Keycloak vs Auth0: Which Should You Choose in 2026?
Choosing between Keycloak and Auth0 comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated February 28, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Keycloak
Open-source identity and access management
Best for you if:
- • You need something completely free
- • You need password managers features specifically
- • Keycloak is an open-source identity and access management solution
- • It provides SSO, social login, and user federation for applications and services
Auth0
Identity platform for developers
Best for you if:
- • You need api tools features specifically
- • Industry-leading identity platform
- • Authentication and authorization as a service
| At a Glance |  Auth0 | |
|---|---|---|
Price | Free | Free + Paid |
Best For | Password Managers | API Tools |
Rating | 88/100 | 88/100 |
| Feature | Keycloak | Auth0 |
|---|---|---|
| Pricing Model | Free | Freemium |
| Editorial Score | 88 | 88 |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Password ManagersIdentity & Access | API ToolsIdentity & Access |
How Keycloak and Auth0 Compare
Keycloak
Open-source identity and access management
Free · 88/100 score
Auth0
Identity platform for developers
Free tier available · 88/100 score
Keycloak is a password managers tool. Auth0 is in api tools.
Who Should Use What?
On a budget?
Keycloak is free. Auth0 is freemium.
Go with: Keycloak
Want the highest-rated option?
Keycloak: 88/100. Auth0: 88/100.
Go with: Keycloak
Value user reviews?
Neither has user reviews yet.
Go with: Keycloak
3 Questions to Help You Decide
What's your budget?
Keycloak is free. Auth0 is freemium. Go with Keycloak if free matters most.
What's your use case?
Keycloak is a password managers tool. Auth0 is in api tools. Pick the category that matches your needs.
How important are ratings?
Both score 88/100.
Key Takeaways
Keycloak
- Completely free
- Our pick for this comparison
Auth0
- Better fit for api tools
The Bottom Line
Keycloak (88/100) is our pick.
Frequently Asked Questions
Is Keycloak or Auth0 better?
Keycloak scores 88/100 in our evaluation. Keycloak is free and Auth0 is freemium.
What are Keycloak and Auth0 used for?
Keycloak: Open-source identity and access management. Auth0: Identity platform for developers.
What does Keycloak cost vs Auth0?
Keycloak is completely free. Auth0 is freemium (free tier + paid plans). Visit their websites for detailed pricing.