Spring Boot Guide Best Authentication for Spring Boot (2026)
Compare the best authentication solutions for Spring Boot. We review Spring Security, Keycloak, Auth0, and more with Java integration patterns.
Spring Security is the most comprehensive security framework in any language. We've evaluated authentication providers that integrate well with Spring's security architecture.
Why This Matters
Spring Security handles authentication, authorization, CSRF, session management, and more. The right provider simplifies configuration while maintaining enterprise-grade security.
Key Considerations
Spring Security Integration
Most providers offer Spring Security starters or OAuth2 Resource Server configuration. Native integration reduces boilerplate.
OAuth2 Resource Server
Spring Security's OAuth2 Resource Server validates JWTs from any provider. Standard approach for APIs.
Session vs JWT
Spring Security supports both session-based and stateless JWT auth. Choose based on your architecture.
Method Security
Spring's @PreAuthorize annotations work with any auth provider. Role-based access at method level.
Enterprise Requirements
Consider LDAP, SAML, and compliance requirements. Spring Security and Keycloak excel here.
Our Recommendations
Keycloak
Best Open Source Excellent Support Official SDKKeycloak is the gold standard for Spring Boot. First-party Spring Boot starter. SAML, LDAP, social login. Self-host or cloud. Enterprise-grade, free.
spring-boot-starter-oauth2-resource-server 
Auth0
Best Managed Excellent Support Official SDKAuth0 has official Spring Boot SDK. Universal Login, social connections, MFA. 7,500 MAU free. Best managed option for Java.
com.auth0:auth0-spring-boot-starter 
Okta
Best Enterprise Excellent Support Official SDKOkta has official Spring Boot starter. Enterprise SSO, workforce identity. 15,000 MAU free. Excellent for corporate environments.
com.okta.spring:okta-spring-boot-starter 
Clerk
Best DX Good SupportClerk provides modern auth with excellent DX. Use as OAuth2 provider with Spring Security. 10,000 MAU free. Best for modern web apps.
Configure as OAuth2 Resource Server 
Supabase Auth
Best with Supabase Good SupportSupabase Auth works as JWT issuer with Spring Security Resource Server. 50,000 MAU free. Use if already on Supabase.
Validate Supabase JWTs with Resource Server Quick Comparison
| Service | TypeScript | Edge | Free Tier | Setup Time |
|---|---|---|---|---|
| Keycloak | none | — | Unlimited (self-host) | 30 min |
| Auth0 | none | — | 7,500 MAU | 20 min |
| Okta | none | — | 15,000 MAU | 25 min |
| Clerk | none | — | 10,000 MAU | 25 min |
| Supabase Auth | none | — | 50,000 MAU | 20 min |
Quick Start
@Configuration
@EnableWebSecurity
public class SecurityConfig {
@Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
.authorizeHttpRequests(auth -> auth
.requestMatchers("/api/public/**").permitAll()
.anyRequest().authenticated()
)
.oauth2ResourceServer(oauth2 -> oauth2
.jwt(jwt -> jwt
.jwtAuthenticationConverter(jwtAuthConverter())
)
);
return http.build();
}
}Common Integration Patterns
Keycloak + Spring Boot
Full-featured auth with Keycloak, Spring Security integration.
Auth0 + Spring Boot API
Auth0 for authentication, Spring Security for authorization.
Okta + Spring Cloud
Okta for enterprise SSO across Spring microservices.