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Facebook SDK vs Sign in with Google: who uses which

Facebook SDK is on more sites: 832,052 against 102,058 for Sign in with Google, about 8.2 times as many. Here's how they compare across the websites we've indexed, and where each one does best.

Where each one is used

DomainFacebook SDKSign in with Google
.com on .com360,46055,037
.jp in Japan36,756685
.org on .org31,2612,586
.cz in Czechia29,089386
.net on .net24,1482,299
.pl in Poland24,9861,061
.vn on .vn23,363606
.uk in the UK16,2194,468

4,762 sites run both at once.

Questions

Which is more popular, Facebook SDK or Sign in with Google?

Facebook SDK is on more sites: 832,052 against 102,058 for Sign in with Google, about 8.2 times as many, across the sites StackGrep has indexed.

Do sites use Facebook SDK and Sign in with Google together?

4,762 sites load both. That's often a switch in progress, or two teams picking different tools.

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