Auth & Backend · side by side
Firebase Auth vs Transmit Security
Compare Firebase Auth, Transmit Security by active-user allowances, social login, MFA, SSO, organizations and audit logs.
Auth & Backend pricing calculator
These providers bill in different units. Each estimate uses its own workload; there is no same-volume price winner.
Firebase Auth
25K
Transmit Security
50K
Firebase Auth
$0 / mo
Spark plan · 25K MAUs
Transmit Security
Custom / not listed
Custom / unlisted usage pricing · 50K monthly active users
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 | Transmit Security |
|---|---|---|
| Provider | Transmit Security | |
| Billing unit | MAUs | monthly active users |
| Plan at selected usage | Spark plan | Custom / unlisted usage pricing |
| Monthly estimate | $0/mo | Custom / not listed |
| Workload | 25K MAUs | 50K monthly active users |
| Free access | 50,000 MAUs | Custom trial |
| Published plans | Spark plan, Blaze plan | Full Mosaic Platform, Mosaic for Identity, Mosaic for Identity Fraud and Threat Detection and Response, Mosaic for Identity Verification |
| Prices checked | 2026-10-08 | 2026-10-08 |
Provider
- Firebase Auth
- Transmit Security
- Transmit Security
Billing unit
- Firebase Auth
- MAUs
- Transmit Security
- monthly active users
Plan at selected usage
- Firebase Auth
- Spark plan
- Transmit Security
- Custom / unlisted usage pricing
Monthly estimate
- Firebase Auth
- $0/mo
- Transmit Security
- Custom / not listed
Workload
- Firebase Auth
- 25K MAUs
- Transmit Security
- 50K monthly active users
Free access
- Firebase Auth
- 50,000 MAUs
- Transmit Security
- Custom trial
Published plans
- Firebase Auth
- Spark plan, Blaze plan
- Transmit Security
- Full Mosaic Platform, Mosaic for Identity, Mosaic for Identity Fraud and Threat Detection and Response, Mosaic for Identity Verification
Prices checked
- Firebase Auth
- 2026-10-08
- Transmit Security
- 2026-10-08
Auth & Backend monthly cost
Firebase Auth: $0Transmit Security: Not priced
Different workloads, separate estimates
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.
Auth & Backend feature comparison
| Auth & Backend | Firebase Auth | Transmit Security |
|---|---|---|
| A/B Testing | No-cost | Not listed |
| Analytics | No-cost | Not listed |
| App Check | No-cost, subject to quotas and limits | Not listed |
| App Distribution | No-cost | Not listed |
| App Hosting - Outgoing bandwidth (Uncached) | Not applicable | Not listed |
| App Hosting - Outgoing bandwidth (Cached) | Not applicable | Not listed |
| App Hosting - Storage | Not applicable | Not listed |
| Authentication - Phone Auth | Not applicable | Not listed |
| Authentication - Monthly active users | 50K MAUs | Not listed |
| Authentication - Monthly active users (SAML/OIDC) | 50 MAUs | Not listed |
| Cloud Firestore - Stored data (Standard) | 1 GiB total | Not listed |
| Cloud Firestore - Network egress (Standard) | 10 GiB/month | Not listed |
| Cloud Firestore - Document writes (Standard) | 20K writes/day | Not listed |
| Cloud Firestore - Document reads (Standard) | 50K reads/day | Not listed |
| Cloud Firestore - Document deletes (Standard) | 20K deletes/day | Not listed |
| Cloud Functions - Invocations | Not applicable | Not listed |
| Cloud Functions - Outbound networking | Not applicable | Not listed |
| Cloud Functions - Cloud Build minutes | Not applicable | Not listed |
| Cloud Messaging (FCM) | No-cost | Not listed |
| Crashlytics | No-cost | Not listed |
| Hosting - Storage | 10 GB | Not listed |
| Hosting - Data transfer | 360 MB/day | Not listed |
| Hosting - Custom domain & SSL | Not listed | |
| Hosting - Multiple sites per project | Not listed | |
| In-App Messaging | No-cost | Not listed |
| Performance Monitoring | No-cost | Not listed |
| Realtime Database - Simultaneous connections | 100 | Not listed |
| Realtime Database - Stored data | 1 GB | Not listed |
| Realtime Database - Data downloaded | 10 GB/month | Not listed |
| Realtime Database - Multiple databases per project | Not listed | |
| Remote Config - Fetch Requests | Up to 100,000 per day per project | Not listed |
| Test Lab - Virtual Device Tests | 10 tests/day | Not listed |
| Test Lab - Physical Device Tests | 5 tests/day | Not listed |
| Test Lab - Android Device Streaming | 30 no-cost minutes per project, per month | Not listed |
| Google Cloud BigQuery | Yes (Sandbox limits) | Not listed |
| Google Cloud Other IaaS | Not listed | |
| Gemini in Firebase | No-cost | Not listed |
| Firebase Studio | No-cost for 3 workspaces | Not listed |
A/B Testing
- Firebase Auth
- No-cost
- Transmit Security
- Not listed
Analytics
- Firebase Auth
- No-cost
- Transmit Security
- Not listed
App Check
- Firebase Auth
- No-cost, subject to quotas and limits
- Transmit Security
- Not listed
App Distribution
- Firebase Auth
- No-cost
- Transmit Security
- Not listed
App Hosting - Outgoing bandwidth (Uncached)
- Firebase Auth
- Not applicable
- Transmit Security
- Not listed
App Hosting - Outgoing bandwidth (Cached)
- Firebase Auth
- Not applicable
- Transmit Security
- Not listed
App Hosting - Storage
- Firebase Auth
- Not applicable
- Transmit Security
- Not listed
Authentication - Phone Auth
- Firebase Auth
- Not applicable
- Transmit Security
- Not listed
Authentication - Monthly active users
- Firebase Auth
- 50K MAUs
- Transmit Security
- Not listed
Authentication - Monthly active users (SAML/OIDC)
- Firebase Auth
- 50 MAUs
- Transmit Security
- Not listed
Cloud Firestore - Stored data (Standard)
- Firebase Auth
- 1 GiB total
- Transmit Security
- Not listed
Cloud Firestore - Network egress (Standard)
- Firebase Auth
- 10 GiB/month
- Transmit Security
- Not listed
Cloud Firestore - Document writes (Standard)
- Firebase Auth
- 20K writes/day
- Transmit Security
- Not listed
Cloud Firestore - Document reads (Standard)
- Firebase Auth
- 50K reads/day
- Transmit Security
- Not listed
Cloud Firestore - Document deletes (Standard)
- Firebase Auth
- 20K deletes/day
- Transmit Security
- Not listed
Cloud Functions - Invocations
- Firebase Auth
- Not applicable
- Transmit Security
- Not listed
Cloud Functions - Outbound networking
- Firebase Auth
- Not applicable
- Transmit Security
- Not listed
Cloud Functions - Cloud Build minutes
- Firebase Auth
- Not applicable
- Transmit Security
- Not listed
Cloud Messaging (FCM)
- Firebase Auth
- No-cost
- Transmit Security
- Not listed
Crashlytics
- Firebase Auth
- No-cost
- Transmit Security
- Not listed
Hosting - Storage
- Firebase Auth
- 10 GB
- Transmit Security
- Not listed
Hosting - Data transfer
- Firebase Auth
- 360 MB/day
- Transmit Security
- Not listed
Hosting - Custom domain & SSL
- Firebase Auth
- Transmit Security
- Not listed
Hosting - Multiple sites per project
- Firebase Auth
- Transmit Security
- Not listed
In-App Messaging
- Firebase Auth
- No-cost
- Transmit Security
- Not listed
Performance Monitoring
- Firebase Auth
- No-cost
- Transmit Security
- Not listed
Realtime Database - Simultaneous connections
- Firebase Auth
- 100
- Transmit Security
- Not listed
Realtime Database - Stored data
- Firebase Auth
- 1 GB
- Transmit Security
- Not listed
Realtime Database - Data downloaded
- Firebase Auth
- 10 GB/month
- Transmit Security
- Not listed
Realtime Database - Multiple databases per project
- Firebase Auth
- Transmit Security
- Not listed
Remote Config - Fetch Requests
- Firebase Auth
- Up to 100,000 per day per project
- Transmit Security
- Not listed
Test Lab - Virtual Device Tests
- Firebase Auth
- 10 tests/day
- Transmit Security
- Not listed
Test Lab - Physical Device Tests
- Firebase Auth
- 5 tests/day
- Transmit Security
- Not listed
Test Lab - Android Device Streaming
- Firebase Auth
- 30 no-cost minutes per project, per month
- Transmit Security
- Not listed
Google Cloud BigQuery
- Firebase Auth
- Yes (Sandbox limits)
- Transmit Security
- Not listed
Google Cloud Other IaaS
- Firebase Auth
- Transmit Security
- Not listed
Gemini in Firebase
- Firebase Auth
- No-cost
- Transmit Security
- Not listed
Firebase Studio
- Firebase Auth
- No-cost for 3 workspaces
- Transmit Security
- Not listed
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
Transmit Security features & plan notes
- Passwordless
- Fraud & risk
- Enterprise CIAM
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