Auth0 vs Firebase: Pricing Comparison 2026
Side-by-side pricing comparison of Auth0 and Firebase. See all plans, features, and costs at a glance.
Bottom line: Both Auth0 and Firebase offer free plans. Auth0 has 4 pricing tiers while Firebase has 2.
Last updated: May 26, 2026
Auth0 vs Firebase: Quick Pricing Facts
| Feature | Auth0 | Firebase |
|---|---|---|
| Starting Price | $35/mo | Custom pricing |
| Number of Plans | 4 | 2 |
| Free Tier | Yes | Yes |
| Pricing Model | usage-based | usage-based |
| Annual Discount | N/A | N/A |
Auth0 and Firebase are both priced at $35/mo, making them equally accessible Dev Tools. Together they offer 6 pricing plans with 35 features compared, so the best choice comes down to which features match your needs.
Both tools offer free plans, making them accessible for teams on a budget.
Review the detailed tier-by-tier comparison above to see exactly which features are included at each price point and find the best fit for your Dev Tools needs.
| Pricing Plans |  Auth0 Try free |  Firebase Try free |
|---|---|---|
| Tier 1 | Free $0/monthCheapest Includes
| No-cost (Spark plan) $0/monthCheapest Includes
|
| Tier 2 | Essentials $35/monthCheapest $4 / year Includes
| Pay as you go (Blaze plan)Popular Custom pricing Includes
|
| Tier 3 | Professional $240/monthCheapest $28 / year Includes
| - |
| Tier 4 | Enterprise Custom pricing Includes
| - |
← Swipe to compare plans →
Ready to get started? Try either tool free — no credit card required.
Which Should You Choose?
Choose Auth0 if:
- •You need enterprise-grade SSO (SAML, OIDC) and SCIM provisioning
- •Your B2B SaaS product has multi-tenant organizations with role-based access
- •You want a dedicated auth platform with extensive compliance certifications
Choose Firebase if:
- •You want a complete backend platform - auth, database, storage, and hosting bundled together
- •You're building a mobile app (iOS/Android) where Firebase SDKs provide the fastest integration path
- •The free Spark plan covering 10,000 auth verifications/month is sufficient for your scale
Firebase Authentication and Auth0 both handle user login, but Firebase comes bundled with Firestore, Storage, and hosting - making it a full backend platform rather than a pure auth service. Firebase is free for most small projects (Spark plan); paid starts at $25/month (Blaze pay-as-you-go). Auth0 is free to 7,500 MAUs, then $23/month. For mobile apps and Firebase-native backends, Firebase Auth wins on integration depth. For enterprise B2B SaaS with SSO requirements, Auth0 is the stronger choice.
Frequently Asked Questions: Auth0 vs Firebase
How many pricing plans does Auth0 have vs Firebase?
Does Auth0 or Firebase offer a free plan?
Can I save money by paying annually for Auth0 or Firebase?
What is the most popular Firebase plan?
Does Auth0 or Firebase offer custom enterprise pricing?
How do Auth0 and Firebase compare for Dev Tools?
Sources
- Auth0 Official Pricing- Vendor pricing page
- Firebase Official Pricing- Vendor pricing page
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