Firebase Authentication
Google’s hosted auth with social and phone sign-in.

About Firebase Authentication
In Firebase Authentication’s own words: “Discover Firebase, Google’s mobile and web app development platform that helps developers build apps and games that users will love.”
Firebase Authentication has a free plan.
People switching from Auth0 often consider Firebase Authentication.
Firebase Authentication is an alternative to
Similar to Firebase Authentication
- Amazon CognitoUser sign-up and sign-in on AWS.

- ClerkDrop-in authentication and user management for React apps.

- KeycloakOpen-source identity and access management.

- StytchAuthentication and fraud prevention APIs.

- Supabase AuthOpen-source auth built into Supabase.

- WorkOSEnterprise SSO, directory sync and auth for B2B apps.

Listed for information; LaunchStall isn’t affiliated with Firebase Authentication. The quoted description comes from firebase.google.com. Features and plans change — check the official site for current details.
