Note that no one can really guarantee unique accounts unless they can use data from the authorities (and even the authorities' data may contain false entries).
Provider | Unique accounts? | Ref* |
---|---|---|
Yes | ||
No | ||
No | ||
Amazon | No | |
Yahoo | No | |
No | ||
Stack Exchange | Yes | |
Yes | ||
Flickr | No | |
GitHub | No | |
No | ||
Myspace | No | ref |
Microsoft | No | |
OpenStreetMap | No | |
Paypal | No |
*For references one can usually search for "Can I have more than one xxxxx account".
See also: https://en.wikipedia.org/wiki/List_of_OAuth_providers
Do you know of any other OAuth provider with unique accounts? Make an edit or a comment.