Gluu Flex review
A broad, self-hosted OAuth and federation suite for organizations that need vendor support.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Gluu Flex is a commercially supported identity and access management distribution built around an open-source core. It is designed for organizations operating their own authentication and authorization environments, with support for OpenID Connect, SAML-based single sign-on, OAuth client management, dynamic registration, JWT access tokens, token introspection, client-credentials authentication, SCIM connections, and multifactor authentication. Its web-based Admin UI covers configuration, users, clients, scripts, metrics, and audit.
Pricing is organized by monthly active users. The 100 MAU plan costs $500 USD, the 400 MAU plan costs $1,750 USD, and the 1,600 MAU plan costs $6,125 USD. A 30-day trial license is available, but Flex does not have a permanent free plan. The plans provide a straightforward capacity-based starting point for teams evaluating a supported deployment, while the product itself covers both end-user authentication and machine-to-machine access through client credentials and token introspection.
Platform fit is a central strength. Flex supports web, Linux, and self-hosted deployments, with deployment options including Helm, Docker for development and testing, and VM packages for Ubuntu, SUSE, and Red Hat systems. Its ecosystem includes Google, Facebook, Apple, Microsoft Azure AD, Active Directory, Keycloak, and SCIM. Authentication options include FIDO, OTP, email, device flow, multifactor, and passwordless methods. Gluu Flex suits teams that need broad federation and API identity capabilities under their own operational control. Organizations seeking a hosted service, a permanent free tier, or AI features should choose an alternative.
Gluu Flex pros and cons
- Where it wins
- Supports OAuth/OIDC, SAML federation, SCIM, and dynamic registration
- Includes MFA, passwordless authentication, FIDO, OTP, and device flow
- Provides admin tooling for users, clients, scripts, metrics, and audit
- Where it doesn't
- No permanent free plan; the available trial lasts 30 days
- Self-hosted deployment requires your team to operate the environment
- No AI features are included
Gluu Flex fact sheet, pricing and score →
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