OpenAthens is a federation of specific institutional members, and we are a member service provider within it. The term "Athens" can also refer to various kinds of software that can be used by customers who are either members of the OpenAthens Federation or members of a different authentication federation, such as UKAMF.
We support OpenAthens Federation members through the Institutional Login page.
We support institutions who use Athens software through our Institutional Login page.
There are some features of Athens software in the area of WAYFless linking that do not work with SpringerLink because we are outside the Athens software "universe" (we don't use Eduserv's software). Full integration with all Athens software would require additional development from both SpringerLink and Eduserv.
See also: Athens and Shibboleth additional information