Best Authentication & Identity APIs in 2026

Identity management, OAuth, verification, and bot protection APIs. Secure your app without building auth from scratch.

12 APIs across 5 subcategories

Identity Platform(6)

FreemiumIdentity Platform

17.9M/wk

Supabase Auth

Open-source auth with row-level security tied to PostgreSQL.

CLI

Quality

npm i @supabase/supabase-js

FreemiumIdentity Platform

6.4M/wk

Firebase Authentication

Google-backed auth for mobile and web with social login support.

CLI

Quality

npm i firebase

FreemiumIdentity Platform

2.4M/wk

AWS Cognito

User sign-up, sign-in, and access control for AWS apps.

CLI

Quality

npm i @aws-sdk/client-cognito-identity-provider

FreemiumIdentity Platform

1.3M/wk

Auth0 API

Authentication, authorisation, and user management for apps.

CLI

Quality

npm i auth0

PaidIdentity Platform

245k/wk

Okta API

Enterprise identity management, SSO, and MFA.

CLI

Quality

npm i @okta/okta-sdk-nodejs

FreemiumIdentity Platform

77k/wk

Clerk API

Drop-in auth components with user management and session handling.

CLI

Quality

npm i @clerk/clerk-sdk-node

OAuth Providers(2)

FreeOAuth Providers

7.3M/wk

Google OAuth 2.0

Google sign-in and OAuth 2.0 authorisation for apps.

CLI

Quality

npm i googleapis

FreeOAuth Providers

Apple Sign In

CLI

Quality

Auth Framework(1)

Auth Framework

45k/wk

Better Auth

Framework-agnostic TypeScript auth library. Self-hosted, open-source, with built-in support for email/password, social login, 2FA, and session management.

CLI

Quality

npm i better-auth

Verification(1)

Pay-per-useVerification

Twilio Verify

Phone verification via SMS, voice, email, and TOTP.

CLI

Quality

Bot Protection(2)

FreemiumBot Protection

reCAPTCHA API

Protect sites from spam and abuse with CAPTCHA challenges.

CLI

Quality

FreeBot Protection

Turnstile (Cloudflare)

Privacy-preserving CAPTCHA alternative from Cloudflare.

CLI

Quality

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