Keycloak vs Clerk: Which is Better in 2026?
Choosing between Keycloak and Clerk 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
Clerk
Authentication for modern apps
Best for you if:
- • Modern authentication for developers
- • Drop-in React components for auth
| At a Glance |  Clerk | |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Identity & Access | Identity & Access |
Rating | 4.3/5 | 4.7/5 |
Choose Keycloak or Clerk?
Choose Keycloak if
Open-source identity and access management
- Open source identity
- Self-hostable
- Feature rich
- You want a fully free tool (Clerk requires payment)
Choose Clerk if
Authentication for modern apps
- Beautiful UI components
- Easy setup
- Great DX
| Feature | Keycloak | Clerk |
|---|---|---|
| Pricing Model | Free | Freemium |
| User Rating | ★4.3/5 101 reviews | ★4.7/5 145 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
Clerk
Authentication for modern apps
Strengths
- +Beautiful UI components
- +Easy setup
- +Great DX
Weaknesses
- -Vendor lock-in
- -Pricing can add up
Key features
Pricing: Keycloak vs Clerk
| Plan | Keycloak | Clerk |
|---|---|---|
| Tier 1 | Free Open Source | Free Hobby (Free) |
| Tier 2 | N/A | $20 month (annual) Pro |
| Tier 3 | N/A | $250 month (annual) Business |
| Tier 4 | N/A | Custom Enterprise |
Pricing verified from each vendor's public pricing page. Compare in detail on Keycloak pricing and Clerk pricing.
Who Should Use What?
On a budget?
Keycloak is free. Clerk is freemium.
Go with: Keycloak
Want the highest-rated option?
Keycloak: 4.3/5 (101 reviews). Clerk: 4.7/5 (145 reviews).
Go with: Clerk
Value user reviews?
Keycloak: 101 reviews (4.3/5). Clerk: 145 reviews (4.7/5).
Go with: Clerk
3 Questions to Help You Decide
What's your budget?
Keycloak is free. Clerk 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?
Clerk is rated higher: 4.7/5 vs 4.3/5.
Key Takeaways
Keycloak
- Completely free
- Our pick for this comparison
Clerk
- Higher user rating: 4.7/5 vs 4.3/5
- Larger review base (145 reviews)
The Bottom Line
Keycloak is our pick.
Frequently Asked Questions
Is Keycloak or Clerk better?
Keycloak is rated in our evaluation. Keycloak is free and Clerk is freemium.
What are Keycloak and Clerk used for?
Keycloak: Open-source identity and access management. Clerk: Authentication for modern apps.
What does Keycloak cost vs Clerk?
Keycloak is completely free. Clerk is freemium (free tier + paid plans). Visit their websites for detailed pricing.