Auth0 vs Firebase: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Auth0 and Firebase side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Auth0
Identity platform for developers
Best for you if:
- • You want easy integration
Firebase
App development platform by Google
Best for you if:
- • You want google ecosystem
| At a Glance | Auth0 | Firebase |
|---|---|---|
Starts at | Free plan, paid from $35/mo, billed monthly Essentials plan | Free plan |
Category | Identity & Access Security | Cloud & Infrastructure Hosting & Deployment |
Rating | 4.5/5 G2 4.3 · Capterra 4.7 424 reviews | 4.6/5 Capterra 4.6 · G2 4.5 1,073 reviews |
Free plan | Yes | Yes |
Watch out for | Overage pricing at $0.07/MAU applies per user beyond the base limit. | n/a |
Choose Auth0 or Firebase?
Choose Auth0 if
- You want easy integration
- You want many features
- You work in identity & access, not cloud & infrastructure
Choose Firebase if
- You want google ecosystem
- You want real-time features
- You work in cloud & infrastructure, not identity & access
In-Depth Analysis
Auth0
Identity platform for developers
Auth0's free tier at 25,000 MAUs is the most generous in the identity space, far ahead of Firebase Auth (free at 50K MAUs but with fewer features) and Clerk (500 MAUs free).
Watch out
Overage pricing at $0.07/MAU applies per user beyond the base limit.
Strengths
- Pro: Easy integration
- Pro: Many features
- Pro: Great docs
Weaknesses
- Con: Expensive at scale
- Con: Complex pricing
Key features
Firebase
App development platform by Google
Firebase's Spark tier is generous for MVPs.
Strengths
- Pro: Google ecosystem
- Pro: Real-time features
- Pro: Great SDKs
Weaknesses
- Con: Vendor lock-in
- Con: Costs at scale
Key features
Plans and prices: Auth0 vs Firebase
| Tool | Plans and prices | Source |
|---|---|---|
| Auth0 |
| auth0.com/pricing read Oct 31, 2026 |
| Firebase |
| firebase.google.com/pricing read Oct 31, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Auth0 pricing and Firebase pricing.
Key Takeaways
Auth0
- Choose if you want identity platform for developers
Firebase
- Choose if you want app development platform by Google
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- User ratings are within 0.2 points (4.5/5 from 424 reviews for Auth0, 4.6/5 from 1,073 reviews for Firebase).
- Auth0 starts at $35/mo, billed monthly; Firebase has no public paid plan price on file.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Auth0 and Firebase compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. User ratings are within 0.2 points (4.5/5 from 424 reviews for Auth0, 4.6/5 from 1,073 reviews for Firebase). Auth0 starts at $35/mo, billed monthly; Firebase has no public paid plan price on file. Both have a free plan.
What are Auth0 and Firebase used for?
Auth0: Identity platform for developers. Firebase: App development platform by Google.
What does Auth0 cost vs Firebase?
Auth0's cheapest paid plan is Essentials at $35/mo, billed monthly; it also has a free plan. Firebase has no public paid-plan price on file. Prices read on the vendors' pricing pages, latest check Oct 31, 2026.
What's the main difference between Auth0 and Firebase?
Auth0's main strength: easy integration. Firebase's main strength: google ecosystem.