Keycloak vs Auth0: Which is Better 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.
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
- • 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:
- • Industry-leading identity platform
- • Authentication and authorization as a service
| At a Glance |  Auth0 | |
|---|---|---|
Starts at | Free | 35/monthEssentials |
Best For | Identity & Access | Identity & Access |
Rating | - | - |
Choose Keycloak or Auth0?
Choose Keycloak if
Open-source identity and access management
- Open source identity
- Self-hostable
- Feature rich
- You want a fully free tool (Auth0 requires payment)
Choose Auth0 if
Identity platform for developers
- Easy integration
- Many features
- Great docs
| Feature | Keycloak | Auth0 |
|---|---|---|
| Pricing Model | Free | Freemium |
| User Rating | ★4.3/5 101 reviews | ★4.4/5 388 reviews |
| Categories | Identity & AccessSecurity | Identity & AccessDeveloper Tools |
In-Depth Analysis
Keycloak
Open-source identity and access management
Strengths
- +Open source identity
- +Self-hostable
- +Feature rich
- +No per-user cost
- +Enterprise ready
Weaknesses
- -Complex to set up
- -Requires maintenance
- -Learning curve
- -Java-based
- -UI dated
Key features
Auth0
Identity platform for developers
Strengths
- +Easy integration
- +Many features
- +Great docs
Weaknesses
- -Expensive at scale
- -Complex pricing
Key features
Pricing: Keycloak vs Auth0
| Plan | Keycloak | Auth0 |
|---|---|---|
| Tier 1 | Free Open Source | 0 forever Free |
| Tier 2 | N/A | 35 /month Essentials |
| Tier 3 | N/A | 240 /month Professional |
| Tier 4 | N/A | Custom /month Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Keycloak pricing and Auth0 pricing.
Who Should Use What?
On a budget?
Keycloak is free. Auth0 is freemium.
Go with: Keycloak
Want the highest-rated option?
Neither has user reviews yet.
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?
Both are identity & access tools. Compare their specific features to decide.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Keycloak
- Completely free
- Our pick for this comparison
Auth0
- Higher user rating: 4.4/5 vs 4.3/5
- Larger review base (388 reviews)
The Bottom Line
Keycloak is our pick.
Frequently Asked Questions
Is Keycloak or Auth0 better?
Keycloak is rated 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.