope
• Passkeys only
• Less suitable for complex B2C flows or a broad hosted-login ecosystem

9

Hanko

Authentication platform built around passkeys

AGPL-3.0 authentication platform for passwords and passwordless login, email passcodes, social sign-in, SSO, MFA, WebAuthn passkeys, web components, and self-service profiles. Available as self-hosted software or Hanko Cloud.

Pricing: Open-source self-hosted option and managed cloud service.

• Passkeys are a first-class feature alongside passwords
• Email passcodes, social login, SSO, and MFA
• Web components, self-service profiles, self-hosting, and cloud option
• Smaller ecosystem than Keycloak
• Less extensive enterprise federation
• More focused on authentication than workforce IAM

10

Hexclave

Self-hostable user infrastructure for SaaS products

Open-source-codebase self-hostable platform combining authentication and authorization with teams, multi-tenancy, payments, billing, transactional email, analytics, passkeys, and API keys. Broader than a conventional identity provider.

Pricing: Open source and self-hostable; enterprise licenses and a hosted service are available.

• Authentication, authorization, teams, and multi-tenancy
• Payments, billing, email, analytics, passkeys, and API keys
• Designed as broader infrastructure for SaaS applications
• Much broader than Auth0
• Younger project with smaller ecosystem
• Extra modules may be unnecessary for teams needing only authentication

11

Permify

Fine-grained authorization service inspired by Zanzibar

AGPL-3.0 self-hosted authorization service for RBAC, ABAC, and relationship-based access control. It evaluates what authenticated users may do; it does not provide Auth0-style authentication or user login.

Pricing: Open-source self-hosted service; hosted offerings may be separate.

• RBAC, ABAC, and ReBAC with Zanzibar-style relationships
• Centralized policy engine and API-based permission checks
• Self-hosted authorization service
• Does not authenticate users
• Not a direct Auth0 replacement
• Must be paired with an identity provider and adds infrastructure

12

Cerbos

Policy-as-code authorization engine

Apache-2.0 core authorization engine that evaluates policies through local or remote decision points. Supports RBAC, ABAC, YAML policies, GitOps workflows, language-agnostic SDKs, and self-hosting; enterprise management features are separate.

Pricing: Open-source self-hosted engine; enterprise management features are separate.

• RBAC and ABAC policies as code
• YAML policies and GitOps workflows
• Language-agnostic SDKs and stateless low-latency decision points
• Does not provide user authentication
• Requires an existing identity provider
• Enterprise management features are separate

13

Defguard

Self-hosted WireGuard VPN with identity, MFA, and access control.

Defguard is an AGPL-core WireGuard access platform combining identity management, OpenID Connect, MFA, device management, access policies, and security auditing. Enterprise functionality uses a separate license.

Pricing: AGPL core is self-hostable; Enterprise functionality and support may be paid.

• WireGuard and self-hosting
• Built-in MFA and OpenID Connect
• Identity, devices, policies, and audits
• Open core
• More identity-oriented than ZeroTier
• More infrastructure to operate

14

Authgear

Open-source identity and access management for B2B and B2C

Apache-2.0 authentication and IAM server with passwords, passwordless and social login, MFA, biometrics, passkeys, SSO, user management, and authorization. Can be self-hosted or used through Oursky's managed service.

Pricing: Self-hosted server and managed service options.

• Apache-2.0 with password and passwordless sign-in
• Social login, MFA, biometrics, passkeys, and SSO
• B2B and B2C user management, authorization, and self-hosting
• Much smaller community and fewer integrations than Auth0
• Managed-product documentation is more prominent
• Smaller ecosystem than Keycloak or ZITADEL