Relying Party Stats as of June 1, 2009

OpenID continues to gain market adoption at a steady rate, and in the month of May, the number of OpenID-enabled sites surged at a rate of 86 new enabled sites per day. There are now over 45,000 sites at which you can sign in with an OpenID. As we have mentioned previously, this number is understated, as we count umbrella sites like Blogger, WordPress and LiveJournal (to name a few) as single sites, despite the fact that OpenID commenting is enabled at hundreds of thousands of unique blogs using those services.

We like to think that free platform solutions like RPX have helped fuel adoption for OpenID, by making it simple for website operators to deploy third party authentication in a few hours or less.