Best Keycloak Alternatives 2026
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Looking to switch from Keycloak? Compare the top 4 alternatives with features, pricing, and community reviews.
How we made this: These Keycloak alternatives were selected and ranked by the Noizz Editorial team by category fit, pricing model, and feature overlap, drawing on each tool's public documentation.
Key Takeaways
Keycloak, an established auth & identity option many teams evaluate.
- The #1-ranked Keycloak alternative is Firebase Auth, shown at Free.
- Top alternatives include Firebase Auth, Supertokens, Auth0.
- Category: Auth & Identity.
- Noizz compares the top 4 Keycloak alternatives by features, pricing, and community reviews.
Find the best Keycloak alternative for your team
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Why Consider Keycloak Alternatives?
Keycloak, an established auth & identity option many teams evaluate. Plenty of teams outgrow Keycloak or simply want a second opinion; Auth0 (Free / $23/mo) and Supertokens (Free) are the usual starting points.
For auth providers, compare session handling, MFA options, and per-active-user pricing at your projected scale. Shortlist two or three of the 4 options below and trial them against your real workload before deciding.
Budget-wise this list spans entirely free or open-source options. Each alternative below has been reviewed by the Noizz community across pricing, ease of use, feature depth, and support quality.
Top Keycloak Alternatives
Firebase Auth
Auth & IdentityGoogle authentication service
💰 FreeSupertokens
Auth & IdentityOpen source authentication
💰 FreeAuth0
Auth & IdentityIdentity platform for developers
💰 Free / $23/moClerk
Auth & IdentityDrop-in authentication for React
💰 Free / $25/moPlanetScale
Developer ToolsServerless MySQL-compatible database
💰 Free / $29/moHow to Evaluate Keycloak Alternatives
1. Feature Comparison
Write down the five Keycloak capabilities you touch weekly and test Auth0 and Firebase Auth on exactly those. Everything else on a feature grid is noise.
2. Migration Path
Check whether the alternative supports importing your existing data from Keycloak, Firebase Auth's documentation is the first place to look. A smooth migration path reduces switching costs and downtime.
3. Total Cost of Ownership
Model 12 months of real usage: Auth0 at Free / $23/mo can beat a "cheaper" tool once add-ons land. Firebase Auth is free to start, but factor the time cost of self-serve support. Total cost of ownership beats sticker price.
Frequently Asked Questions
What are the best Keycloak alternatives in 2026?
Top Keycloak alternatives include Firebase Auth, Supertokens, Auth0. Each offers unique features at different price points for auth & identity needs.
Is there a free alternative to Keycloak?
Yes! Several Keycloak alternatives offer free tiers, including Firebase Auth, Supertokens, Auth0, Clerk. Compare them on Noizz.io.
Can I switch from Keycloak to another tool?
Most auth & identity tools support data import and migration. Check each alternative's documentation for specific migration guides from Keycloak.
How much do Keycloak alternatives cost?
Keycloak alternatives range from free options like Firebase Auth to premium tools. Paid plans start around Free / $23/mo (e.g. Auth0). Check each provider's site for current pricing.
Are there open source Keycloak alternatives?
Yes, open source alternatives to Keycloak include Firebase Auth, Supertokens. These offer self-hosting, code transparency, and no vendor lock-in.
Which Keycloak alternative has the most features?
Firebase Auth is often considered feature-rich for auth & identity, though feature comparisons depend on specific use cases. Review pricing tiers, integration options, and roadmaps before choosing, the most feature-rich tool isn't always the best fit.
Why do users switch from Keycloak?
Common reasons users switch from Keycloak include pricing changes, missing features for specific workflows, integration requirements with existing tools, performance concerns, or seeking auth & identity tools with different design philosophies. Each alternative below addresses different needs.
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