Open Source Keycloak Alternatives

The best open source alternative to Keycloak is Authelia. If that doesn't suit you, our users have ranked more than 50 alternatives to Keycloak and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Keycloak are LemonLDAP::NG, FreeIPA, Pomerium and authentik.

Keycloak alternatives are mainly Identity Management Tools but may also be Reverse Proxy Servers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Keycloak.

Keycloak alternatives page was last updated

Keycloak

Free • Open Source
Identity Management Tool

Linux
Self-Hosted

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

Learn more about Keycloak

Authelia
Is this is a good alternative?
Yes
No
Free • Open Source
Identity Management Tool
Reverse Proxy Server
Self-Hosted
Kubernetes
Docker
9 Authelia alternatives
Authelia is an open-source authentication and authorization server providing two-factor authentication and single sign-on (SSO) for your applications via a web portal. It acts as a companion for reverse proxies like nginx, Traefik or HAProxy to let them know whether requests...
- - Authelia is the most popular Self-Hosted alternative to Keycloak.
- - Authelia is the most popular Open Source & free alternative to Keycloak.
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Authelia Features
1. Two-factor AuthenticationAuthelia supports two-factor authentication (2FA).
Support for Docker
Kubernetes
Single Sign-On
Ngnix support
Golang
LemonLDAP::NG
Is this is a good alternative?
Yes
No
Free • Open Source
Identity Management Tool
Windows
Linux
Self-Hosted
16 LemonLDAP::NG alternatives
LemonlLDAP::NG is a modular Web-SSO based on Apache::Session modules. It simplifies the build of a protected area with a few changes in the application. It manages both authentication and authorization and provides headers for accounting.
- - LemonLDAP::NG is the most popular Windows & Linux alternative to Keycloak.
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LemonLDAP::NG Features
1. Two-factor AuthenticationLemonLDAP::NG supports two-factor authentication (2FA).
Access Control
SAML Single Sign-On
Single Sign-On
OpenID Connect
Support for Docker
Dockerized
OpenID Provider
FreeIPA
Is this is a good alternative?
Yes
No
Free • Open Source
Linux
16 FreeIPA alternatives
FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 Directory Server, MIT Kerberos, NTP, DNS, Dogtag (Certificate System). It consists of a web interface and command-line administration tools.
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FreeIPA Features
DNS Server
LDAP Services
Kerberos
Web interface
Pomerium
Is this is a good alternative?
Yes
No
Free Personal • Open Source
Reverse Proxy Server
Linux
Self-Hosted
Kubernetes
Docker
6 Pomerium alternatives
Pomerium is an identity and context-aware proxy that enables secure access to applications without a client. Pomerium provides a standardized interface to add access control to applications regardless of whether the application itself has authorization or authentication baked-in.
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Pomerium Features
1. Two-factor AuthenticationPomerium supports two-factor authentication (2FA).
Single Sign-On
OAUTH
authentik
Is this is a good alternative?
Yes
No
Free • Open Source
Identity Management Tool
Self-Hosted
34 authentik alternatives
authentik is an open-source identity provider focused on flexibility and versatility.
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authentik Features
1. Two-factor Authenticationauthentik supports two-factor authentication (2FA).
Self-hosted
Access Control
LDAP support
Single Sign-On
Gluu Server
Is this is a good alternative?
Yes
No
Freemium • Open Source
Identity Management Tool
Online
Self-Hosted
35 Gluu Server alternatives
The Gluu Server is a container distribution of free open source software (FOSS) for identity and access management (IAM). SaaS, custom, open source and commercial web and mobile applications can leverage a Gluu Server for user authentication, identity information, and policy...
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Gluu Server Features
1. Two-factor AuthenticationGluu Server supports two-factor authentication (2FA).
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ZITADEL
Is this is a good alternative?
Yes
No
Free • Open Source
Identity Management Tool
Online
Self-Hosted
16 ZITADEL alternatives
Secure authentication management for your application. Customize as you grow, with easy APIs and programmable workflows. Focus on growing, your login is in good hands.
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ZITADEL Features
1. Two-factor AuthenticationZITADEL supports two-factor authentication (2FA).
2. Biometric AuthenticationLog in or unlock your device using your fingerprint or face recognition
Passwordless
Multi-Factor Authentication (MFA)
Login
SAML Single Sign-On
OpenID Provider
Single Sign-On
User Management
LDAP support
CAS
Is this is a good alternative?
Yes
No
Free • Open Source
Mac
Windows
Linux
Online
Self-Hosted
14 CAS alternatives
Apereo CAS - Enterprise Single Sign On for the Web.
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CAS Features
Single Sign-On
Ory
Is this is a good alternative?
Yes
No
Freemium • Open Source
Identity Management Tool
Software as a Service (SaaS)
Online
Windows
Android
Mac
Linux
iPhone
Self-Hosted
iPad
45 Ory alternatives
Ory builds cloud-native authentication (login), authorization (permission), delegation (OAuth2, OpenID Connect), and user management software. You can deploy what you need yourself or use the Ory Network and get started in minutes.
- - Ory is the most popular Android, iPhone & iPad alternative to Keycloak.
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Ory Features
1. Two-factor AuthenticationOry supports two-factor authentication (2FA).
2. Biometric AuthenticationLog in or unlock your device using your fingerprint or face recognition
Access Control
OpenID Provider
User Management
Multi-cloud access control
OpenID Connect
Single Sign-On
Add a screenshot
Authorizer (authentication)
Is this is a good alternative?
Yes
No
Free • Open Source
Identity Management Tool
Self-Hosted
18 Authorizer (authentication) alternatives
Your data, your control. Fully open source, authentication and authorization. No lock-ins. Deployment in Railway.app | Heroku in 120 seconds || Spin a docker image as a micro-service in your infra. Built in login page and Admin panel out of the box.
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Authorizer (authentication) Features
1. Two-factor AuthenticationAuthorizer (authentication) supports two-factor authentication (2FA).
Support for Docker
Golang
Membership Management
GraphQL
Logto
Is this is a good alternative?
Yes
No
Free • Open Source
Identity Management Tool
Self-Hosted
42 Logto alternatives
Logto helps you build the sign-in, auth, and user identity within minutes. We provide an OIDC-based identity service and the end-user experience with username, phone number, email, and social sign-in, for web and native apps.
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Logto Features
1. Dark ModeLogto supports dark mode for comfortable usage in low light conditions.
User Management
Passwordless
OAUTH
Frontegg
Is this is a good alternative?
Yes
No
Free • Open Source
Mac
Windows
Online
Software as a Service (SaaS)
17 Frontegg alternatives
Frontegg is a developer platform that enables product-led-growth through a customer-facing user-management interface embedded seamlessly within any product.
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Frontegg Features
Reporting
User Management
Single Sign-On
Slack integration
Multi-Factor Authentication (MFA)
Team management
SLA
Login
WebHook Integration