Auth0 vs Lets Encrypt: Which is Better in 2026?
Choosing between Auth0 and Lets Encrypt 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.
Bottom line: Lets Encrypt is our overall pick for security workflows. Pick Auth0 if you need identity & access.
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
Lets Encrypt
Free automated SSL/TLS certificates
Best for you if:
- • You need something completely free
- • You need security features specifically
- • Let's Encrypt is a free certificate authority providing SSL/TLS certificates
- • It automates the issuance and renewal of HTTPS certificates for any website
| At a Glance |  Auth0 |  Lets Encrypt |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Identity & Access | Security |
Rating | 4.4/5 | 4.8/5 |
Free plan | Yes | Yes |
Choose Auth0 or Lets Encrypt?
Choose Auth0 if
Identity platform for developers
- Easy integration
- Many features
- Great docs
- Your work is identity & access-shaped, not security-shaped
Choose Lets Encrypt if
Free automated SSL/TLS certificates
- Free SSL certificates
- Automated renewal
- Wide support
- You want a fully free tool (Auth0 requires payment)
- Your work is security-shaped, not identity & access-shaped
| Feature | Auth0 | Lets Encrypt |
|---|---|---|
| Pricing Model | Freemium | Free |
| User Rating | ★4.4/5 388 reviews | ★4.8/5 20 reviews |
| Categories | Identity & AccessDeveloper Tools | SecurityAutomation |
In-Depth Analysis
Auth0
Identity platform for developers
Strengths
- +Easy integration
- +Many features
- +Great docs
Weaknesses
- -Expensive at scale
- -Complex pricing
Key features
Value 65/100. 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. This was increased 300% from the previous $0.023/MAU rate, a 50,000-MAU B2C app on Essentials pays ~$3,500/month, not $35.
Lets Encrypt
Free automated SSL/TLS certificates
Strengths
- +Free SSL certificates
- +Automated renewal
- +Wide support
- +Open source
- +Industry standard
Weaknesses
- -90-day certificates
- -No wildcard easy
- -Setup complexity
- -Rate limits
- -No warranty
Key features
Value 100/100. Let's Encrypt offers an exceptionally fair and generous pricing model, as it is entirely free.
Watch out: Requires technical setup/renewal knowledge
Pricing: Auth0 vs Lets Encrypt
| Plan | Auth0 | Lets Encrypt |
|---|---|---|
| Tier 1 | 0 forever Free | $0 Free |
| 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 Lets Encrypt pricing.
Who Should Use What?
On a budget?
Lets Encrypt is free. Auth0 is freemium.
Go with: Lets Encrypt
Want the highest-rated option?
Auth0: 4.4/5 (388 reviews). Lets Encrypt: 4.8/5 (20 reviews).
Go with: Lets Encrypt
Value user reviews?
Auth0: 388 reviews (4.4/5). Lets Encrypt: 20 reviews (4.8/5).
Go with: Auth0
3 Questions to Help You Decide
What's your budget?
Auth0 is freemium. Lets Encrypt is free. Go with Lets Encrypt if free matters most.
What's your use case?
Auth0 is a identity & access tool. Lets Encrypt is in security. Pick the category that matches your needs.
How important are ratings?
Lets Encrypt is rated higher: 4.8/5 vs 4.4/5.
Key Takeaways
Lets Encrypt
- Higher user rating: 4.8/5 vs 4.4/5
- Completely free
- Our pick for this comparison
Auth0
- Larger review base (388 reviews)
- Better fit for identity & access
The Bottom Line
Lets Encrypt is our pick.
Frequently Asked Questions
Is Auth0 or Lets Encrypt better?
Lets Encrypt is rated in our evaluation. Auth0 is freemium and Lets Encrypt is free.
What are Auth0 and Lets Encrypt used for?
Auth0: Identity platform for developers. Lets Encrypt: Free automated SSL/TLS certificates.
What does Auth0 cost vs Lets Encrypt?
Auth0 is freemium (free tier + paid plans). Lets Encrypt is completely free. Visit their websites for detailed pricing.