I’m building an app that needs Google, Apple, and Microsoft login. What should I use?

For an app that needs Google, Apple, and Microsoft login, the usual best choice is:

Use OpenID Connect (OIDC) with OAuth 2.0

• OAuth 2.0 handles authorization
• OpenID Connect adds the actual login / identity layer

This is the standard approach for “Sign in with Google/Apple/Microsoft.”

Best implementation options

1. Use a managed identity provider

If you want the easiest path, use something like:

• Auth0
• Firebase Authentication
• AWS Cognito
• Azure AD B2C / Entra External ID
• Clerk
• Supabase Auth (depending on your needs)

These often support Google, Apple, and Microsoft out of the box, and they simplify:

• token handling
• account linking
• session management
• refresh tokens
• security best practices

2. Build directly with each provider’s OIDC flow

If you want full control, integrate:

• Google Identity Services
• Sign in with Apple
• Microsoft identity platform (Entra ID / Azure AD / Microsoft accounts)

This is more work, but avoids a third-party auth vendor.

Important recommendation

If your app is for consumers and you need all three providers, a managed provider is usually the fastest and safest option.

If you want the technical standard

Use:

• Authorization Code Flow with PKCE
• OIDC discovery
• JWT validation
• A single internal user model that links external identities

My practical recommendation

• Small/medium app: use Auth0 / Clerk / Firebase Auth
• Enterprise / Microsoft-heavy app: consider Azure AD B2C / Entra External ID
• Need maximum control / lowest vendor lock-in: implement OIDC yourself

If you want, I can also recommend the best option based on:

• your backend language
• whether this is mobile, web, or both
• whether you need enterprise SSO
• your budget and expected user scale