Difference Between Wildcard and Multi-Domain SSL Certificates
What is the difference between Wildcard and multi-domain SSL certificates
SSL certificates are essential for protecting websites, encrypting user data, and building trust. But if you have multiple domains or subdomains, the question arises: should you choose a Wildcard SSL or a Multi-Domain (SAN) SSL?
Wildcard SSL Certificate 🛡️
A Wildcard SSL secures the main domain and all its first-level subdomains. It is issued in the format *.example.com.
That means it will cover:
www.example.comshop.example.commail.example.com
Pros:
- Perfect for businesses with many subdomains.
- One certificate instead of multiple separate ones.
Cons:
- Does not cover second-level subdomains (
*.sub.example.com). - Cannot secure other domains like
example.net.
Multi-Domain SSL Certificate (SAN) 🌐
A SAN SSL (Subject Alternative Name) can secure several completely different domains under one certificate. For example:
example.comexample.netexample.orgblog.example.com
Depending on the provider, you can add up to 250 domains.
Pros:
- Flexible — you can include different websites in one certificate.
- Saves money and simplifies certificate management.
Cons:
- You need to list each domain explicitly.
- Any domain not added won’t be protected.
Comparison
| Feature | Wildcard SSL | Multi-Domain (SAN) SSL |
|---|---|---|
| Purpose | Protects one domain and all its subdomains | Protects several different domains |
| Example | *.example.com | example.com, example.net, blog.example.com |
| Flexibility | Limited to subdomains of one domain | High — supports multiple domains |
| Cost | Cost-effective for many subdomains | Can be expensive if many domains are added |