Clerk vs Keycloak: Which is Better in 2026?
Choosing between Clerk and Keycloak 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:
Clerk
Authentication for modern apps
Best for you if:
- • Modern authentication for developers
- • Drop-in React components for auth
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
| At a Glance |  Clerk | |
|---|---|---|
Starts at | $20/month (annual)Pro | Free |
Best For | Identity & Access | Identity & Access |
Rating | - | - |
Choose Clerk or Keycloak?
Choose Clerk if
Authentication for modern apps
- Beautiful UI components
- Easy setup
- Great DX
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)
| Feature | Clerk | Keycloak |
|---|---|---|
| Pricing Model | Freemium | Free |
| User Rating | ★4.7/5 145 reviews | ★4.3/5 101 reviews |
| Categories | Identity & AccessDeveloper Tools | Identity & AccessSecurity |
In-Depth Analysis
Clerk
Authentication for modern apps
Strengths
- +Beautiful UI components
- +Easy setup
- +Great DX
Weaknesses
- -Vendor lock-in
- -Pricing can add up
Key features
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
Pricing: Clerk vs Keycloak
| Plan | Clerk | Keycloak |
|---|---|---|
| Tier 1 | Free Hobby (Free) | Free Open Source |
| Tier 2 | $20 month (annual) Pro | N/A |
| Tier 3 | $250 month (annual) Business | N/A |
| Tier 4 | Custom Enterprise | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on Clerk pricing and Keycloak pricing.
Who Should Use What?
On a budget?
Keycloak is free. Clerk is freemium.
Go with: Keycloak
Want the highest-rated option?
Neither has user reviews yet.
Go with: Clerk
Value user reviews?
Neither has user reviews yet.
Go with: Keycloak
3 Questions to Help You Decide
What's your budget?
Clerk is freemium. Keycloak is free. 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
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 Clerk or Keycloak better?
Keycloak is rated in our evaluation. Clerk is freemium and Keycloak is free.
What are Clerk and Keycloak used for?
Clerk: Authentication for modern apps. Keycloak: Open-source identity and access management.
What does Clerk cost vs Keycloak?
Clerk is freemium (free tier + paid plans). Keycloak is completely free. Visit their websites for detailed pricing.