Firebase Authentication vs smallstep: 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 Firebase Authentication and smallstep 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:
Firebase Authentication
Backend authentication by Google
Best for you if:
- • You want easy to implement
smallstep
Zero-trust access and certificate management
Best for you if:
- • You want zero trust security
| At a Glance | Firebase Authentication | smallstep |
|---|---|---|
Starts at | Free plan | Free plan |
Category | Identity & Access Developer Tools | Identity & Access Security |
Rating | 4.9/5 G2 4.9 5 reviews | 4.2/5 G2 4.2 10 reviews |
Free plan | Yes | Yes |
Watch out for | Phone verification costs $0.01-$0.06 each. | n/a |
Choose Firebase Authentication or smallstep?
Choose Firebase Authentication if
- You want easy to implement
- You want multiple auth methods
Choose smallstep if
- You want zero trust security
- You want certificate management
In-Depth Analysis
Firebase Authentication
Backend authentication by Google
Firebase Authentication's Spark plan is incredibly generous, offering 50,000 MAU for free, which is far more than many competitors.
Watch out
Phone verification costs $0.01-$0.06 each.
Strengths
- Pro: Easy to implement
- Pro: Multiple auth methods
- Pro: Free generous tier
- Pro: Good security
Weaknesses
- Con: Vendor lock-in
- Con: Limited customization
- Con: Part of Google ecosystem
Key features
smallstep
Zero-trust access and certificate management
Smallstep's Enterprise-only pricing, with custom quotes, positions it as an expensive solution, especially for smaller organizations.
Strengths
- Pro: Zero trust security
- Pro: Certificate management
- Pro: Open source option
- Pro: Active development
- Pro: Good documentation
Weaknesses
- Con: Learning curve
- Con: Complex setup
- Con: Enterprise features paid
- Con: Smaller community
- Con: Niche use case
Key features
Plans and prices: Firebase Authentication vs smallstep
| Tool | Plans and prices | Source |
|---|---|---|
| Firebase Authentication |
| firebase.google.com/products/auth read Oct 5, 2026 |
| smallstep |
| smallstep.com/pricing read Sep 29, 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 Firebase Authentication pricing and smallstep pricing.
Key Takeaways
Firebase Authentication
- Choose if you want backend authentication by Google
smallstep
- Choose if you want zero-trust access and certificate management
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 rest on too few reviews to rank (4.9/5 from 5 reviews for Firebase Authentication, 4.2/5 from 10 reviews for smallstep; we compare ratings only above 20 reviews on both sides).
- 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 Firebase Authentication and smallstep 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 rest on too few reviews to rank (4.9/5 from 5 reviews for Firebase Authentication, 4.2/5 from 10 reviews for smallstep; we compare ratings only above 20 reviews on both sides). Both have a free plan.
What are Firebase Authentication and smallstep used for?
Firebase Authentication: Backend authentication by Google. smallstep: Zero-trust access and certificate management.
What does Firebase Authentication cost vs smallstep?
Firebase Authentication has no public paid-plan price on file. smallstep has no public paid-plan price on file. Prices read on the vendors' pricing pages, latest check Oct 5, 2026.
What's the main difference between Firebase Authentication and smallstep?
Firebase Authentication's main strength: easy to implement. smallstep's main strength: zero trust security.