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Ranked by how many scanned sites use each. Once we see sites drop Google Identity Services (Sign in with Google / One Tap), where they go next ranks first.
Google's social sign-in for websites, as a button or a One Tap prompt.
Growth is sites that added it minus confirmed removals in the last 90 days.
TypeScript authentication framework, MIT licensed and extended through plugins.
Authentication service built into the Supabase backend platform, with client SDKs, API endpoints and an MIT-licensed server.
Open source authentication library for JavaScript frameworks, kept in maintenance mode by the Better Auth team.
Hosted authentication and user management that Clerk describes as a complete user layer for apps.
Deprecated Google sign-in script for websites, superseded by Google Identity Services.
Sign-in backend and client SDKs that come with Google's Firebase app platform.
Okta's customer identity product, with attack protection that grows by plan.
Social sign-in service that can hand the developer an Apple-generated address in place of the person's real email.