Head-to-Head Comparison · Alternative to Auth0 · 🔐 security
Auth0 vs KeyCloak
Secure applications with minimal effort. Here is how KeyCloak ($0/mo open source) stacks up against Auth0 ($35/mo) across cost, hosting, data privacy, and real-world trade-offs.
KeyCloak
$0.00/mo · cm0zfrz5200pu94snwyqzpqx7
Auth0 vs KeyCloak Specification Matrix
facts verified 2026-11-04
| Dimension | Auth0 (Paid) | KeyCloak (Replacement) |
|---|---|---|
| Monthly Price | $35 / mo | $0 / mo |
| 1-Year Cost (1 seat) | $420 / yr | $0 / yr (Save $420) |
| 1-Year Cost (5 seats) | $2,100 / yr | $0 / yr (Save $2,100) |
| 1-Year Cost (10 seats) | $4,200 / yr | $0 / yr (Save $4,200) |
| Source & License | Proprietary SaaS | open source cm0zfrz5200pu94snwyqzpqx7 |
| Where It Runs | Vendor Cloud | Self-host (your server) |
| Platforms | Web / Cloud | webself-hosteddocker to self-host |
| GitHub Stars | — | ★ 37.7k (active nov 2026) |
Deep Dive: Switching from Auth0 to KeyCloak
Trade-offs, installation & data architecture
What you trade away
Requires self-hosting setup, updates, and server maintenance compared to managed Auth0.
How to deploy KeyCloak
Clone https://github.com/keycloak/keycloak or deploy with Docker Compose
What it takes to run
Deploy via Docker or binary release from GitHub and configure environment variables.
Where your data lives
All application data and configuration live on your own server or local database.
Why fork KeyCloak instead of vibe-coding a Auth0 clone?
Instead of paying recurring SaaS fees for Auth0 or rebuilding it from scratch, deploy one of the 5 battle-tested open-source alternatives like KeyCloak or Authentik.
Auth0 vs KeyCloak FAQ
Is KeyCloak a good free alternative to Auth0?+
Yes. KeyCloak is a verified open-source (cm0zfrz5200pu94snwyqzpqx7) replacement for Auth0. Secure applications with minimal effort.
What is the catch when switching from Auth0 to KeyCloak?+
Requires self-hosting setup, updates, and server maintenance compared to managed Auth0.
How much do you save switching from Auth0 to KeyCloak?+
Auth0 costs $35/mo ($420/yr) per seat, whereas KeyCloak is $0/mo. Switching saves $420/yr for a solo user, $2,100/yr for a 5-person team, and $4,200/yr for a 10-person team.
How do I install or self-host KeyCloak instead of Auth0?+
Install: Clone https://github.com/keycloak/keycloak or deploy with Docker Compose. Setup: Deploy via Docker or binary release from GitHub and configure environment variables.