Keycloak vs Firebase Authentication: Which Should You Choose in 2026?
Choosing between Keycloak and Firebase Authentication 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 want the higher-rated option (8.8/10 vs 0.0/10)
- • 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
Firebase Authentication
Backend authentication by Google
Best for you if:
- • You need low-code backend features specifically
- • Backend authentication service
- • Multiple sign-in methods
| At a Glance |  Firebase Authentication | |
|---|---|---|
Price | Free | Free + Paid |
Best For | Password Managers | Low-Code Backend |
Rating | 88/100 | —/100 |
| Feature | Keycloak | Firebase Authentication |
|---|---|---|
| Pricing Model | Free | Freemium |
| Editorial Score | 88 | — |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | Password ManagersIdentity & Access | Low-Code BackendIdentity & Access |
How Keycloak and Firebase Authentication Compare
Keycloak
Open-source identity and access management
Free · 88/100 score
Firebase Authentication
Backend authentication by Google
Free tier available
Keycloak is a password managers tool. Firebase Authentication is in low-code backend.
Who Should Use What?
On a budget?
Keycloak is free. Firebase Authentication is freemium.
Go with: Keycloak
Want the highest-rated option?
Keycloak scores 88/100. Firebase Authentication is unrated.
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. Firebase Authentication is freemium. Go with Keycloak if free matters most.
What's your use case?
Keycloak is a password managers tool. Firebase Authentication is in low-code backend. Pick the category that matches your needs.
How important are ratings?
Not all tools have been rated yet.
Key Takeaways
Keycloak
- Higher score: 88/100 vs unrated
- Completely free
- Our pick for this comparison
Firebase Authentication
- Better fit for low-code backend
The Bottom Line
Keycloak (88/100) is our pick.
Frequently Asked Questions
Is Keycloak or Firebase Authentication better?
Keycloak scores 88/100 in our evaluation. Keycloak is free and Firebase Authentication is freemium.
What are Keycloak and Firebase Authentication used for?
Keycloak: Open-source identity and access management. Firebase Authentication: Backend authentication by Google.
What does Keycloak cost vs Firebase Authentication?
Keycloak is completely free. Firebase Authentication is freemium (free tier + paid plans). Visit their websites for detailed pricing.