Firebase Auth

Google’s auth platform. Mature, broad provider support, generous free tier.

Firebase Authentication is Google’s auth platform. Wide provider support (email, phone, OAuth, anonymous), generous free tier.

Full setup walkthrough being written.

When to pick

• You’re already using other Firebase services.
• You need phone-number auth at scale (cheap).
• You want anonymous-then-upgrade auth flows.

Setup

Firebase config (apiKey, authDomain, projectId) as VITE_FIREBASE_* env vars. Server-side service account JSON in vly secrets.

Related

Built-in auth

Default vly auth.

Clerk

UI-first alternative.

Twilio

Phone auth alternative.