What is a Multi-domain SSL certificate?

SSL certificates are data files which link information about a company or an individual to a cryptographic key. Installed on a server, this certificate ensures the security of a connection between a browser and a web server. It activates the ‘https’ protocol and a padlock icon shows up in the search bar.

Pricing options

Prices for Hong Kong, in HKD (HKD), for A rates.

Packs Free Standard Pro Business
Select Select Select Select
2048-bit KeyYesYesYesYes
Online validationYesYesNoNo
Organization validationNoNoYesYes
Extended Validation
("green bar")
NoNoNoYes
Transaction warrantyNoNo Up to $250,000 Up to $250,000
Automated certificate managementYesNoNoNo
Can be used On Simple Hosting Everywhere Everywhere Everywhere
Single address
(domain + www subdomain)
Free HK$124.00 per year HK$364.25 per year HK$2,790.00 per year
WildcardNo HK$1,240.00 per year HK$2,635.00 per year No
Multi-domainNo Starting at HK$387.50 per year No Starting at HK$4,921.25 per year

What can be secured with an SSL certificate?

SSL certificates are useful for protecting sensitive data such as:

  • Customer registration and identification data on a website (name, address, password, email, phone number, etc.),
  • Customers’ payment information (credit card, bank details, etc.),
  • Data entry forms present on the website,
  • Documents the customers can download,
  • Transactions,
  • Data storage.

What's the difference between the various types of SSL certificates?

More and more companies make use of both multi-domain and other SSL certificate types for various reasons. Generally speaking, SSL certificates are a means of:

  • Providing a high level of data confidentiality,
  • Reinforcing the confidence of Internet users in a website's legitimacy.

Extended validation (EV) SSL certificates for businesses are available, and make it possible to:

  • Verify the legal and physical existence of the company,
  • Check that the information conveyed about the company (its address, for example) is accurate,
  • Check that the domain name does, in fact, belong to the company,
  • Check that the company has given its permission to generate the certificate,
  • Limit the risk of being targeted by a phishing attack.

As for the multi-domain SSL certificate, it is useful for companies that have a list of addresses that they want to cover using a single certificate.

What are the advantages of a multi-domain SSL certificate?

Available in Standard and Business versions, a multi-domain SSL certificate can prove more cost-effective than purchasing and managing multiple single-address certificates. Gandi offers four package sizes to respectively secure:

  • A maximum of 3 domains,
  • A maximum of 5 domains,
  • A maximum of 10 domains,
  • A maximum of 20 domains.

Each address counts as a domain and will be deducted from the total number of allowed addresses. Thus, it is possible to protect ‘www.example.com’, ‘shop.example.com’, ‘www.example.net’, ‘shop.example.net’, etc. all at the same time.

Whenever necessary, you may regenerate the certificate to modify the number or the addresses themselves. This allows you to add or to remove secondary addresses should you wish to do so. The main address, however, is used to generate the CSR and therefore can’t be modified.

Regenerating a certificate is a simple operation. This may be done automatically, or manually: thanks to this option, you will be able to select new alternate addresses for your multi-domain SSL certificate.

Pricing options

Prices for Hong Kong, in HKD (HKD), for A rates.

Packs Free Standard Pro Business
Select Select Select Select
2048-bit KeyYesYesYesYes
Online validationYesYesNoNo
Organization validationNoNoYesYes
Extended Validation
("green bar")
NoNoNoYes
Transaction warrantyNoNo Up to $250,000 Up to $250,000
Automated certificate managementYesNoNoNo
Can be used On Simple Hosting Everywhere Everywhere Everywhere
Single address
(domain + www subdomain)
Free HK$124.00 per year HK$364.25 per year HK$2,790.00 per year
WildcardNo HK$1,240.00 per year HK$2,635.00 per year No
Multi-domainNo Starting at HK$387.50 per year No Starting at HK$4,921.25 per year

FAQ / frequently asked questions

What hosting plan should I choose?

Gandi offers several different types of quality web hosting that are easy to use:

How do I choose the right domain for me?

Explore our various services:

How can I secure my website?

What solutions do you have for online file storage?

We make the Nextcloud open-source platform easy to install and use. It lets you store, share, and easily engage in collaborative work. It's a great way to control your data online.