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.
Bottom line: Keycloak wins this matchup. Our overall Identity & Access pick is 1Password. Our free Identity & Access pick is Swiftlane. Pick Clerk if you need a free tier to start with.
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:
- • You want beautiful UI components
- • You want easy setup
Keycloak
Open-source identity and access management
Best for you if:
- • You want a fully free tool (Clerk requires payment)
- • You want open source identity
- • You want self-hostable
| At a Glance | Clerk | |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Identity & Access | Identity & Access |
Rating | 4.8/5 | - |
Free plan | Yes | Yes |
Choose Clerk or Keycloak?
Choose Clerk if
Authentication for modern apps
- You want beautiful UI components
- You want easy setup
Choose Keycloak if
Open-source identity and access management
- You want a fully free tool (Clerk requires payment)
- You want open source identity
- You want self-hostable
| Feature | Clerk | Keycloak |
|---|---|---|
| Pricing Model | Freemium | Free |
| User Rating | ★4.8/5 127 reviews | No ratings yet |
| Categories | Identity & AccessDeveloper Tools | Identity & AccessSecurity |
In-Depth Analysis
Clerk
Authentication for modern apps
Clerk offers the most developer-friendly auth with 50K free users, enough for most startups to reach revenue before paying.
Watch out
SMS authentication costs $0.01 per message (US/CA), adds up for MFA-heavy 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
Keycloak's pricing is exceptionally generous, being entirely free as an open-source solution.
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?
Clerk is rated 4.8/5. Keycloak has no ratings yet.
Go with: Clerk
Value user reviews?
Clerk: 127 reviews (4.8/5). Keycloak: no ratings yet.
Go with: Clerk
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?
Clerk is rated 4.8/5; Keycloak has no ratings yet.
Key Takeaways
Keycloak
- Completely free
- Our pick for this comparison
Clerk
- Choose if you want authentication for modern apps
The Bottom Line
Keycloak wins this matchup. Our overall Identity & Access pick is 1Password. Our free Identity & Access pick is Swiftlane.
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.