Auth & Backend · side by side
Firebase Auth compared to other Authentication & backend providers
Compare Firebase Auth by active-user allowances, social login, MFA, SSO, organizations and audit logs.
Auth & Backend pricing calculator
25K
Firebase Auth
$0 / mo
Spark plan · 25K MAUs
Listed USD plan fees and tracked usage only. Unlisted compute, transfer, extras, taxes and contract terms are excluded. Custom or unsupported plan usage is not estimated.
Auth & Backend overview & pricing
| Auth & Backend | Firebase Auth |
|---|---|
| Provider | |
| Billing unit | MAUs |
| Plan at selected usage | Spark plan |
| Monthly estimate | $0/mo |
| Workload | 25K MAUs |
| Free access | 50,000 MAUs |
| Published plans | Spark plan, Blaze plan |
| Prices checked | 2026-10-08 |
Provider
- Firebase Auth
Billing unit
- Firebase Auth
- MAUs
Plan at selected usage
- Firebase Auth
- Spark plan
Monthly estimate
- Firebase Auth
- $0/mo
Workload
- Firebase Auth
- 25K MAUs
Free access
- Firebase Auth
- 50,000 MAUs
Published plans
- Firebase Auth
- Spark plan, Blaze plan
Prices checked
- Firebase Auth
- 2026-10-08
Auth & Backend monthly cost
Firebase Auth: $0
Cost by MAUs
Cost curve data
| MAUs | Firebase Auth |
|---|---|
| 0 | $0 |
| 6,250 | $0 |
| 12.5K | $0 |
| 25K | $0 |
| 50K | $0 |
| 125K | Not priced |
| 250K | Not priced |
0
- Firebase Auth
- $0
6,250
- Firebase Auth
- $0
12.5K
- Firebase Auth
- $0
25K
- Firebase Auth
- $0
50K
- Firebase Auth
- $0
125K
- Firebase Auth
- Not priced
250K
- Firebase Auth
- Not priced
Auth & Backend feature comparison
| Auth & Backend | Firebase Auth |
|---|---|
| A/B Testing | No-cost |
| Analytics | No-cost |
| App Check | No-cost, subject to quotas and limits |
| App Distribution | No-cost |
| App Hosting - Outgoing bandwidth (Uncached) | Not applicable |
| App Hosting - Outgoing bandwidth (Cached) | Not applicable |
| App Hosting - Storage | Not applicable |
| Authentication - Phone Auth | Not applicable |
| Authentication - Monthly active users | 50K MAUs |
| Authentication - Monthly active users (SAML/OIDC) | 50 MAUs |
| Cloud Firestore - Stored data (Standard) | 1 GiB total |
| Cloud Firestore - Network egress (Standard) | 10 GiB/month |
| Cloud Firestore - Document writes (Standard) | 20K writes/day |
| Cloud Firestore - Document reads (Standard) | 50K reads/day |
| Cloud Firestore - Document deletes (Standard) | 20K deletes/day |
| Cloud Functions - Invocations | Not applicable |
| Cloud Functions - Outbound networking | Not applicable |
| Cloud Functions - Cloud Build minutes | Not applicable |
| Cloud Messaging (FCM) | No-cost |
| Crashlytics | No-cost |
| Hosting - Storage | 10 GB |
| Hosting - Data transfer | 360 MB/day |
| Hosting - Custom domain & SSL | |
| Hosting - Multiple sites per project | |
| In-App Messaging | No-cost |
| Performance Monitoring | No-cost |
| Realtime Database - Simultaneous connections | 100 |
| Realtime Database - Stored data | 1 GB |
| Realtime Database - Data downloaded | 10 GB/month |
| Realtime Database - Multiple databases per project | |
| Remote Config - Fetch Requests | Up to 100,000 per day per project |
| Test Lab - Virtual Device Tests | 10 tests/day |
| Test Lab - Physical Device Tests | 5 tests/day |
| Test Lab - Android Device Streaming | 30 no-cost minutes per project, per month |
| Google Cloud BigQuery | Yes (Sandbox limits) |
| Google Cloud Other IaaS | |
| Gemini in Firebase | No-cost |
| Firebase Studio | No-cost for 3 workspaces |
A/B Testing
- Firebase Auth
- No-cost
Analytics
- Firebase Auth
- No-cost
App Check
- Firebase Auth
- No-cost, subject to quotas and limits
App Distribution
- Firebase Auth
- No-cost
App Hosting - Outgoing bandwidth (Uncached)
- Firebase Auth
- Not applicable
App Hosting - Outgoing bandwidth (Cached)
- Firebase Auth
- Not applicable
App Hosting - Storage
- Firebase Auth
- Not applicable
Authentication - Phone Auth
- Firebase Auth
- Not applicable
Authentication - Monthly active users
- Firebase Auth
- 50K MAUs
Authentication - Monthly active users (SAML/OIDC)
- Firebase Auth
- 50 MAUs
Cloud Firestore - Stored data (Standard)
- Firebase Auth
- 1 GiB total
Cloud Firestore - Network egress (Standard)
- Firebase Auth
- 10 GiB/month
Cloud Firestore - Document writes (Standard)
- Firebase Auth
- 20K writes/day
Cloud Firestore - Document reads (Standard)
- Firebase Auth
- 50K reads/day
Cloud Firestore - Document deletes (Standard)
- Firebase Auth
- 20K deletes/day
Cloud Functions - Invocations
- Firebase Auth
- Not applicable
Cloud Functions - Outbound networking
- Firebase Auth
- Not applicable
Cloud Functions - Cloud Build minutes
- Firebase Auth
- Not applicable
Cloud Messaging (FCM)
- Firebase Auth
- No-cost
Crashlytics
- Firebase Auth
- No-cost
Hosting - Storage
- Firebase Auth
- 10 GB
Hosting - Data transfer
- Firebase Auth
- 360 MB/day
Hosting - Custom domain & SSL
- Firebase Auth
Hosting - Multiple sites per project
- Firebase Auth
In-App Messaging
- Firebase Auth
- No-cost
Performance Monitoring
- Firebase Auth
- No-cost
Realtime Database - Simultaneous connections
- Firebase Auth
- 100
Realtime Database - Stored data
- Firebase Auth
- 1 GB
Realtime Database - Data downloaded
- Firebase Auth
- 10 GB/month
Realtime Database - Multiple databases per project
- Firebase Auth
Remote Config - Fetch Requests
- Firebase Auth
- Up to 100,000 per day per project
Test Lab - Virtual Device Tests
- Firebase Auth
- 10 tests/day
Test Lab - Physical Device Tests
- Firebase Auth
- 5 tests/day
Test Lab - Android Device Streaming
- Firebase Auth
- 30 no-cost minutes per project, per month
Google Cloud BigQuery
- Firebase Auth
- Yes (Sandbox limits)
Google Cloud Other IaaS
- Firebase Auth
Gemini in Firebase
- Firebase Auth
- No-cost
Firebase Studio
- Firebase Auth
- No-cost for 3 workspaces
Showing 15 of 38
Which authentication & backend providers fit your needs?
Firebase Auth features & plan notes
- Google ecosystem
- Phone auth
- Generous no-cost usage limits
- No payment method needed
- Authentication: 50K MAUs (50 MAUs for SAML/OIDC)
- Cloud Firestore: 1 GiB total stored data, 10 GiB/month network egress, 20K writes/day, 50K reads/day, 20K deletes/day
- Hosting: 10 GB storage, 360 MB/day data transfer, custom domain & SSL, multiple sites per project
- Realtime Database: 100 simultaneous connections, 1 GB stored, 10 GB/month downloaded
- Remote Config: Up to 100,000 fetch requests per day per project
- Test Lab: 10 virtual device tests/day, 5 physical device tests/day, 30 no-cost Android device streaming min/month
- SQL Connect: 3-month no-cost trial (limit 1 Cloud SQL instance per project)
- Firebase Studio: No-cost for three workspaces
- No-cost products included: A/B Testing, Analytics, App Check, App Distribution, Cloud Messaging (FCM), Crashlytics, In-App Messaging, Performance Monitoring
How to compare authentication & backend providers
Check how each provider defines an active user and separates consumer identity from enterprise organizations. SAML, MFA, custom domains and audit logs can be gated behind higher plans. A backend platform can also charge separately for storage, functions and traffic.
Browse Auth & Backend pricing