An ongoing survey by W3Techs has thrown up some interesting numbers on the state of the global SSL Certificate market. Most notably 23.7% of websites have yet to implement SSL certificates.
W3Techs investigated technologies of websites, not of individual web pages. If a technology was found on any of the pages, it is considered to be used by the website.
W3Techs included only the top 10 million websites (top 1 million before June 2013) in the statistics in order to limit the impact of domain spammers. Website popularity rankings were provided by Alexa (an Amazon.com company) and a 3-month average ranking was used.
W3Techs did not consider subdomains to be separate websites. For instance, sub1.example.com and sub2.example.com are considered to belong to the same site as example.com. That means for example, that all the subdomains of blogger.com, wordpress.com and similar sites are counted only as one website.
W3Techs did not include redirected domains. For example, Sun.com redirects to Oracle.com, and is therefore not counted.
Not surprisingly to us at iWebz, the results show Comodo certificates are preferred by 39.4% of all websites that use SSL certificates, and the free SSL certificate authority Let's Encrypt is yet to get major traction with websites.
The stats are updated daily and are available on W3Techs.com