Apache Syncope vs Gluu Flex
A side-by-side comparison of two self-hosted identity & sso options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Apache Syncope | Gluu Flex |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 77 · Good | 69 · Good |
| Category | Identity & SSO | Identity & SSO |
| License | Apache-2.0 | Apache-2.0 |
| Language | Java | TypeScript |
| Setup difficulty | Hard | Hard |
| Min. RAM | 2,048 MB | 4,096 MB |
| Deployment | docker, kubernetes, bare-metal | docker, kubernetes, helm |
| GitHub stars | ★ 341 | ★ 31 |
| First released | 2012 | 2009 |
| Replaces | SailPoint, Okta | Okta, Ping Identity |
What are Apache Syncope and Gluu Flex?
Apache Syncope
Apache Syncope is an open-source system for managing digital identities in enterprise environments. It handles identity lifecycle, provisioning, governance and access management with workflow support.
- Identity lifecycle management
- Provisioning to many connected systems
- Workflow-driven approvals
- Reporting and auditing
Gluu Flex
Gluu provides a self-hostable identity platform for single sign-on, multi-factor authentication, and access management built on open standards. It supports OAuth, OIDC, SAML, and FIDO2.
- Single sign-on
- OAuth, OIDC and SAML
- FIDO2 strong authentication
- Kubernetes deployment
Apache Syncope vs Gluu Flex: key differences
Apache Syncope is written in Java, while Gluu Flex is built with TypeScript. Apache Syncope is the lighter option, starting around 2,048 MB of RAM against 4,096 MB for Gluu Flex. Gluu Flex is the more established project (first released 2009), while Apache Syncope arrived in 2012. Apache Syncope has the considerably larger community, at 341 GitHub stars versus 31.
Why pick each one
Choose Apache Syncope if…
- Strong identity governance features
- Standards based
Watch out for
- Complex enterprise-oriented setup
Choose Gluu Flex if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Kubernetes-ready with Helm charts available
- Written in TypeScript
Frequently asked questions
Is Apache Syncope or Gluu Flex better?
Neither is universally better. Apache Syncope has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Apache Syncope and Gluu Flex free and open-source?
Yes. Apache Syncope is licensed under Apache-2.0 and Gluu Flex under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Apache Syncope and Gluu Flex with Docker?
Apache Syncope: yes. Gluu Flex: yes.
Which is lighter on resources, Apache Syncope or Gluu Flex?
Apache Syncope has the smaller minimum footprint at 2,048 MB of RAM, compared to about 4,096 MB for Gluu Flex. Real-world usage depends on library size, user count, and enabled features.