Yes, Firebase Authentication has a permanent free tier alongside its paid plans. The free plan includes up to 50K monthly active users with Identity Platform and up to 50 SAML/OIDC monthly active users with Identity Platform. FreeTier.co estimates the free tier at about $25/mo, and no credit card is required to sign up.
About
Firebase Authentication is a backend identity service for apps that need user sign-in across mobile, web, and other platforms. It provides SDKs and ready-made UI libraries for email and password accounts, phone authentication, and federated sign-in providers such as Google, Apple, X, Facebook, and GitHub.
The service includes FirebaseUI for drop-in authentication flows and supports account merging and other common identity workflows. The pricing page shows a perpetual no-cost allowance for Identity Platform usage, including up to 50K monthly active users and up to 50 SAML/OIDC monthly active users, while phone authentication is billed per SMS sent.
- Multi-platform sign-in SDKs
- Email, password, and phone auth
- Federated provider support
- FirebaseUI drop-in auth flows
- Up to 50K MAUs free
- Up to 50 SAML/OIDC MAUs free
- Per-SMS phone verification billing
Free Tier Value
This free tier is genuinely usable and does not require a payment method, but it is still capped: Identity Platform is free up to 50K monthly active users and SAML/OIDC up to 50 MAUs. Compared with the cheapest paid option, the Blaze plan, the free allowance is roughly a quarter of the practical value for a small project, so about $25/month is a fair estimate. The Blaze plan also advertises a one-time $300 credit for eligible users, but that is separate from the recurring monthly value.
What's included in the free tier
Verified
- Access to other authentication services included in Spark.
- Up to 50K monthly active users with Identity Platform.
- Up to 50 SAML/OIDC monthly active users with Identity Platform.
- Phone number verification is not included in the free tier; SMS is billed per message.
See Firebase Authentication pricing for current limits.
Paid plans
Blaze plan
- free credit
- $300 one-time
- Identity Platform MAUs
- 50K MAUs no-cost
- SAML/OIDC MAUs
- 50 MAUs no-cost
- Access more services and higher usage levels
- No-cost usage from Spark plan included
- If eligible, get $300 in free credit
Spark plan
- Identity Platform MAUs
- 50K MAUs
- SAML/OIDC MAUs
- 50 MAUs
- Generous no-cost usage limits
- No payment method needed
- Includes other authentication services at no cost
Pricing extracted from Firebase Authentication's pricing page. Always verify current pricing before committing.
Common questions
Is Firebase Authentication free forever?
Yes. Firebase Authentication has a permanent free tier alongside its paid plans, though the allowance typically resets each month.
Does Firebase Authentication require a credit card?
No. You can start on Firebase Authentication's free tier without entering card details.
What is Firebase Authentication's free tier worth?
Firebase Authentication's free tier is worth about $25 per month. That maps to an FTV score of 67/100. The FTV score is explained at freetier.co/ftv.
