One login, many sites
An OpenID is a single username and password that lets you login to any OpenID-enabled site. OpenID makes remembering different usernames and passwords for different sites a thing of the past.
Getting one is fast & easy
In fact, you may already have one. Every AOL/AIM user has an OpenID address (example: openid.aol.com/screenname). Or you can quickly obtain one from an OpenID provider like myOpenID. It's free!
Works at thousands of sites
There are thousands of OpenID-enabled sites and more are getting on board every day.
37signals single sign-on
Basecamp, Highrise, and Backpack accept OpenID. This means you can use the same OpenID to log into all your accounts, plus any other site that supports OpenID. No more separate logins.
Step-by-step how-to Guides
See our step-by-step guides showing you how to set up Basecamp & OpenID, Highrise & OpenID, and Backpack & OpenID.
It's an open standard
OpenID is a protocol made for the public, by the public. No one — not Google, not Microsoft, not Yahoo — owns or controls your login information: You do.