Google+ Sign-In Button
trend
98,276 websites

Google+ Sign-In Button is free to use

https://developers.google.com/+/web/signin/

Google+ Sign-In button allows users to authenticate on websites using their Google+ account.

VS

OpenID
trend
28,174,456 websites

OpenID is free to use

http://openid.net

The website supports openid single digital identity via the use of OpenID.

Market Share by Top Websites

1 OpenID is leading in Top 100K Sites, Top 1M Sites and The Entire Web.

2 Google+ Sign-In Button is leading in Top 10K Sites.

Websites Categories

1 OpenID has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Business & Industry, Internet & Telecom and 242 other categories.

2 Google+ Sign-In Button hasn't got a lead over OpenID in any websites category.

Geography

1 OpenID is leading in most countries, including Brazil, Spain, Mexico, India and 230 other countries.

2 Google+ Sign-In Button is leading in British Indian Ocean Territory.