Right now we have a dependency on Google as an OAuth2 provider, as that's what we use internally at BuzzFeed. However we've designed sso to allow us to easily add other providers.

For example, there's this task ( https://github.com/buzzfeed/sso/issues/9 ) to create a default provider without Google dependencies for test purposes.

We'd also welcome PRs adding other providers and believe any OAuth2 provider should be straight forward to add.