Auth0 vs smallstep: Which is Better in 2026?
Choosing between Auth0 and smallstep comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Auth0
Identity platform for developers
Best for you if:
- • You need identity & access features specifically
- • Industry-leading identity platform
- • Authentication and authorization as a service
smallstep
Zero-trust access and certificate management
Best for you if:
- • You need security features specifically
- • smallstep is an open-source certificate management platform
- • It provides automated TLS certificates for internal infrastructure
| At a Glance |  Auth0 |  smallstep |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Identity & Access | Security |
Rating | 4.4/5 | 4.2/5 |
Free plan | Yes | Yes |
Choose Auth0 or smallstep?
Choose Auth0 if
Identity platform for developers
- Easy integration
- Many features
- Great docs
- Your work is identity & access-shaped, not security-shaped
Choose smallstep if
Zero-trust access and certificate management
- Zero trust security
- Certificate management
- Open source option
- Your work is security-shaped, not identity & access-shaped
| Feature | Auth0 | smallstep |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | ★4.4/5 388 reviews | ★4.2/5 10 reviews |
| Categories | Identity & AccessDeveloper Tools | SecurityDeveloper Tools |
In-Depth Analysis
Auth0
Identity platform for developers
Strengths
- +Easy integration
- +Many features
- +Great docs
Weaknesses
- -Expensive at scale
- -Complex pricing
Key features
smallstep
Zero-trust access and certificate management
Strengths
- +Zero trust security
- +Certificate management
- +Open source option
- +Active development
- +Good documentation
Weaknesses
- -Learning curve
- -Complex setup
- -Enterprise features paid
- -Smaller community
- -Niche use case
Key features
Pricing: Auth0 vs smallstep
| Plan | Auth0 | smallstep |
|---|---|---|
| Tier 1 | 0 forever Free | Custom Enterprise |
| Tier 2 | 35 /month Essentials | N/A |
| Tier 3 | 240 /month Professional | N/A |
| Tier 4 | Custom /month Enterprise | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on Auth0 pricing and smallstep pricing.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Auth0
Want the highest-rated option?
Auth0: 4.4/5 (388 reviews). smallstep: 4.2/5 (10 reviews).
Go with: Auth0
Value user reviews?
Auth0: 388 reviews (4.4/5). smallstep: 10 reviews (4.2/5).
Go with: Auth0
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Auth0 is a identity & access tool. smallstep is in security. Pick the category that matches your needs.
How important are ratings?
Auth0 is rated higher: 4.4/5 vs 4.2/5.
Key Takeaways
Auth0
- Higher user rating: 4.4/5 vs 4.2/5
- Larger review base (388 reviews)
- Free tier available
- Our pick for this comparison
smallstep
- Better fit for security
The Bottom Line
Auth0 is our pick.
Frequently Asked Questions
Is Auth0 or smallstep better?
Auth0 is rated in our evaluation. Both are freemium.
What are Auth0 and smallstep used for?
Auth0: Identity platform for developers. smallstep: Zero-trust access and certificate management.
What does Auth0 cost vs smallstep?
Auth0 is freemium (free tier + paid plans). smallstep is freemium (free tier + paid plans). Visit their websites for detailed pricing.