Server certificates compatibility with browsers

Our certificates have a great recognition rate with browsers independently from the OS used.

Important: The recognition rate of each certificate varies according to the amount of work done by the certification authorities. By integrating their root into a maximum of browsers, they guarantee a better recognition rate of their products.

There are significant differences between certificates according to:

• their brand: each certification authority submits its own roots to the browsers of their choices
• their kind: wildcard certificates for example are poorly handled by older browsers
• their hierarchy: depends on the root length

There are two kinds of hierarchy: 1024-bit root hierarchy 2048-bit root hierarchy The root has a determining role in the certificate recognition rate. Consult the differences here: compatibility with 1024-bit roots compatibility with 2048-bit roots

Particular case : if you have a Comodo certificate, you can then choose to link it to a 1024- or a 2048-bit hierarchy. (further information here). The compatibility chart is then a useful tool to help you make a decision.

To sum up:

• Symantec certificates: recognized by 99.6%* of web browsers
• Thawte certificates : 99.8%* (99.6%* for the supercert)
• Comodo certificates: between 98.1* and 99.6%*
• GlobalSign certificates: 99.5%*
• TBS X509 certificates: 97.2%* (97.1% pour le produit multisite)
• Geotrust certificates: 94%*

* calculation made on January 2011