2FAuth vs Keycloak
A side-by-side comparison of two self-hosted identity & sso options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
2FAuth
Self-hosted web app to manage two-factor authentication codes
VS
Keycloak
Open-source identity and access management for modern apps
| Feature | 2FAuth | Keycloak |
|---|---|---|
| Category | Identity & SSO | Identity & SSO |
| License | AGPL-3.0 | Apache-2.0 |
| Language | PHP | Java |
| Setup difficulty | Easy | Hard |
| Min. RAM | 256 MB | 1,024 MB |
| Deployment | docker, source | docker, kubernetes, bare-metal |
| GitHub stars | ★ 4,090 | ★ 36,058 |
| First released | 2020 | 2014 |
| Replaces | Authy, Google Authenticator | Okta, Auth0, Microsoft Entra ID |
Why pick each one
Choose 2FAuth if…
- Released under the AGPL-3.0 license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Active community (4.1k GitHub stars)
Frequently asked questions
Is 2FAuth or Keycloak better?
Neither is universally better. Keycloak has the larger community, while 2FAuth is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are 2FAuth and Keycloak free and open-source?
Yes. 2FAuth is licensed under AGPL-3.0 and Keycloak under Apache-2.0. Both can be self-hosted at no software cost.
Can I run 2FAuth and Keycloak with Docker?
2FAuth: yes. Keycloak: yes.