Quick Verdict
Choose Auth0 if:
You need enterprise or b2b saas
Choose Firebase if:
You need mobile apps or prototypes
Feature Comparison
| Feature | Auth0 | Firebase |
|---|---|---|
| Free tier | ||
| Starting price | Custom | Custom |
| G2 Rating | 4.4/5 | 4.5/5 |
| API Available |
Pricing Comparison
Monthly Cost by Team Size
* Pricing estimates based on standard paid plans. Actual costs may vary.
Auth0
Pros
- Feature-rich
- Easy integration
- Great SDKs
- Enterprise ready
Cons
- Expensive at scale
- Complex pricing
- Can be overkill
Firebase
Pros
- Easy to start
- Real-time
- Great for mobile
- Google ecosystem
Cons
- Vendor lock-in
- Pricing unpredictable
- Complex queries limited